A class of Arthropoda that includes SPIDERS; TICKS; MITES; and SCORPIONS.
Arthropods of the class ARACHNIDA, order Araneae. Except for mites and ticks, spiders constitute the largest order of arachnids, with approximately 37,000 species having been described. The majority of spiders are harmless, although some species can be regarded as moderately harmful since their bites can lead to quite severe local symptoms. (From Barnes, Invertebrate Zoology, 5th ed, p508; Smith, Insects and Other Arthropods of Medical Importance, 1973, pp424-430)
Arthropods of the order Scorpiones, of which 1500 to 2000 species have been described. The most common live in tropical or subtropical areas. They are nocturnal and feed principally on insects and other arthropods. They are large arachnids but do not attack man spontaneously. They have a venomous sting. Their medical significance varies considerably and is dependent on their habits and venom potency rather than on their size. At most, the sting is equivalent to that of a hornet but certain species possess a highly toxic venom potentially fatal to humans. (From Dorland, 27th ed; Smith, Insects and Other Arthropods of Medical Importance, 1973, p417; Barnes, Invertebrate Zoology, 5th ed, p503)
Members of the phylum Arthropoda, composed of organisms having a hard, jointed exoskeleton and paired jointed legs. It includes the class INSECTS and the subclass ARACHNIDA, many species of which are important medically as parasites or as vectors of organisms capable of causing disease in man.
Geological formations consisting of underground enclosures with access from the surface.
An infectious disease caused by a spirochete, BORRELIA BURGDORFERI, which is transmitted chiefly by Ixodes dammini (see IXODES) and pacificus ticks in the United States and Ixodes ricinis (see IXODES) in Europe. It is a disease with early and late cutaneous manifestations plus involvement of the nervous system, heart, eye, and joints in variable combinations. The disease was formerly known as Lyme arthritis and first discovered at Old Lyme, Connecticut.
Highly keratinized processes that are sharp and curved, or flat with pointed margins. They are found especially at the end of the limbs in certain animals.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
Platforms that provide the ability and tools to create and publish information accessed via the INTERNET. Generally these platforms have three characteristics with content user generated, high degree of interaction between creator and viewer, and easily integrated with other sites.
Activities concerned with governmental policies, functions, etc.
Infestations with arthropods of the subclass ACARI, superorder Acariformes.
Any arthropod of the subclass ACARI except the TICKS. They are minute animals related to the spiders, usually having transparent or semitransparent bodies. They may be parasitic on humans and domestic animals, producing various irritations of the skin (MITE INFESTATIONS). Many mite species are important to human and veterinary medicine as both parasite and vector. Mites also infest plants.
A large, subclass of arachnids comprising the MITES and TICKS, including parasites of plants, animals, and humans, as well as several important disease vectors.
Exocrine glands in animals which secrete scents which either repel or attract other animals, e.g. perianal glands of skunks, anal glands of weasels, musk glands of foxes, ventral glands of wood rats, and dorsal glands of peccaries.
Family of MITES in the superfamily Trombiculoidea, suborder Prostigmata, which attack humans and other vertebrates, causing DERMATITIS and severe allergic reactions. Chiggers, red bugs, and harvest mites commonly refer to the larval stage of Trombiculid mites, the only parasitic stage of the mite's life cycle.
Venoms from animals of the order Scorpionida of the class Arachnida. They contain neuro- and hemotoxins, enzymes, and various other factors that may release acetylcholine and catecholamines from nerve endings. Of the several protein toxins that have been characterized, most are immunogenic.
A venomous New World spider with an hourglass-shaped red mark on the abdomen.
Facilities which provide information concerning poisons and treatment of poisoning in emergencies.
Venoms of arthropods of the order Araneida of the ARACHNIDA. The venoms usually contain several protein fractions, including ENZYMES, hemolytic, neurolytic, and other TOXINS, BIOLOGICAL.
The effects, both local and systemic, caused by the bites of SPIDERS.
Venoms from animals of the phylum Arthropoda. Those most investigated are from scorpions and spiders of the class Arachnidae and from ant, bee, and wasp families of the Insecta order Hymenoptera. The venoms contain protein toxins, enzymes, and other bioactive substances and may be lethal to man.
Family of parasitic MITES, in the superfamily Sarcoptoidea, order Astigmata. Genera include Psoroptes and Chorioptes.
An order of small, wingless parasitic insects, commonly known as lice. The suborders include ANOPLURA (sucking lice); AMBLYCERA; ISCHNOCERA; and Rhynchophthirina (elephant and warthog lice).
A suborder of chewing lice, in the order PHTHIRAPTERA, that are parasites of birds and mammals.
Diseases of domestic and mountain sheep of the genus Ovis.
A republic in southern Africa, the southernmost part of Africa. It has three capitals: Pretoria (administrative), Cape Town (legislative), and Bloemfontein (judicial). Officially the Republic of South Africa since 1960, it was called the Union of South Africa 1910-1960.
Woody, usually tall, perennial higher plants (Angiosperms, Gymnosperms, and some Pterophyta) having usually a main stem and numerous branches.
A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
A subfamily of the Old World monkeys, CERCOPITHECIDAE, that inhabits the forests of Africa and Asia. The genera COLOBUS (Procolobus; colobus), Nasalis (proboscis monkey), Presbytis (Semnopithecus; leaf monkey), Pygathrix (Rhinopithecus; snub-nosed monkey), and Simias (pig-tailed langur) all belong to this subfamily.
The study of microorganisms such as fungi, bacteria, algae, archaea, and viruses.
A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.
Individuals enrolled in a school or formal educational program.

Actin filaments in the acrosomal reaction of Limulus sperm. Motion generated by alterations in the packing of the filaments. (1/78)

When Limulus sperm are induced to undergo the acrosomal reaction, a process, 50 mum in length, is generated in a few seconds. This process rotates as it elongates; thus the acrosomal process literally screws through the jelly of the egg. Within the process is a bundle of filaments which before induction are coiled up inside the sperm. The filament bundle exists in three stable states in the sperm. One of the states can be isolated in pure form. It is composed of only three proteins whose molecular weights (mol wt) are 43,000, 55,000, and 95,000. The 43,000 mol wt protein is actin, based on its molecular weight, net charge, morphology, G-F transformation, and heavy meromyosin (HMM) binding. The 55,000 mol wt protein is in equimolar ratio to actin and is not tubulin, binds tenaciously to actin, and inhibits HMM binding. Evidence is presented that both the 55,000 mol wt protein and the 95,000 mol wt protein (possibly alpha-actinin) are also present in Limulus muscle. Presumably these proteins function in the sperm in holding the actin filaments together. Before the acrosomal reaction, the actin filaments are twisted over one another in a supercoil; when the reaction is completed, the filaments lie parallel to each other and form an actin paracrystal. This change in their packing appears to give rise to the motion of the acrosomal process and is under the control of the 55,000 mol wt protein and the 95,000 mol wt protein.  (+info)

The structure of arthropod and mollusc hemocyanins. (2/78)

The hemocyanins from molluscs and from arthropods differ in the size of their polypeptide chains. A variety of physical techniques including sodium dodecyl sulfate polyacrylamide gel electrophoresis and column chromatography in sodium dodecyl sulfate and guanidine HCl indicate that the polypeptide chain of mollusc hemocyanin has a molecular weight of 290,000. These results were corroborated by quantitative end group analyses. Several experiments designed to count the number of tryptophan and methionine-containing peptides in the hemocyanin from the whelk Busycon canaliculatum indicate that sequence homology within the polypeptide chain of the mollusc hemocyanins accounts for their large size. Digestion of the native protein with subtilisin produces a 50,000-dalton fragment in high yield which corresponds to one binding site for oxygen. On the other hand, the polypeptide chain molecular weight of lobster hemocyanin is 76,000 to 78,000 and this seems to be a general property of all arthropod hemocyanins. The pigment from lobster consists of two very similar polypeptide chains which are not present in equal amount. Analysis of the cysteine-containing and of the tryptophan-containing tryptic peptides confirms the value of the molecular weight. However, separation of fragments which contain methionine indicates that there is sequence homology withing the polypeptide chain of this protein. It is concluded that the mollusc and arthropod hemocyanins have little structural similarity.  (+info)

Sialyl residues in hepatitis B antigen: their role in determining the life span of the antigen in serum and in eliciting an immunological response. (3/78)

Hepatitis B surface antigen was adsorbed to insolubilized sialic acid-specific haemagglutinin isolated from the haemolymph of Limulus polyphemus. Treatment of the antigen with Vibrio cholerae neuraminidase (EC 3.2.1.18) resulted in the release of sialic acid and in an increase of the isoelectric point from pH 4-35 (for subtype ad) or 4-9 (for subtype ay) to pH 5-45. Treated, but not untreated, antigen incorporated [14-C]-sialic acid when incubated at 37 degrees C with sialyl transferase (EC 2.4.99.1) and cytidine-5'-monophosphate-[14-C]-sialic acid. The major portion of [14-C]-sialic acid was linked to a glycoprotein with an apparent mol. wt. of 26 x 10-a. De-sialylated antigen had a drastically reduced in vivo life span in rabbit plasma and elicited a higher humoral antibody response than intact antigen (subtype ad). Antigen-stimulated proliferation of lymphocytes, measured 3 months after immunization, was observed only with cells from rabbits injected with neuraminidase-treated antigen.  (+info)

A novel quinoline alkaloid possessing a 7-benzyl group from the centipede, Scolopendra subspinipes. (4/78)

