• Arthropods form the phylum Arthropoda , which includes the insects , arachnids , myriapods, and crustaceans . (alchetron.com)
  • Insects may be found in nearly all environments, although only a small number of species reside in the oceans, which are dominated by another arthropod group, crustaceans. (meditative-philately.com)
  • Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. (absoluteastronomy.com)
  • A carapace is a dorsal section of the exoskeleton or shell in a number of animal groups, including arthropods such as crustaceans and arachnids, as well as vertebrates such as turtles and tortoises. (absoluteastronomy.com)
  • A clade, species, or lineage that appears at the tip of a phylogenetic tree. (berkeley.edu)
  • Estimates of the number of arthropod species vary between 1,170,000 and 5 to 10 million and account for over 80% of all known living animal species. (alchetron.com)
  • A clade shows a grouping with a single common ancestor and all descendants of that original species. (coursehero.com)
  • A more inclusive clade could show all species or genera that produce offspring with an egg that does not dry out, called an amniotic egg, thus including primates, rodents, crocodiles, and birds. (coursehero.com)
  • The author had the opportunity to investigate the material on Anillini from the New Zealand Arthropod Collection and the private collection of JT Nunn, whose numerous collecting methods included a soil-washing technique that greatly enriched the number of subterranean species available for study. (pensoft.net)
  • They are an extraordinarily successful group of arthropods that live on every continent besides Antarctica (so, if you really want to avoid them, go there) and are the seventh most diverse order on the planet, with over 45,000 different species known to man. (koryoswrites.com)
  • [2] The number of legs in this clade varies within species and ranges from 43 to 153 pairs of legs. (eol.org)
  • They form a clade, Anthophila, meaning that all bee species have a common ancestor from which they have descended. (kidadl.com)
  • Based on their preocular position and putative protocerebral origin, the frontal appendages are generally though to be homologous to the labrum of euarthropods and primary antennae of onychophoran, while subsequent evidence also suggest a deutocerebral origin (homologous to the jaws of onychophora and great appendages/antennae/chelicerae of euarthropods). (wikipedia.org)
  • An arthropod (from Greek arthro- , joint + podos , foot) is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages (paired appendages ). (alchetron.com)
  • The arthropod body plan consists of segments, each with a pair of appendages. (alchetron.com)
  • Antennae - (singular antenna) are sensory appendages attached to the head of some adult insects. (butterflyspeciesgalleries.com)
  • Antennae in biology have historically been paired appendages used for sensing in arthropods. (absoluteastronomy.com)
  • Insects or Insecta (from Latin insectum) are hexapod invertebrates and the largest group within the arthropod phylum. (meditative-philately.com)
  • Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. (meditative-philately.com)
  • u003c\/p\u003e\n\u003cp\u003eButterflies are insects in the macrolepidopteran clade Rhopalocera from the order Lepidoptera, which also includes moths. (meditative-philately.com)
  • Butterflies are insects in the macrolepidopteran clade Rhopalocera from the order Lepidoptera, which also includes moths. (meditative-philately.com)
  • Although some authors may rather suggest different taxonomic affinities (e.g. as cycloneuralian relatives), most of the phylogenetic studies suggest that dinocaridids are stem group arthropods. (wikipedia.org)
  • Phylogenetic analysis suggests that the traditional Papilionoidea is paraphyletic with respect to the other two groups, so they should both be included within Papilionoidea, to form a single butterfly group, thereby synonymous with the clade Rhopalocera . (thebiofiles.com)
  • Studies on early neurogenesis have had considerable impact on the discussion of the phylogenetic relationships of arthropods, having revealed striking similarities and differences between the major lineages. (biomedcentral.com)
  • Nervous system development and adult neuroanatomy of arthropods provide 'a wealth of valuable characters that can be used for phylogenetic inferences' [ 1 ]. (biomedcentral.com)
  • The group is generally regarded as monophyletic, and many analyses support the placement of arthropods with cycloneuralians (or their constituent clades) in a superphylum Ecdysozoa. (alchetron.com)
  • Dignathodontidae is a monophyletic clade of soil centipedes in the family Geophilidae [1] found in the Mediterranean region, extending to Macaronesia , Caucasus , and western and central Europe. (eol.org)
  • These trilobite-like arthropods demonstrate that the group from which trilobites arose was itself successful and diverse, though being uncalcified, are only preserved at exceptional lagerstatten such as the Burgess Shale and Chengjiang. (trilobites.info)
  • En mayo de 2007 obtuve el Certificate of Training in Molecular Biological Techniques en el Department of Molecular Biology y desde Junio de 2008 a Junio de 2009 completé el Certificate in Clinical Research en el Center for Translational Science Activities en Mayo Clinic College of Medicine, Rochester Minnesota. (unav.edu)
  • Some trilobite specimens from the Burgess Shale have their soft parts preserved, such as antennae and limbs, as is apparent in the remarkable Olenoides serratus specimen above. (trilobites.info)
  • Arthropods are characterized by their jointed limbs and cuticle made of chitin , often mineralised with calcium carbonate . (alchetron.com)