The novel quinoline alkaloid scolopendrine was isolated from the centipede, Scolopendra subspinipes mutilans L. Koch. The structure was determined to be 2-hydroxy-7-[(4-hydroxy-3-methoxyphenyl)methyl]-3-methoxy-8-quinolyl sulfate on the basis of high-resolution electron-spray ionization mass spectroscopy and two-dimensional NMR spectral data. Unlike quinoline alkaloids so far reported, scolopendrine is unique in having a 7-benzyl moiety in the quinoline ring.  (+info)

Properties of visual cells in the lateral eye of Limulus in situ. (5/78)

Excitatory properties of visual cells in the lateral eye of Limulus, investigated by optic nerve recordings in situ, differ significantly from the properties of cells in the classical, excised eye preparation. The differences suggest the possibility that two receptor mechanisms function in the eye in situ: one mechanism encodes low light intensities and the other responds to high intensities. The two mechanisms enable each ommatidium to respond over an intensity range of approximately 10 log units. This hypothesis was tested by measuring the increment threshold and the spectral sensitivity, by studying light and dark adaptation, and by analyzing the variability of the impulse discharge. Although the results do not conclusively identify two receptor mechanisms, they indicate that a process or a part of a process that functions in the eye in situ is abolished by excising the eye or cutting off its blood supply.  (+info)

Specific effect of neuraminidase on blastogenic response of sensitized lymphocytes. (6/78)

The blastogenic response of sensitized lymphocytes from guinea-pigs to 'de novo' antigens (KLH, HCH and PPD) was ehhanced by BCN treatment in twenty-one of twenty-three instances. In contrast, no effect of VCN on nonsensitized guinea-pig lymphocyte response to these antigens, or to mumps antigen, was noted in any of thirty-four instances, These findings indicate that the enhancement effect of VCN is specific for sensitized lymphocytes. Heating VCN at 100 degrees for 10 minutes completely abolished the enhancement effect on the lymphocyte response. VCN treatment did not change the kinetics of antigen-induced blastogenesis. The increased lymphocyte response could probably be related to unmasking of the antigen receptor sites of the cells, resulting in increased antigen uptake, following the VCN treatment.  (+info)

Endotoxin as a cause of aseptic meningitis after radionuclide cisternography. (7/78)

The role of pyrogens in aseptic meningitis after radionuclide cisternography was studied by means of the Limulus test, a sensitive detector of endotoxin. During a 15-month period, 39 reactions associated with cisternography were reported. Ten samples of specific lots of the radioactive drugs implicated in 20 of these reactions were tested and all reacted strongly positive to the Limulus test. The less sensitive rabbit pyrogen test was negative for these preparations when tested on a dose-per-weight basis. Our findings apparently provide clinical evidence for the observation made in animals that endotoxin is at least 1,000 times more toxic intrathecally than intravenously. The data implicate endotoxin contamination as a cause of adverse reactions to radionuclide cisternography. We conclude that the USP pyrogen test is insufficiently sensitive for intrathecal injectables and should be supplemented by the Limulus test.  (+info)

Light-induced changes of sensitivity in Limulus ventral photoreceptors. (8/78)

The responses of Limulus ventral photoreceptors to brief test flashes and to longer adapting lights were measured under voltage clamp conditions. When the cell was dark adapted, there was a range of energy of the test flashes over which the peak amplitude of the responses (light-induced currents) was directly proportional to the flash energy. This was also true when test flashes were superposed on adapting stimuli but the proportionality constant (termed peak currently/photon) was reduced. The peak current/photon was attenuated more by brighter adapting stimuli than by less bright adapting stimuli. The peak current/photon is a measure of the sensitivity of the conductance-increase mechanism underlying the light response of the photo-receptor. The response elicited by an adapting stimulus had a large initial transient which declined to a smaller plateau. The peak current/photon decreased sharply during the declining phase of the transient and was relatively stable during the plateau. This indicates that the onset of light adaptation is delayed with respect to the onset of the response to the adapting stimulus. If the adaptational state just before the onset of each of a series of adapting stimuli was constant, the amplitude of the transient was a nearly linear function of intensity. When the total intensity was rapidly doubled (or halved) during a plateau response, the total current approximately doubled (or halved). We argue that the transition from transient to plateau, light-elicited changes of threshold, and the nonlinear function relating the plateau response to stimulus intensity all reflect changes of the responsiveness of the conductance-increase mechanism.  (+info)

Dunlop, J. A., L. I. Anderson, H. Kerp and H. Hass. 2004. A harvestman (Arachnida: Opiliones) from the Early Devonian Rhynie cherts, Aberdeenshire, Scotland. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 94(04): 341-354.. Giribet, G., G. D. Edgecombe, W. C. Wheeler and C. Babbitt. 2002. Phylogeny and systematic position of Opiliones: a combined analysis of chelicerate relationships using morphological and molecular data. Cladistics 18:5-70.. Giribet, G., M. Rambla, S. Carranza, J. Bagu , M. Riutort and C. Ribera. 1999. Phylogeny of the arachnid order Opiliones (Arthropoda) inferred from a combined approach of complete 18S and partial 28S ribosomal DNA sequences and morphology. Molecular Phylogenetics and Evolution 11:296 307.. Hansen, H. J. and W. S rensen. 1904. On two orders of Arachnida Opiliones, especially the suborder Cyphophthalmi, and Ricinulei, namely the family Cryptostemmatoidae. Cambridge University Press.. Martens, J. 1978. Weberknechte, Opiliones. ...
Discover Lifes page about the biology, natural history, ecology, identification and distribution of Arachnida - Spiders, Ticks, Mites, Chiggers, Scorpions, Whipscorpions, Pseudoscorpions, Daddy longlegs, Harvestmen, Arachnidae -- Discover Life
Discover Lifes page about the biology, natural history, ecology, identification and distribution of Arachnida - Spiders, Ticks, Mites, Chiggers, Scorpions, Whipscorpions, Pseudoscorpions, Daddy longlegs, Harvestmen, Arachnidae -- Discover Life
Spiders and Harvestmen. Spiders and harvestmen belong to the group (class) of invertebrates, collectively known as the Arachnida, which comprises eleven orders, of which there are four native to the UK and Yorkshire. These are the mites and ticks (Acari), false-scorpions (Pseudoscorpiones), spiders (Araneae) and harvestmen (Opiliones).. The recorders have a particular interest in, and are capable of identifying spiders and harvestmen. The former can be distinguished from harvestmen in having two obvious body segments: the cephalothorax (head) and abdomen, whilst harvestmen have a single body part. Furthermore, harvestmen have two eyes, normally raised on an ocularium (turret) which can be furnished with spines. Spiders, either have six, or more normally, eight eyes. Both of course, have eight legs.. Nationally, there are approximately 650 species of spider and 26 species of harvestmen.. For anyone interested in finding out more information on this diverse and interesting group, please visit ...
The harmless Pseudoscorpion if often found in the home where it will prey upon small insects and other arthropods. Since the Pseudoscorpion lacks venom, it is perfectly harmless and you have no cause for alarm. ...
Arachnida is a large and well-known class of 8-legged arthropods related to crustaceans and insects. Unlike insects, the body is separated into only 2 parts. The cephalothorax, also known as the prosoma, contains the mouth area as well as the chelicerae (pincers or claws used for feeding), pedipalpi (feet used to touch or capture) and 8 legs, four on either side. Arachnids lack antannae. The cephalothorax is partially or completely covered with a protective shield. The second segment is known as the abdomen or opisthosoma, and contains the rest of the body. The abdomen may lack appendages entirely, or it may have specialized appendages, such as the spinneret used to make spiderwebs. Most arachnids breath in through tracheae or book lungs.. Most arachnid species are considered to be pests or are thought to be dangerous to humans.some spiders can kill humans, but these occurrences are very rare. Scorpions are also poisonous, and ticks can spread deadly illnesses, such as lyme disease. Arachnids ...
The knowledge of cytogenetics in the harvestmen family Phalangiidae has been based on taxa from the Northern Hemisphere. We performed cytogenetic analysis on Guruia africana (Karsch, 1878) (2n=24) and four species of the genus Rhampsinitus Simon, 1879 (2n=24, 26, 34) from South Africa. Fluorescence in situ hybridization with an 18S rDNA probe was used to analyze the number and the distribution of this cluster in the family Phalangiidae for the first time. The results support the cytogenetic characteristics typical for the majority of harvestmen taxa, i.e. the predominance of small biarmed chromosomes and the absence of morphologically well-differentiated sex chromosomes as an ancestral state. We identified the number of 18S rDNA sites ranging from two in R. qachasneki Kauri, 1962 to seven in one population of R. leighi Pocock, 1903. Moreover, we found differences in the number and localization of 18S rDNA sites in R. leighi between populations from two localities and between sexes of R. capensis (Loman,
Existing knowledge on the distribution of harvestmen in the Iberian Peninsula is still very fragmented (Prieto 2003). There are biodiversity collections with more data on Iberian harvestmen, both in terms of numbers of specimens and of localities; these records are partly published for some genera (e.g., Prieto 2004, Prieto and Fernández 2007, Merino-Sáinz et al. 2013a). However, there is no dataset that allows public retrieval or use these data. Thus, only 48 records of Iberian harvestmen are available in GBIF [http://data.gbif.org, accessed on 03 July 2013: Museum of Comparative Zoology Harvard University 43 records; Museum of Zoology University of Navarra MZNA 3 records; Senckenberg Collection Arachnology SMF 2 records]. Only two other datasets in GBIF are composed exclusively of harvestmen records: the Opiliones dataset of the UK National Biodiversity Network (http://data.gbif.org/datasets/resource/854, based on Sankey 1988 and Hillyard 2005), which includes 25,486 records, and the ...
Buy Harvestmen: The Biology of Opiliones (9780674023437): NHBS - Edited By: Ricardo Pinto-da-Rocha, Glauco Machado and Gonzalo Giribet, Harvard University Press
How to Identify Arachnids of Arthropoda? How Arachnids are Classified? Systematics of Arachnida, What is an Arachnid? How to Identify Arachnids? Overview of the
Acarina or Acari are a taxon of arachnids that contains mites and ticks. The diversity of the Acari is extraordinary and its fossil history goes back to the Devonian era. Most acarines are minute to small (e.g. 0.080-1.00mm), but the giants of the Acari (some ticks and red velvet mites) may reach lengths of ten to 20 mm. It is estimated that over 50,000 species have been described (as of 1999) and that a million or more species are currently living. The study of mites and ticks is called acarology (Walter and Proctor 1999).. As members of Arachnida, mites should have a segmented body with the segments organized into two tagmata: a prosoma (cephalothorax) and an opisthosoma (abdomen). However, only the faintest traces of primary segmentation remain in mites, the prosoma and opisthosoma are insensibly fused, and a region of flexible cuticle (the cirumcapitular furrow) separates the chelicerae and pedipalps from the rest of the body. Most adult mites have four pairs of legs, like other arachnids, ...
With around 11 distinctive lineages and over 38,000 species of spiders alone, arachnids are an amazingly diverse group of invertebrates-and with names like the Goliath Bird-Eating Spider, the Tailless Whip Spider, and the Harvestman, they can be both spectacular and captivating. Most books about arachnids focus on spiders, neglecting scorpions, ticks, mites, wind spiders, and other fascinating yet poorly understood groups. This adventurous volume summarizes all existing knowledge about each major type of arachnid, revealing their secrets through detailed species accounts, brilliant photographs, and a compelling cast of eight-legged characters. It examines the anatomy, habitat, behavior and distribution of each lineage, from the garden spider to the death stalker scorpion and even a species of mite that lives inside a monkeys lungs. Drawing on the vast resources at Londons Natural History Museum, Arachnids spins a sensational tale, debunking common myths and delving deep into the lives of these bizarre
With around 11 distinctive lineages and over 38,000 species of spiders alone, arachnids are an amazingly diverse group of invertebrates-and with names like the Goliath Bird-Eating Spider, the Tailless Whip Spider, and the Harvestman, they can be both spectacular and captivating. Most books about arachnids focus on spiders, neglecting scorpions, ticks, mites, wind spiders, and other fascinating yet poorly understood groups. This adventurous volume summarizes all existing knowledge about each major type of arachnid, revealing their secrets through detailed species accounts, brilliant photographs, and a compelling cast of eight-legged characters. It examines the anatomy, habitat, behavior and distribution of each lineage, from the garden spider to the death stalker scorpion and even a species of mite that lives inside a monkeys lungs. Drawing on the vast resources at Londons Natural History Museum, Arachnids spins a sensational tale, debunking common myths and delving deep into the lives of these bizarre
Arachnids are mostly carnivorous, feeding on the pre-digested bodies of insects and other small animals. Only the harvestmen and some mites eat solid food particles. Predigestion avoids exposure to internal parasites.[5] Several groups secrete venom from specialized glands to kill prey or enemies. Several mites are external parasites, and some of them are carriers of disease (vectors). Arachnids pour digestive juices produced in their stomachs over their prey after killing it with their pedipalps and chelicerae. The digestive juices rapidly turn the prey into a broth of nutrients which the arachnid sucks into a pre-buccal cavity located immediately in front of the mouth. Behind the mouth is a muscular, pharynx, which acts as a pump, sucking the food through the mouth and on into the oesophagus and stomach. In some arachnids, the oesophagus also acts as an additional pump. ...