  • Arthropod hatchlings vary from miniature adults to grubs and caterpillars that lack jointed limbs and eventually undergo a total metamorphosis to produce the adult form. (alchetron.com)
  • Arthropods are invertebrates with segmented bodies and jointed limbs. (alchetron.com)
  • Arthropods - a group of animals with exoskeletons made of chitin, segmented bodies and jointed limbs. (butterflyspeciesgalleries.com)
  • while Opabiniidae and Radiodonta are more derived and closely related to the arthropod crown group, with the latter even having significant arthropod affinities such as arthropodization and head sclerites. (wikipedia.org)
  • To further test this hypothesis, we investigated neurogenesis in Pycnogonida, or sea spiders, a group of marine arthropods with close affinities to euchelicerates. (biomedcentral.com)
  • Dinocaridida is a proposed fossil taxon of basal arthropods that flourished in the Cambrian period with occasional Ordovician and Devonian records. (wikipedia.org)
  • The mandible (from Latin: mandibula or mandĭbŭ-lum, a jaw) of an arthropod is a pair of mouthparts used either for biting or cutting and holding food. (wikipedia.org)
  • for example, antennae and mouthparts. (coursehero.com)
  • The animal clade containing vertebrates with sturdy legs (as opposed to fins). (berkeley.edu)
  • Like their exteriors, the internal organs of arthropods are generally built of repeated segments. (alchetron.com)
  • [7] They have large compound eyes and clubbed antennae with seven to eleven segments. (wikipedia.org)
  • Antennae with 9 segments, with a 3-segmented club. (fieldofscience.com)
  • Pristomyrmex is a Palaeotropical genus of medium-sized ants with a round head bearing several denticles on the anterior margin of the clypeus, and eleven-segmented antennae in the female castes with a three-segmented club (Yamane & Terayama 1999). (fieldofscience.com)
  • Under this scenario, Dinocaridida is a paraphyletic grade in correspond to the arthropod crown group (Euarthropoda or Deuteropoda) and also suggest a lobopodian origin of the arthropod lineage. (wikipedia.org)
  • In fact, the nervous system has been considered 'a particularly suitable organ in which to search for characters to reconstruct evolutionary relationships between the major arthropod groups' [ 2 ]. (biomedcentral.com)
  • Arthropods range in size from the microscopic crustacean Stygotantulus up to the Japanese spider crab . (alchetron.com)
  • Clade - a group of all the organisms that share a particular common ancestor (and therefore have similar features). (butterflyspeciesgalleries.com)
  • Members of a clade may or may not be from the same family or genera. (coursehero.com)
  • Mandibulates also differ by having antennae, and also by having three distinct body regions: head, thorax and abdomen. (wikipedia.org)
  • The antennae are not as enlarged as in spiny and slipper lobsters, and the body is covered in short hairs, hence the name furry lobster. (absoluteastronomy.com)
  • MOTH is defined as typically crepuscular or nocturnal insect having a stout body and feathery or hairlike antennae. (spellingbeetimes.com)
  • These groups make up the clade Mandibulata, which is currently believed to be the sister group to the rest of arthropods, the clade Arachnomorpha (Chelicerata and Trilobita). (wikipedia.org)
  • Likewise, the relationships between various arthropod groups are still actively debated. (alchetron.com)
  • The developmental processes of early neurogenesis show distinct features in the major arthropod groups. (biomedcentral.com)
  • combines features of central nervous system development that have been hitherto described separately in different arthropod taxa. (biomedcentral.com)
  • The basic architecture of the arthropod central nervous system is most evident during embryonic development. (biomedcentral.com)
  • The members of a clade are related to each other. (butterflyspeciesgalleries.com)
  • Members include Mayriella , an Indo-Australian genus characterised by deep, elongate antennal scrobes capable of accomodating the entirety of the antenna, together with elongate eyes with a narrow, oblique lower section (Heterick 2009). (fieldofscience.com)
  • A clade is a taxonomic group that includes an ancestor and all of its descendants. (coursehero.com)
  • The bdelloid rotifers, which account for around a quarter of the roughly 2000 described rotifers (Segers 2008), have attracted particular attention from researchers because the bdelloid clade is the most ancient group of animals known in which males are unknown and reproduction is strictly parthenogenetic (i.e., eggs develop without fertilization). (eol.org)
  • The second antennae are the slipper lobsters' most conspicuous feature, as they are expanded and flattened into large plates that extend horizontally forward from the animal's head. (absoluteastronomy.com)
  • Arthropods contribute to the human food supply both directly as food, and more importantly as pollinators of crops. (alchetron.com)
  • Almost all arthropods lay eggs, but scorpions give birth to live young after the eggs have hatched inside the mother. (alchetron.com)
  • The respiratory and excretory systems of arthropods vary, depending as much on their environment as on the subphylum to which they belong. (alchetron.com)
  • The first antennae, or antennules , are held on a long flexible stalk, and are used for sensing the environment. (absoluteastronomy.com)
  • The "Evolution" of Anomalocaris and Its Classification in the Arthropod Class Dinocarida (nov.) and Order Radiodonta (nov. (wikipedia.org)
  • To acknowledge this, we present two possible scenarios on the evolution of arthropod neurogenesis, whereby Myriapoda play a key role in the resolution of this issue. (biomedcentral.com)