Arachnids are mostly carnivorous, feeding on the pre-digested bodies of insects and other small animals. Only the harvestmen and some mites eat solid food particles. Predigestion avoids exposure to internal parasites.[5] Several groups secrete venom from specialized glands to kill prey or enemies. Several mites are external parasites, and some of them are carriers of disease (vectors). Arachnids pour digestive juices produced in their stomachs over their prey after killing it with their pedipalps and chelicerae. The digestive juices rapidly turn the prey into a broth of nutrients which the arachnid sucks into a pre-buccal cavity located immediately in front of the mouth. Behind the mouth is a muscular, pharynx, which acts as a pump, sucking the food through the mouth and on into the oesophagus and stomach. In some arachnids, the oesophagus also acts as an additional pump. ...
The creatures of this order form a small group which it appears now necessary to receive among the Aracnida, though their true position has been hitherto (and to some extent still is) a matter of much difference of opinion among naturalists. They seem to connect the more typical Arachnida with the Crustacea, and also to form a passage from the Acaridea to the Phalangidea. It appears, however, when their peculiar structure, both external and internal, is considered, impossible to include them within either of those orders; it is therefore proposed here to constitute them a separate order between the acarids and phalangids. The characters of the order are ...
Establishment of new model systems is imperative for investigating the developmental basis of organismal diversity. Presently, such models are available for only two orders of Arachnida-Cupiennius salei and Parasteatoda tepidariorum (Araneae), and Archegozetes longisetosus and Tetranychus urticae (Acari). The putative clade Dromopoda uniting Scorpiones, Pseudoscorpiones, Solifugae and Opiliones is unrepresented. In order to enrich comparative developmental data for Arachnida, as well as revive embryological study of Opiliones, we investigated the eupnoid harvestman Phalangium opilio as a candidate model organism. In the present study, we sequenced a developmental transcriptome of Phalangium opilio and simultaneously developed protocols for embryo cultivation, fixation, and in situ hybridization. We present data from whole mount in situ hybridization experiments, highlighting the unique morphology of Opiliones using probes for Hox genes (e.g, Ultrabithorax) and leg gap genes (e.g., ...
Pseudoscorpions are commonly known as false scorpions or book scorpions. They belong to the Arachanida class, and, as the name suggests, they are like scorpions but without a stinger on their back end.
This dataset contains the digitized treatments in Plazi based on the original journal article Pérez-González, Abel, Sharma, Prashant P., Proud, Daniel N. (2016): Morphological tricks and blessed genitalia: rectifying the family placement of Fijicolana tuberculata (Opiliones: Laniatores: Zalmoxidae). Zootaxa 4061 (3): 253-260, DOI: http://doi.org/10.11646/zootaxa.4061.3.3 ...
Giribet, Gonzalo; Vogt, Lars; González, Abel P.érez; Sharma, Prashant; et al. (2010). A multilocus approach to harvestman (Arachnida: Opiliones) phylogeny with emphasis on biogeography and the systematics of Laniatores. Cladistics. 26 (4): 408-437. doi:10.1111/j.1096-0031.2009.00296.x. ISSN 0748-3007 ...
The journal publishes scientific articles and short communications reporting observations and data regarding the biology of arachnid groups.
Greatly reduced sperm viability caused by tetracycline passes from father to son in pseudoscorpions. In a paper published today in Natures open access journal Scientific Reports, researchers at the University of Nevada, Reno report that male pseudoscorpions treated with the antibiotic tetracycline suffer significantly reduced sperm viability and pass this toxic effect on to their untreated sons. They suggest that a similar effect could occur in humans and other species.. This is the first research to show a transgenerational effect of antibiotics, David Zeh, chair of the Department of Biology in the College of Science, said. Tetracycline has a significant detrimental effect on male reproductive function and sperm viability of pseudoscorpions - reducing viability by up to 25 percent - and now we know that effect is passed on to the next generation. We didnt see the effect in subsequent generations.. The research involved a three-generation study of the pseudoscorpion, Cordylochernes ...
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Despite their spider-like appearance and the fact that they belong to the Arachnids, harvestmen are not true spiders but belong to an order of their own known as the Opiliones, distingished from spiders by their globular bodies, unlike those of true spiders which are divided into two parts - the separate thorax and abdomen, separated by a constriction. Harvestmen always seem to have an other-worldly appearance and, scaled up to monstrous proportions, wouldnt be out of place in a science fiction movie. Many of their sensory functions are located in their legs and if you watch the way in which they use these - particularly the second pair that are often far longer than the others - its quite clear that they are using them to feel and taste their way around their habitat. Nevertheless, when danger threatens they can shed a leg (autotomy) and leave it twitching on the ground, to deflect the attention of a predator. Unlike true spiders, they cant regrow limbs after moulting, so this desperate ...
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Mites have proved to be one of the most difficult arachnid orders to place in phylogenetic studies. It has even been suggested that they are not a natural (i.e. monophyletic) group. Ongoing studies suggest that the mouthparts of mites, solifuges (camel spiders) and pseudoscorpions have similarities of the mouthparts, i.e. a kind of beak or rostrum, which have not been widely recognised as homologous, at least not in mites. The same structures appear to have been given different names within the different groups! If the mouthparts in these orders are homologous then these three orders could be interpreted as a clade ...
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New Volumes on the Minor Arachnid Orders The Biology of Camel-Spiders (Arachnida, Solifugae). written by Fred Punzo. & Whip Spiders (Chelicerata: Amblypygi). Their Biology, Morphology and Systematics. written by Peter Weygoldt ...
A close look at Solifugae of the family Mummuciidae: Emphasis on morphology & ongoing efforts to untangle the. taxonomy. ​. Speaker: Ricardo Botero-Trujillo Doctoral Fellow, División Aracnología, Museo Argentino de Ciencias Naturales Bernardino Rivadavia - CONICET, Argentina. Associate Researcher, Laboratorio de Entomología, Unidad de Ecología y Sistemática, Pontificia Universidad Javeriana, Bogotá, Colombia. Where: Kaufman Theater, AMNH, enter West 77th Street entrance. Date: Tuesday, September 13, 2016 - Please note, date is one week earlier than normal. Time: 7 PM to 8:30 PM. One of Ricardos favorite arthropods is the solifuges, arachnids commonly known as camel spiders, sun spiders, and wind scorpions. The arachnid order, Solifugae, derives from Latin, and translates to those that flee from the sun. Unfortunately, Solifugae is one of the least studied arachnid orders. Despite the common names, solifuges are not spiders (not camels, either) and not scorpions. Their unique ...
Reproductive behavior of Chavesincola inexpectabilis (Opiliones, Gonyleptidae) with description of a new and independently evolved case of paternal care in harvestmen.
Natura - nature Mundus - physical world;material world Naturalia Biota Domain Eukaryota - eukaryotes Kingdom Animalia - animals Subkingdom Bilateria - bilaterians;triploblastic animals Branch Protostomia - protostomes Infrakingdom Ecdysozoa - ecdysozoans Superphylum Panarthropoda Phylum Arthropoda - arthropods Subphylum Arachnomorpha Infraphylum Cheliceriformes Superclass Chelicerata Epiclass Euchelicerata Class Arachnida 1.5.0 [Order Amblypygi] Thorell, 1883 SF: Order Amblypygida H,N,P,R,B,L; Ref:H.W. Levi, 1982:76 ...
The highest number of individuals (n = 635, 49.8%) was sampled using sweep-netting, followed by tree beating, with which 342 individuals (26.8%) were sampled. Pantraps sampled 206 individuals (16.2%) and other methods provided 92 specimens (7.2%).. Species prevalence, rarity, endemism and habitats. Of the total number of species sampled, 35 (26.5%) occurred only in forest and 65 (49.2%) were confined to grassland. Only 32 species (24.2%) occurred in both habitat types. At one site 45 species (34.1%) were recorded, whilst 40 species (30.3%) were represented by only a single individual (singletons).. No species was sampled at all the sites and only seven species (5%) were recorded from more than 50% of the sampled sites (both forest and grassland). The most regularly collected species across sites were N. blondeli and Copa flavoplumosa Simon, 1885 (Corinnidae), which were sampled at 20 sites, Theridion sp. 1 (Theridiidae) and Clubiona sp. 3 (Clubionidae), which were collected from 17 sites, and H. ...
The abdomen is covered with a continuous integument neither annulate nor segmentate; in one species, however (before mentioned), Liphistius desultory (Schiodete), the upper side has a longitudinal series of transverse corneous plates, like those of the Phrynides; and something of a similar kind, but less marked, is observable in Tetrablemma medioculatum (Cambr.), a very rare and remarkable little spider found in Ceylon. The epidermis of the abdomen is of various kinds and consistency in different groups, sometimes excessively thin and tender, at other times tough and coriaceous, and sometimes hard and horny, with a varied armature and clothing of hairs, bristles, puberscence, tubercles, and spines, sometimes being, however, perfectly bare and glabrous; its colours, also, and the patterns produced by their distribution, vary exceedingly. Under neath the fore extremity of the abdomen are placed t he external openings to the respiratory organs; these apertures consist of a narrow slit or orifice ...
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesnt cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control. ...
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesnt cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control. ...
History, politics, arts, science & more: the Canadian Encyclopedia is your reference on Canada. Articles, timelines & resources for teachers, students & public.
Paying tribute to his father, Mac Bailey, and his familys tobacco growing heritage is what Steven Bailey, founder of Cornelius & Anthony, had in mind when he created the Daddy Mac. A rich, Brazilian wrapper surrounds an Ecuadorian binder and blended filler from Nicaragua. A complex yet well-balanced combination of spice and sweetness highlights the Daddy Mac by Cornelius & Anthony. Hand-made in Estelí, Nicaragua, the Daddy Mac comes in four vitolas: Gordo, Toro, Robusto, and Corona Gorda. A perfect smoke for any time of the day, the Cornelius & Anthony Daddy Mac is one stick you will want to keep within in reach ...
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Wir finden am Pocockschen Typus (♂, ♀) am unbeweglichen Finger 2 Zwischenz hne und am beweglichen 3 Zwischenz hne jederseits, den Metatarsus der Pedipalpen beim ♂ ventral mit Zylinderborsten besetzt und die ventrale Bedornung des 2.-4. Tarsus der Gattung Galeodellus entsprechend, also auch das letzte Glied des 4. Tarsus mit 2 Dornen besetzt. Das ♂ hat nadelf rmige Sohlenhaare am 4. Tarsus und am 6. Sternit des Opisthosoma nadelf rmige Ctenidien. Diese Befunde stimmen mit Pococks Diagnose und Hirsts Tabelle (1908), soweit sie angegeben werden, berein. Birulas Tabelle 1904 enth lt insofern einen Irrtum, als er, der afghanus nicht sah, diese Art f r die araneoides-Gruppe (also Galeodes s. str.) in Anspruch nimmt und das letzte Glied des 4. Tarsus unbedornt glaubt. - Aus Kraepelins kurzen Angaben (1901) ist f r die Stellung von afghanus nichts wesentliches zu entnehmen ...
Galeodes araneoides (Pallas): Olivier, 1791b: 579, 580; Lamarck, 1801: 176 (as aranoides [sic]); Lamarck, 1802 61 (as aranoides [sic]); Latreille, 1806: 133-136; Olivier, 1807: 443, plate 42 fig. 3; Latreille, 18lO: 425; Leach, 1814: 418; Lamarck, 1818: 79; Dumeril, 1820: 76; Duges and Edwards, 1836: plate 20 figs 1, 1a-f, plate 20 bis figs la, 1a-b; Guerin-Meneville, 1838b: 11, plate 4 figs 4a-d; Lamarck, 1838: 106-107; Lamarck, 1839: 300-301; C .L. Koch, 1842: 353; Gervais, 1844: 88, plate 26 fig. 1; C .L. Koch, 1847: 83-85, fig. 1475; C .L. Koch, 1850: 97; Dufour, 1861: 383-384; Wood, 1863: unnumbered fig. on p. 679; Butler, 1873: 418-419; Pavesi, 1876: 73; C L. Koch, 1878: 38; Simon, 1879a: 99-100; Simon, 1879c: 77; Croneberg, 1887: 163-164, figs 1-2; Pocock, 1889b: 118; Walter, 1889: 1096; Birula, 1890b: 66-68, figs 11-12; Birula, 1892: 687-688; Simon, 1892: 7; Birula, 1893: 82-87; Hansen, 1893: 185, 187; Birula, 1895a: 293-324, figs 1-12; Kraepelin, 1899a: 202; Kraepelin, 1899b: 376; ...
Q: Can someone really become allergic to meat because of an insect bite? A: From an insect bite, no (not to my knowledge). But from an arachnid bite (ticks, like spiders and scorpions, are arachnids), yes. Ticks (there are more than 800 species) sometimes carry certain bacteria, viruses and/or other substances in their saliva. These can be transferred to a persons bloodstream when the tick bites them, possibly causing diseases such as Lyme (and other Borrelia subtypes including
There is an urban legend stating that daddy long-legs spiders have the most potent venom of any spider, but that their chelicerae (fangs) are either too small or too weak to puncture human skin; the same legend is also repeated of the harvestman and crane fly, also called daddy long-legs in some locales. Indeed, pholcid spiders do have a short fang structure (called uncate). However, brown recluse spiders also have uncate fang structure, but are able to deliver medically significant bites. Either pholcid venom is not toxic to humans or there is a musculature difference between the two arachnids, with recluses, being hunting spiders, possessing stronger muscles for fang penetration.[5]. In 2004, the Discovery Channel show MythBusters set out to test the daddy long-legs myth (Season 1, Episode 13 Buried in Concrete). After measuring the spiders fangs at approximately 0.25 mm (average human skin thickness varies from about 0.5mm to 4mm), the shows host was apparently bitten, although the bite ...
Ted C. MacRae is an agricultural research entomologist with an inordinate fondness for beetles. Primary expertise includes taxonomy and host associations of wood-boring beetles, with more recent interest also in tiger beetle survey and conservation. I am currently serving as Managing Editor of the The Pan-Pacific Entomologist, Layout Editor for the journal Cicindela and Newsletter Editor for the Webster Groves Nature Study Society. Read my interview at Nature Blog Network, and visit me at these other sites:. Bikes Bugs and Bones ...
Heres the first of three lists. In case you couldnt tell by the title, the other two lists will be a drone list and a metal list. This one has records that dont fit in either of those lists. However, I couldve argued for maybe half of these showing up on the drone list, but I tried not to get too loosey goosey with my definition of drone.. Theres a ton of debuts here (6 to be exact) which is really exciting. Heres hoping they continue their genius. The reviews/descriptions are pretty short on these and will be the same on the other lists because I just dont have enough time to write 30+ full reviews. Imagine theyre just taglines or something.. Instead of uploading a song to stream for every record, I made a playlist on Spotify. Im not crazy about Spotify for a lot of reasons, but in this context, it falls short because two of the artists on this list arent on Spotify (numbers 9 and 4), so youll just have to seek those out for yourself.. Update: I added song streams for everything ...
Definition of book lung - (in a spider or other arachnid) each of a pair of respiratory organs composed of many fine lamellae. They are situated in the abdo
Spiders are arachnids. Depending on what source you look at, there are 10-12 different types of arachnids. Spiders are one type of arachnid or one order with the fancy name Araneae (pronounced a-RA-nee-ee). All arachnids have eight legs, two body parts (sometimes fused to look like one), never any antennae, and never any wings. In addition…
Blaps rynchopetera Fairmaire has long been used as a folk medicine by the Yi and Bai ethnic groups in China to treat fever, cough, gastritis, boils, and tumors. In the present study, the cytotoxicity of the defensive secretion (TDS) of B. rynchopetera against AGS Caco-2, HepG2 U251 and Bel-7402 was tested, and the results revealed that TDS had potent cytotoxicity against testing cells with IC50 values of 45.8, 17.4, 53.6, 98.4 and 23.4 μg/mL, respectively. Gas chromatography-mass spectrometry (GC-MS) analysis was employed to clarify the cytotoxic constituents in TDS of B. rynchopetera and five volatile compounds, including 2-ethyl-2,5-cyclohexadiene-1,4-dione (3, 31.00%), 1-tridecene (5, 28.02%), 2-methyl-2,5-cyclohexadiene-1,4-dione (2, 22.86%), hydroquinone (4, 1.33%), and p-benzoquinone (1, 1.01%), were identified. Chemical constituent investigation on TDS further supported the presence of 5 above compounds. A cytotoxic assay indicated that compounds 1, 2, 3 and 4 exhibited significant cytotoxicity
I have recently purchased a H.arizonensis, and use a water bowl. It never really drinks, but I still have one, in case of a food shortage or something (kind of
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Previous studies of leg injuries in harvestmen have focused on the fitness consequences for individuals that use autospasy (voluntary detachment of the leg) as
Spiders represent one of the most studied arachnid orders. They are particularly intriguing from a cytogenetic point of view, due to their complex and dynamic sex chromosome determination systems. Despite intensive research on this group, cytogenetic data from African spiders are still mostly lacking. In this study, we describe the karyotypes of 38 species of spiders belonging to 16 entelegyne families from South Africa and Namibia. In the majority of analysed families, the observed chromosome numbers and morphology (mainly acrocentric) did not deviate from the family-level cytogenetic characteristics based on material from other continents: Tetragnathidae (2n♂ = 24), Ctenidae and Oxyopidae (2n♂ = 28), Sparassidae (2n♂ = 42), Gnaphosidae, Trachelidae and Trochanteriidae (2n♂ = 22), and Salticidae (2n♂ = 28). On the other hand, we identified interspecific variability within Hersiliidae (2n♂ = 33 and 35), Oecobiidae (2n♂ = 19 and 25), Selenopidae (2n♂ = 26 and 29) and Theridiidae (2n♂ =
Abstract:Analysis by gas chromatography/mass spectrometry of the scent gland secretions of male and female Middle American burrowing pythons (Loxocemus bicolor) revealed the presence of over 300 components including cholesterol, fatty acids, glyceryl monoalkyl ethers, and alcohols. The fatty acids, over 100 of which were identified, constitute most of the compounds in the secretions and show the greatest structural diversity. They include saturated and unsaturated, unbranched and mono-, di-, and trimethyl-branched compounds ranging in carbon-chain length from 13 to 24. The glyceryl monoethers possess saturated or unsaturated, straight or methyl-branched alkyl chains ranging in carbon-chain length from 13 to 24. Alcohols, which have not previously been reported from the scent glands, possess straight, chiefly saturated carbon chains ranging in length from 13 to 24. Sex or individual differences in secretion composition were not observed. Compounds in the scent gland secretions of L. bicolor may deter
Pocock was born in Clifton, Bristol, the fourth son of Rev. Nicholas Pocock and Edith Prichard. He began showing interest in natural history at St. Edwards School, Oxford. He received tutoring in zoology from Sir Edward Poulton, and was allowed to explore comparative anatomy at the Oxford Museum. He studied biology and geology at University College, Bristol, under Conwy Lloyd Morgan and William Johnson Sollas. In 1885, he became an assistant at the Natural History Museum, and worked in the section of entomology for a year. He was put in charge of the collections of Arachnida and Myriapoda. He was also given the task to arrange the British birds collections, in the course of which he developed a lasting interest in ornithology. The 200 papers he published in his 18 years at the museum soon brought him recognition as an authority on Arachnida and Myriapoda; he described between 300 and 400 species of millipedes alone,[3] and also described the scorpion genus Brachistosternus.[4]. In 1904, he left ...
ABSTRACT. The mites of three rubber tree cultures (Cedral, Pindorama and Taquaritinga) in order to determine the abundance of populations, the richness, the diversity and the degree of similarity among the communities was studied. Twenty one species were found, five of which were common to the three cultures. The richness and the abundance were greatest at the beginning of the dry season. The composition of communities differed probably as consequence of the kind of neighboring vegetation to each area, and because of the acaricid pulverization on the culture of Taquaritinga, reductng the richness of mite species in that area. The influence of neighboring vegetation can be shown by the occurrence of Iphiseiodes zuluagui Denmark & Muma, 1972, a common species to citrus trees, on neighboring rubber trees in Taquaritinga, and Tenuipalpus heveae Baker, 1945, a common species on rubber trees, on a coffee culture neighbor to the rubber trees of Pindorama. This data suggests that mites move among ...
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Reginald Innes Pocock F.R.S.[1] (4 March 1863 - 9 August 1947) was a British zoologist.[2]. Pocock was born in Clifton, Bristol, the fourth son of Rev. Nicholas Pocock and Edith Prichard. He began showing interest in natural history at St. Edwards School, Oxford. He received tutoring in zoology from Sir Edward Poulton, and was allowed to explore comparative anatomy at the Oxford Museum. He studied biology and geology at University College, Bristol under Conwy Lloyd Morgan and William Johnson Sollas. In 1885 he became an assistant at the Natural History Museum, and worked in the section of Entomology for a year. He was put in charge of the collections of Arachnida and Myriapoda. He was also tasked with arranging the British birds collections, in the course of which he developed a lasting interest in ornithology. The 200 papers he published in his eighteen years at the museum soon brought him recognition as an authority on Arachnida and Myriapoda: he described between 300-400 species of millipede ...
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Taxa covered and relationships between the 9 tools. About mites. After the insects, mites (the subclass of the Arachnida named Acari or Acarina) are the most diverse and difficult group of arthropods encountered in quarantine. Like insects, but unlike their arachnid relatives (spiders, scorpions and the like), the feeding ecologies of mites go well beyond predation to include herbivory and parasitism. The Acari includes a host of plant parasites that can devastate crops by their feeding or by transmitting plant pathogens. Domestic and wild animals also are infested by an often bewildering diversity of parasitic mites, including those that cause debilitating disease and deformity. Even other arthropods are not immune, as the worldwide spread of the honeybee parasite varroa has demonstrated. Social insects and those that bore in timber are especially rich in associated mites and for most of these mites we have no idea what their potential impact may be if they are introduced into new ...
There are oodles of arachnids living on your eyelashes, but theyre mostly safe. Learn more about the mites that live on your lashes at HowStuffWorks.
The relationships between PCO2 and pH were determined in cell-free undiluted haemolymph of the arachnids Eurypelma californicum, Pandinus imperator and Cupiennius salei. The pH/bicarbonate diagrams and the CO2 equilibrium curves were calculated, using the Henderson­Hasselbalch equation, for haemolymph sampled at rest and during recovery from exercise. The calculations of solubility (alphaCO2) and dissociation constant (pK) were based on additional ion concentration measurements. Blood gas analyses corroborate these results: after locomotor activity, there is a metabolic acidosis linked to the accumulation of lactate in the haemolymph. The concentration of bicarbonate in the haemolymph of resting individuals is quite different in the three species and is related to the extent of post-exercise bicarbonate depletion. During early recovery, buffering in the haemolymph strongly depends upon CO2 release. Potassium and magnesium concentrations in the haemolymph increase after exercise. During ...
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Hylarana acutirostris longipes Perret, 1960, Bull. Soc. Neuchatel. Sci. Nat., 83: 97. Holotype: MHNG 986.24, by original designation. Type locality: lOuest camerounais (Bamiléké) . .. . Bangwa. Secondary homonym in Rana of Hylorana longipes Fischer, 1885, Rana fusca var. longipes Müller, 1885, and Rana longipes Hallowell, 1859.. Hylarana parkeriana longipes - Perret, 1961, Bull. Soc. Neuchatel. Sci. Nat., 84: 138. Perret, 1966, Zool. Jahrb., Jena, Abt. Syst., 93: 350.. Hylarana longipes - Joger, 1982, Bonn. Zool. Beitr., 33: 318. Schätti, Perret, and Mariaux, 2002, Cat. Comm. Types Amph. Rept. Mus. Hist. Nat. Geneve, Vers. 4.0 (Jan. 2002): 8.. Rana longipes -Perret In Frost, 1985, Amph. Species World: 501.. Rana (Hylarana) longipes - Dubois, 1987 1986, Alytes, 5: 42, by implication.. Rana (Amnirana) longipes - Dubois, 1992, Bull. Mens. Soc. Linn. Lyon, 61: 324.. Amnirana longipes - Channing, 2001, Amph. Cent. S. Afr.: 266, by implication; Fei, Ye, and Jiang, 2010, Herpetol. Sinica, 12: ...
superfamily): Arthropoda - phylum, Chelicerata - subphylum, Arachnida - class, Acari - subclass, Parasitiformes - superorder, Ixodida - order, Argasoidea - ...
Domain: Eukaryota • Regnum: Animalia • Subregnum: Eumetazoa • Cladus: Bilateria • Superphylum: Protostomia • Cladus: Ecdysozoa • Phylum: Arthropoda • Cladus: Arachnomorpha • Subphylum: Chelicerata • Classis: Arachnida • Subclassis: Acari • Superordo: Parasitiformes • Ordo: Mesostigmata (Evans, G.O. 1957)? ...
Computed tomography (CT) methods were applied to a problematic fossil spider (Arachnida: Araneae) from the historical Berendt collection of Eocene (ca. 44--4...
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Pocock, R.I. (1900). Arachnida. The Fauna of India, including Ceylon and Burma. London: W.T. Blandford. pp. xii+279. Bawaskar, ...
Arachnida. London: Taylor and Francis. p. 232. Molur, Sanjay; Daniel, B.A.; Siliwal, Manju (November 2004). "First record of ...
Arachnida. London: Taylor and Francis. pp. 259-265. Jäger, Peter (2002). "Heteropodinae: Transfers and Synonymies (Arachnida: ...
Pickard-Cambridge, O. (1895). Arachnida. Araneida. Bradley, Richard A. (2012). Common Spiders of North America. University of ...
CS1 maint: discouraged parameter (link) Pickard-Cambridge, O. (1898). Arachnida. Araneida. "Elaver" at the Encyclopedia of Life ...
Arachnida. London, pp. pp. 1-279. v t e. ...
CS1 maint: discouraged parameter (link) Pickard-Cambridge, O. (1889). Arachnida. Araneida. "Alpaida" at the Encyclopedia of ...
Arachnida. London: Taylor and Francis. p. 233. Dahl, F. (1914). "Die Gasteracanthen des Berliner Zoologischen Museums und deren ...
Arachnida. p. 158. In: "The Fauna of the Cocos-Kneeling Atoll", collected by F. Wood Jones (F. Wood Jones, ed.). Proceedings of ... "Report on the Arachnida and Myriapoda collected by the British Ornithologists' Union Expedition and the Wollaston Expedition in ... "Species of Arachnida and Myriopoda (scorpions, spiders, mites, ticks and centipedes) injurious to man". Trustees of the British ... "On a collection of Arachnida and Chilopoda made by Mr. S. A. Neave in Rhodesia, north of the Zambesi". Manchester Mem. Lit. ...
Pickard-Cambridge, Frederick O. (1897). Arachnida - Araneida and Opiliones. Biologia Centrali-Americana, Zoology. 2. London. pp ... Pickard-Cambridge, Octavius (1895). Arachnida. Araneida. Biologia Centrali-Americana, Zoology. 1. London. pp. 145-160. ... Arachnida: Araneae) Based on Three Nuclear Genes and Morphology". PLOS ONE. 7 (6): e38753. doi:10.1371/journal.pone.0038753. ...
Roth, V. D., & Brame, P. L. (1972). "Nearctic genera of the spider family Agelenidae (Arachnida, Araneida)" (PDF). American ... CS1 maint: discouraged parameter (link) Pickard-Cambridge, O. (1898). Arachnida. Araneida. ...
Arachnida). Tex. Mem. Mus., Speleol. Monogr. 4: 1-170 Savory, T., 1977. Arachnida. second edition. Academic Press inc. New York ... "Arachnida", p. 306, in: J. Cracraft (ed.) Assembling the Tree of Life, pp. 296-318 Humphreys, W.F., et al. (1989) The biology ...
"Arachnida". In Joel Cracraft & Michael J. Donoghue (eds.). Assembling the tree of life. Oxford University Press. pp. 296-318. ...
Arachnida". Lectures on Comparative Anatomy. London: Longman, Brown, Green, and Longmans. p. 252. Yong, Ed (August 31, 2012). " ...
"Arachnida". The Zoological Record. 7: 207-224. Roth, V.D.; Brown, W.L. (1975). "Comments on the spider Saltonia incerta Banks ( ...
Pocock, R. I. (1903). "Arachnida". Special Bulletin of the Liverpool Museum: 193. Santos, A.J.; Harten, A. van (2007). "On the ...
Arachnida. Raven, R. J. (1985). "The spider infraorder Mygalomorphae (Araneae): Cladistics and systematics". Bulletin of the ...
Pickard-Cambridge, O. (1889d). Arachnida. Araneida. In: Biologia Centrali-Americana, Zoology. London 1 Pickard-Cambridge, F. O ... 1904). Arachnida - Araneida and Opiliones. In: Biologia Centrali-Americana, Zoology. London 2 Simon, E. (1895a). Histoire ...
CS1 maint: discouraged parameter (link) Pickard-Cambridge, O. (1896). Arachnida. Araneida. "Ariston" at the Encyclopedia of ...
CS1 maint: discouraged parameter (link) Pickard-Cambridge, O. (1895). Arachnida. Araneida. v t e. ...
Jonathan A. Coddington; Gonzalo Giribet; Mark S. Harvey; Lorenzo Prendini; David E. Walter (2004). "Arachnida". In Joel ...
Arachnida; Acari; Parasitiformes; Ixodida; Ixodoidea D. H. Molyneux (1993). "Vectors". In Francis E. G. Cox (ed.). Modern ...
CS1 maint: discouraged parameter (link) Pickard-Cambridge, O. (1896). Arachnida. Araneida. v t e. ...
Database built by Robert J. Raven Pocock, R. I. (1903g). Arachnida. In: Forbes, H. O. (ed.) The Natural History of Sokotra and ... 473-503). Pickard-Cambridge, O. (1898b). Arachnida. In: Dixey, F., Mal Burr, & O. Pickard-Cambridge (eds.) On a collection of ...
CS1 maint: discouraged parameter (link) Strand, E. (1913). Arachnida. I. doi:10.5962/bhl.title.7048. v t e. ...
Alexander Petrunkevitch (1955). "Arachnida". In R. C. Moore (ed.). Part P, Arthropoda 2. Treatise on Invertebrate Paleontology ... Reginald Innes Pocock (1911). A Monograph of the Terrestrial Carboniferous Arachnida of Great Britain. Monographs of the ... Alexander Petrunkevitch (1949). "A study of Palaeozoic Arachnida". Transactions of the Connecticut Academy of Arts and Sciences ... Dunlop, Jason A. (2011). "A redescription of the Carboniferous arachnid Plesiosiro madeleyi Pocock, 1911 (Arachnida: Haptopoda ...
Pocock, R. I. (1903). "Arachnida". In Forbes, Henry O (ed.). The Natural History of Sokotra and Abd-el-kuri. London: R. H. ...
ISBN 978-0-643-06805-6. Engel, M.S.; Grimaldi, D.A. (2014). "Whipspiders (Arachnida: Amblypygi) in amber from the Early Eocene ... Arachnida. Weygoldt, Peter (2000). Whip Spiders (Chelicerata: Amblypygi): Their Biology, Morphology and Systematics. ISBN ... Arachnida: Amblypygi)". Journal of Zoology. 310 (1): 45-54. doi:10.1111/jzo.12726. ISSN 0952-8369. Ladle, Richard J.; Velander ... Arachnida:Amblypygi)". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 98 (2): 165-178. doi: ...
CS1 maint: discouraged parameter (link) Pickard-Cambridge, O. (1897). Arachnida. Araneida. Rengifo, Laura; Albo, Maria Jose; ...
Arachnida. II. London. pp. 356-357; Pl. 33, Figs. 16, 17.CS1 maint: postscript (link) Candia-Ramírez, Daniela T.; Valdez- ...
Class Arachnida. Arachnida is a large and well-known class of 8-legged arthropods related to crustaceans and insects. Unlike ...
... Spiders, mites, scorpions, whipscorpions, pseudoscorpions. Click on an image to view larger version & data in a new ... Arachnida Catalog. Department of Entomology, Texas A&M University. * Arachnid Origins and Evolution. Jason Dunlops home page. ... Page: Tree of Life Arachnida. Spiders, mites, scorpions, whipscorpions, pseudoscorpions. The TEXT of this page is licensed ... System and phylogeny of Arachnida (analysis of morphology of paleozoic groups) [Russian]. Paleontologicheskii Zhurnal 24:4-17. ...
... with Arachnida in one monophyletic group. Dunlop and Selden (1997) restricted this term to... ... 1993) class of Arachnida. Presently, it seems well established that the class Arachnida (Lamarck 1801) is composed of 10 recent ... Beron P. (2018) Systems of Arachnida. In: Zoogeography of Arachnida. Monographiae Biologicae, vol 94. Springer, Cham. * DOI ... Brignoli PM (1980) The evolution of the Arachnida. Bolletino di Zoologia 47(suppl):21-26CrossRefGoogle Scholar ...
Arachnida. Arachnida is a large class of chelicerate arthropods (segmented, jointed-limbed animals) including the orders ... Arachnida. Arachnida is a large class of chelicerate arthropods (segmented, jointed-limbed animals) including the orders ... Lindquist, Evert E.. "Arachnida". The Canadian Encyclopedia. Toronto: Historica Canada, 2007. Web. 15 Mar 2007. ... Evert E. Lindquist "Arachnida" The Canadian Encyclopedia. Eds. . Toronto: Historica Canada, 2007. Web. 10 Dec. 2017.. ...
The class of Arachnida is (except for the original spiders, Solifugae) organized in three major legions; out of these the ... The oldest Arachnida, original spiders (Solifugae), have, just like insects, three pairs of jaws fixed to their head: upper ... The very diverse class of spiders (Arachnida) of which more than 4000 living species and many extinct ones are known is closest ... Phylum of Articulata (Gliedertiere); - main class of Tracheata (Luftrohrtiere); - class of Arachnida (Spinnentiere).. ...
An arachnid is any member of the arthropod class Arachnida, a largely terrestrial group that includes spiders, mites, ticks, ... As members of Arachnida, mites should have a segmented body with the segments organized into two tagmata: a prosoma ( ... Maddison, D. R. Arachnida. Spiders, mites, scorpions, whipscorpions, pseudoscorpions Tree of Life Web Project, 1995. Retrieved ... for the mites and so other taxa do not have the characteristic segmented bodies of Arachnida, but are considered to have been ...
Tom Murray , profile , all galleries >> Arthropods - Arthropoda >> Arachnids - Arachnida tree view , thumbnails , slideshow ... Arachnids - Arachnida. Spiders in North America, with just a few exceptions are harmless to humans. The Widows, Recluse, and ...
Lincoln S. Rocha and Martinho C. Carvalho "DESCRIPTION AND ECOLOGY OF A NEW SOLIFUGE FROM BRAZILIAN AMAZONIA (ARACHNIDA, ... NEW SPECIES OF EREMOBATIDAE (ARACHNIDA, SOLIFUGAE) FROM NORTH AMERICA REDESCRIPTION OF METACLEOBIS FULVIPES ROEWER FROM BRAZIL ... Lincoln S. Rocha, Martinho C. Carvalho "DESCRIPTION AND ECOLOGY OF A NEW SOLIFUGE FROM BRAZILIAN AMAZONIA (ARACHNIDA, SOLIFUGAE ... DESCRIPTION AND ECOLOGY OF A NEW SOLIFUGE FROM BRAZILIAN AMAZONIA (ARACHNIDA, SOLIFUGAE, MUMMUCIIDAE). ...
Die Sektion Arachnida betreut neben den Spinnentieren auch die basalen Hexapoden (primär ungeflügelte Insekten, ... Die Sektion Arachnida betreut in kuratorischer Hinsicht neben den Spinnentieren auch die "basalen" Hexapoden (primär ...
Arachnida explanation. Define Arachnida by Websters Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal ... Arachnida - a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of ... Acarina, arachnid, arachnoid, Araneae, Araneida, Chelicerata, Chelonethida, class, class Arachnida, Opiliones, order Acarina, ... Arachnida --. Arachnidan. Arachnidial. arachnidian. Arachnidium. Arachnitis. Arachnoid. arachnoid membrane. Arachnoidal. ...
Green Lynx Spider, Peucetia viridans (Hentz) (Arachnida: Araneae: Oxyopidae)1. H. V. Weems, Jr. and W. H. Whitcomb2 ... Biologia Centrali-Americana, Arachnida, Araneidea and Opilones. Vol. 2. Published for the editors by R.H. Porters. London. 610 ... The Arachnida of Florida. Proceedings of the National Academy of Science Philadelphia 56: 120-147. ...
The abdomen is covered with a continuous integument neither annulate nor segmentate; in one species, however (before mentioned), Liphistius desultory (Schiodete), the upper side has a longitudinal series of transverse corneous plates, like those of the Phrynides; and something of a similar kind, but less marked, is observable in Tetrablemma medioculatum (Cambr.), a very rare and remarkable little spider found in Ceylon. The epidermis of the abdomen is of various kinds and consistency in different groups, sometimes excessively thin and tender, at other times tough and coriaceous, and sometimes hard and horny, with a varied armature and clothing of hairs, bristles, puberscence, tubercles, and spines, sometimes being, however, perfectly bare and glabrous; its colours, also, and the patterns produced by their distribution, vary exceedingly. Under neath the fore extremity of the abdomen are placed t he external openings to the respiratory organs; these apertures consist of a narrow slit or orifice ...
... identification and distribution of Arachnida - Spiders, Ticks, Mites, Chiggers, Scorpions, Whipscorpions, Pseudoscorpions, ... Arachnida. SPIDERS; TICKS; MITES; CHIGGERS; SCORPIONS; WHIPSCORPIONS; PSEUDOSCORPIONS; DADDY LONGLEGS; HARVESTMEN; ARACHNIDAE. ... animaldiversity.ummz.umich.edu/site/accounts/information/Arachnida.html. ...
Southern Black Widow Latrodectus mactans (Fabricius) (Arachnida: Araneae: Theridiidae)1. Amanda Eiden and Phillip E. Kaufman2 ...
As factors of distribution of Arachnida are outlined paleogeography and paleodistribution, age of groups, barriers, bridges, ... Dunlop JA, Martill DM (2002) The first whipspider (Arachnida: Amblypygi) and three new whipscorpions (Arachnida: Thelyphonida) ... Beron P. (2018) Factors Determining the Distribution of Arachnida. In: Zoogeography of Arachnida. Monographiae Biologicae, vol ... Besch W (1969) South American Arachnida. In: Fittkau EJ et al (eds) Biogeography and Ecology in South America, pp 723-740Google ...
Marcelo O. Gonzaga and João Vasconcellos-Neto "NESTING CHARACTERISTICS AND SPIDERS (ARACHNIDA: ARANEAE) CAPTURED BY AUPLOPUS ... Opinion 2326 (Case 3541) metinae Simon, 1894 (Arachnida, Araneae, tetragnathidae) ... New Faunistic Data for the Family ... NESTING CHARACTERISTICS AND SPIDERS (ARACHNIDA: ARANEAE) CAPTURED BY AUPLOPUS ARGUTUS (HYMENOPTERA: POMPILIDAE) IN AN AREA OF ... Marcelo O. Gonzaga, João Vasconcellos-Neto "NESTING CHARACTERISTICS AND SPIDERS (ARACHNIDA: ARANEAE) CAPTURED BY AUPLOPUS ...
... Platnick, Norman I.; ... A revision of the spider family Stenochilidae (Arachnida, Araneae). American Museum novitates ; no. 2556. ...
First record of Stygnidae for the state of Espírito Santo and description of a new Protimesius (Arachnida: Opiliones: ... Primeiro registro de Stygnidae para o estado do Espírito Santo e descrição de um novo Protimesius (Arachnida: Opiliones: ... Annotated catalogue of the Laniatores of the New World (Arachnida, Opiliones). Revista Ibérica de Aracnología 1: 1-337. [ Links ...
First records of the louse Solenopotes binipilosus (Insecta: Phthiraptera) and the mite Psoroptes ovis (Arachnida: Acari) from ...
Padrão de distribuição em escala meso-espacial de Pseudoscorpionida (Arachnida) em um gradiente de topografia (altitude e ... AGUIAR, N. O., 2000, Diversidade e História natural de Pseudoscorpiões (Arachnida), em floresta Primária de terra firme, no ... A medium-spatial scale distribution pattern of Pseudoscorpionida (Arachnida) in a gradient of topography (altitude and ... In: J. Adis (ed.). Amazoniaian Arachnida and Myriapoda, 590p., Pensoft Publishers, Sofia Moscow.. [ Links ]. MARQUES-FILHO, A. ...
Dippenaar-Schoeman, A.S. & Craemer, C., 2000, The South African National Survey of Arachnida, Plant Protection News 56, 11-12 ... Dippenaar, S.M., Modiba, M.A., Khoza, T.T. & Dippenaar-Schoeman, A.S., 2008, A checklist of the spiders (Arachnida, Araneae) ... Dippenaar-Schoeman, A.S. & Leroy, A., 2003, A check list of the spiders of the Kruger National Park, South Africa (Arachnida: ... Haddad, C.R. & Dippenaar-Schoeman, A.S., 2009, A checklist of the non-acarine arachnids (Chelicerata: Arachnida) of the De ...
Arachnida, order Acarina. 56-62. In CARPENTER, F. M., FOLSOM, J. W., ESSIG, E. O., KINSEY, A. C., BRUES, C. T., BOESEL, M. W. ... The Arachnida of Cambridgeshire. 192-203. In MARR, J. E. and SHIPLEY, A. E. (eds). Handbook to the natural history of ... Have mites (Acarina: Arachnida) colonized Antarctica and the islands of the Southern Ocean via air currents? Polar Record, 39, ... An oribatid mite (Arachnida: Acari) from the Oxford Clay (Jurassic: Upper Callovian) of South Cave Station Quarry, Yorkshire, ...
Arachnida: Araneae: Araneoidea) A Relimitation and Revision at the Generic Level: NHBS - Michael G Rix and Mark S Harvey, ... ZooKeys 36: The spider family Micropholcommatidae (Arachnida: Araneae: Araneoidea) A Relimitation and Revision at the Generic ...
Class Arachnida, Subphylum Chelicerata, Phylum Arthropoda. A total of 161 genera, 363 species belonging to 2 suborders and 38 ... Spider Fauna of Henan Arachnida: Araneae, This volume of animals of Henan deals with the Order Araneae, ... This volume of animals of Henan deals with the Order Araneae, Class Arachnida, Subphylum Chelicerata, Phylum Arthropoda. A ... Spider Fauna of Henan Arachnida: Araneae 河南蜘蛛志 蛛形纲:蜘蛛目 ...
Chasmataspidida are sister-group to Eurypterida + Arachnida. The monophyletic Arachnida has Scorpiones as its most basal taxon ... Chasmataspidida are sister-group to Eurypterida + Arachnida. The monophyletic Arachnida has Scorpiones as its most basal taxon ...
Characters in the book lungs of Scorpiones (Chelicerata, Arachnida) revealed by scanning electron microscopy. *Carsten Kamenz, ... Functional morphology of the respiratory organs in the cellar spider Pholcus phalangioides (Arachnida, Araneae, Pholcidae). * ... Respiratory system of arachnids I: morphology of the respiratory system of Salticus scenicus and Euophrys lanigera (Arachnida, ... Arachnida, Araneae, Salticidae).}, author={Anton Schmitz and Steven Franklin Perry}, journal={Arthropod structure & development ...
Arachnida: Opiliones: Dyspnoi and Eupnoi) are described from Bitterfeld amber, Sachsen-Anhalt, Germany deposited in the Museum ...
Grazing history influences biodiversity: a case study on ground-dwelling arachnids (Arachnida: Araneae, Opiliones) in the ... Hidden Mediterranean diversity: Assessing species taxa by molecular phylogeny within the opilionid family Trogulidae (Arachnida ...
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesnt cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control. ...
  • Arachnida is a large class of chelicerate arthropods (segmented, jointed-limbed animals) including the orders Araneae, Scorpiones, Opiliones, Pseudoscorpiones, Solifugae and the subclass Acari. (thecanadianencyclopedia.com)
  • Marcelo O. Gonzaga and João Vasconcellos-Neto "NESTING CHARACTERISTICS AND SPIDERS (ARACHNIDA: ARANEAE) CAPTURED BY AUPLOPUS ARGUTUS (HYMENOPTERA: POMPILIDAE) IN AN AREA OF ATLANTIC FOREST IN SOUTHEASTERN BRAZIL," Entomological News 117(3), 281-287, (1 May 2006). (bioone.org)
  • A revision of the spider family Stenochilidae (Arachnida, Araneae). (amnh.org)
  • This volume of animals of Henan deals with the Order Araneae, Class Arachnida, Subphylum Chelicerata, Phylum Arthropoda. (hceis.com)
  • Respiratory system of arachnids I: morphology of the respiratory system of Salticus scenicus and Euophrys lanigera (Arachnida, Araneae, Salticidae). (semanticscholar.org)
  • Spiders (Arachnida: Araneae) are a diverse and successful arthropod clade, which can be traced back ca 315 Ma to the Late Carboniferous [ 1 ]. (royalsocietypublishing.org)
  • Platnick, N.I. (1985): On the Chilean spiders of the family Palpimanidae (Arachnida, Araneae). (wikipedia.org)
  • Ralph Platen, Bodo von Broen, Andreas Herrmann, Ulrich M. Ratschker & Peter Sacher: Gesamtartenliste und Rote Liste der Webspinnen, Weberknechte und Pseudoskorpione des Landes Brandenburg (Arachnida: Araneae, Opiliones, Pseudoscorpiones) mit Angaben zur Häufigkeit und Ökologie. (wikipedia.org)
  • A phylotranscriptomic backbone of the orb-weaving spider family Araneidae (Arachnida, Araneae) supported by multiple methodological approaches. (nih.gov)
  • The very diverse class of spiders (Arachnida) of which more than 4000 living species and many extinct ones are known is closest related to the class of insects. (mediamatic.net)
  • An arachnid is any member of the arthropod class Arachnida , a largely terrestrial group that includes spiders , mites , ticks , scorpions , and harvestmen (daddy longlegs). (newworldencyclopedia.org)
  • Arachnida is one of the classes of the subphylum Chelicerata (including horseshoe crabs , sea scorpions, and sea spiders) of the phylum Arthropoda. (newworldencyclopedia.org)
  • Among the download the biology of camel spiders arachnida solifugae 1998 articles, Arthur D. Little garnered its previous flow entered by a 0,000 from the New Yorker( Kahn 1986). (foto-ambulanz.de)
  • other download the biology of camel spiders arachnida solifugae 1998: We offer derived to three strict patients who Are in the small function. (foto-ambulanz.de)
  • A taxonomic order within the class Arachnida - the tailless whip scorpions or whip spiders . (wiktionary.org)
  • Heymons ( 1901 ), the author of the term Chelicerata, united Merostomata (Eurypterids and Xiphosurans) with Arachnida in one monophyletic group. (springer.com)
  • Eskov KY, Zonshtein SL (1990) A new classification for the order Araneida (Arachnida: Chelicerata). (springer.com)
  • Mites belong in the phylum Arthropoda , subphylum Chelicerata , class Arachnida, subclass Acari. (encyclopedia.com)
  • Presently, it seems well established that the class Arachnida (Lamarck 1801 ) is composed of 10 recent orders plus 2-6 orders of "Acari" and variable number of fossil taxa. (springer.com)
  • First records of the louse Solenopotes binipilosus (Insecta: Phthiraptera) and the mite Psoroptes ovis (Arachnida: Acari) from wild southern huemul (Hippocamelus bisulcus). (biomedsearch.com)
  • Arachnid , (class Arachnida), any member of the arthropod group that includes spider s, daddy longlegs , scorpion s, and (in the subclass Acari ) the mite s and tick s, as well as lesser-known subgroups. (britannica.com)
  • Cokendolpher JC, Lee VF (1993) Catalogue of the Cyphopalpatores and bibliography of the Harvestmen (Arachnida, Opiliones) of Greenland, Canada, U.S.A., and Mexico. (springer.com)
  • Giribet G (2000) Catalogue of the Cyphophthalmi of the world (Arachnida, Opiliones). (springer.com)
  • Spinnentiere, Arachnida: Weberknechte, Opiliones. (scienceopen.com)
  • Kury, A.B. (2004) Annotated catalogue of the Laniatores of the New World (Arachnida, Opiliones). (arages.de)
  • The sensory equipment of a sandokanid: An extreme case of tarsal reduction in harvestmen (Arachnida, Opiliones, Laniatores). (nih.gov)
  • Scorpions of the Horn of Africa (Arachnida: Scorpiones). (marshall.edu)
  • A catalogue of the scorpions described from the Arab countries (1758- 1990) (Arachnida: Scorpionida). (marshall.edu)
  • 1987. Scorpions (Arachnida) from Costa Rica. (marshall.edu)
  • Scorpions of Djibouti, Eritrea, Ethiopia, and Somalia (Arachnida: Scorpiones) with a key and descriptions of three new species. (marshall.edu)
  • This waist is actually the last segment (somite) of the cephalothorax and is lost in most other members of the Arachnida (in scorpions, it is only detectable in the embryos ). (newworldencyclopedia.org)
  • Arachnids (Arachnida) belong to the arthropods (Arthropoda), which in almost all cases exhibit a segmented body with a chitinous exosceleton and in all cases segmented legs. (arages.de)
  • The importance of lineage in classification is seen in the groups included in arachnids, for the mites and so other taxa do not have the characteristic segmented bodies of Arachnida, but are considered to have been derived from early forms with segmented bodies. (newworldencyclopedia.org)
  • The South African National Survey of Arachnida was initiated in 1997 to document the diversity and distribution of arachnids in the country (Dippenaar-Schoeman & Craemer 2000). (scielo.org.za)
  • Blick, T. & Harvey, M.S. (2011) Worldwide catalogues and species numbers of the arachnid orders (Arachnida). (arages.de)
  • The monophyletic Arachnida has Scorpiones as its most basal taxon, followed by Haplocnemata (Solifugae + Pseudoscorpiones). (univ-lille1.fr)
  • Rote Liste und Gesamtartenliste der Pseudoskorpione (Arachnida: Pseudoscorpiones) Deutschlands. (callistus.de)
  • Karyotype analysis and achiasmatic meiosis in pseudoscorpions of the family Chthoniidae (Arachnida: Pseudoscorpiones). (arachnology.cz)
  • The current state of knowledge on the evolution of arachnida is regularly presented by Jason Dunlop. (arages.de)
  • It includes the class INSECTS and the subclass ARACHNIDA, many species of which are important medically as parasites or as vectors of organisms capable of causing disease in man. (fpnotebook.com)
  • Arachnida is a large and well-known class of 8-legged arthropods related to crustaceans and insects. (angelfire.com)
  • 1993) class of Arachnida. (springer.com)
  • Chasmataspidida are sister-group to Eurypterida + Arachnida. (univ-lille1.fr)
  • The Canadian Encyclopedia http://thecanadianencyclopedia.com/en/article/arachnida/ (accessed December 10, 2017). (thecanadianencyclopedia.com)
  • Evolutionary morphology and phylogeny of Arachnida. (tolweb.org)
  • System and phylogeny of Arachnida (analysis of morphology of paleozoic groups) [Russian]. (tolweb.org)
  • Instituto de Investigación de Recursos Biológicos Alexander von Humboldt publica este recurso, y está registrado en GBIF como un publicador de datos avalado por Colombian Biodiversity Information System . (biodiversidad.co)
  • Mites are small, often microscopic organisms, and belong to the subclass Acarina (along with ticks) or the class Arachnida (along with spiders). (migf.com)
  • Ticks belong to the class Arachnida, a group of arthropods including spiders and scorpions and are closely related to mites. (rangerdj.com)
  • I curate the rich holdings of the Namibian National Collection of Arachnida and Myriapoda. (solpugid.com)

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