A class in the phylum MOLLUSCA comprised of SQUID; CUTTLEFISH; OCTOPUS; and NAUTILUS. These marine animals are the most highly organized of all the mollusks.
The sole genus in the family Nautilidae, order Nautilida, comprised of CEPHALOPODS with spiral external shells that are separated into chambers.
A superorder in the class CEPHALOPODA, consisting of the orders Octopoda (octopus) with over 200 species and Vampyromorpha with a single species. The latter is a phylogenetic relic but holds the key to the origins of Octopoda.
A genus of cuttlefish in the family Sepiidae. They live in tropical, subtropical and temperate waters in most oceans.
A phylum of the kingdom Metazoa. Mollusca have soft, unsegmented bodies with an anterior head, a dorsal visceral mass, and a ventral foot. Most are encased in a protective calcareous shell. It includes the classes GASTROPODA; BIVALVIA; CEPHALOPODA; Aplacophora; Scaphopoda; Polyplacophora; and Monoplacophora.
A superorder of CEPHALOPODS comprised of squid, cuttlefish, and their relatives. Their distinguishing feature is the modification of their fourth pair of arms into tentacles, resulting in 10 limbs.
Organs and other anatomical structures of non-human vertebrate and invertebrate animals.
The relationships of groups of organisms as reflected by their genetic makeup.
A copper-containing dye used as a gelling agent for lubricants, for staining of bacteria and for the dyeing of histiocytes and fibroblasts in vivo.
Glands that secrete SALIVA in the MOUTH. There are three pairs of salivary glands (PAROTID GLAND; SUBLINGUAL GLAND; SUBMANDIBULAR GLAND).
Tumors or cancer of the DIGESTIVE SYSTEM.
Diseases in any part of the GASTROINTESTINAL TRACT or the accessory organs (LIVER; BILIARY TRACT; PANCREAS).
Marine ridges composed of living CORALS, coral skeletons, calcareous algae, and other organisms, mixed with minerals and organic matter. They are found most commonly in tropical waters and support other animal and plant life.
A class in the phylum CNIDARIA, comprised mostly of corals and anemones. All members occur only as polyps; the medusa stage is completely absent.
A colloidal system of semisolid hydrocarbons obtained from PETROLEUM. It is used as an ointment base, topical protectant, and lubricant.
Places for cultivation and harvesting of fish, particularly in sea waters. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

A tyrosine-rich domain within homeodomain transcription factor Nkx2-5 is an essential element in the early cardiac transcriptional regulatory machinery. (1/33)

Homeodomain factor Nkx2-5 is a central component of the transcription factor network that guides cardiac development; in humans, mutations in NKX2.5 lead to congenital heart disease (CHD). We have genetically defined a novel conserved tyrosine-rich domain (YRD) within Nkx2-5 that has co-evolved with its homeodomain. Mutation of the YRD did not affect DNA binding and only slightly diminished transcriptional activity of Nkx2-5 in a context-specific manner in vitro. However, the YRD was absolutely essential for the function of Nkx2-5 in cardiogenesis during ES cell differentiation and in the developing embryo. Furthermore, heterozygous mutation of all nine tyrosines to alanine created an allele with a strong dominant-negative-like activity in vivo: ES cell<-->embryo chimaeras bearing the heterozygous mutation died before term with cardiac malformations similar to the more severe anomalies seen in NKX2.5 mutant families. These studies suggest a functional interdependence between the NK2 class homeodomain and YRD in cardiac development and evolution, and establish a new model for analysis of Nkx2-5 function in CHD.  (+info)

On the depth and scale of metabolic rate variation: scaling of oxygen consumption rates and enzymatic activity in the Class Cephalopoda (Mollusca). (2/33)

Recent ecological theory depends, for predictive power, on the apparent similarity of metabolic rates within broad taxonomic or functional groups of organisms (e.g. invertebrates or ectotherms). Such metabolic commonality is challenged here, as I demonstrate more than 200-fold variation in metabolic rates independent of body mass and temperature in a single class of animals, the Cephalopoda, over seven orders of magnitude size range. I further demonstrate wide variation in the slopes of metabolic scaling curves. The observed variation in metabolism reflects differential selection among species for locomotory capacity rather than mass or temperature constraints. Such selection is highest among epipelagic squids (Lolignidae and Ommastrephidae) that, as adults, have temperature-corrected metabolic rates higher than mammals of similar size.  (+info)

A model biological neural network: the cephalopod vestibular system. (3/33)

Artificial neural networks (ANNs) have become increasingly sophisticated and are widely used for the extraction of patterns or meaning from complicated or imprecise datasets. At the same time, our knowledge of the biological systems that inspired these ANNs has also progressed and a range of model systems are emerging where there is detailed information not only on the architecture and components of the system but also on their ontogeny, plasticity and the adaptive characteristics of their interconnections. We describe here a biological neural network contained in the cephalopod statocysts; the statocysts are analogous to the vertebrae vestibular system and provide the animal with sensory information on its orientation and movements in space. The statocyst network comprises only a small number of cells, made up of just three classes of neurons but, in combination with the large efferent innervation from the brain, forms an 'active' sense organs that uses feedback and feed-forward mechanisms to alter and dynamically modulate the activity within cells and how the various components are interconnected. The neurons are fully accessible to physiological investigation and the system provides an excellent model for describing the mechanisms underlying the operation of a sophisticated neural network.  (+info)

Ethics and invertebrates: a cephalopod perspective. (4/33)

This paper first explores 3 philosophical bases for attitudes to invertebrates, Contractarian/Kantian, Utilitarian, and Rights-based, and what they lead us to conclude about how we use and care for these animals. We next discuss the problems of evaluating pain and suffering in invertebrates, pointing out that physiological responses to stress are widely similar across the animal kingdom and that most animals show behavioral responses to potentially painful stimuli. Since cephalopods are often used as a test group for consideration of pain, distress and proper conditions for captivity and handling, we evaluate their behavioral and cognitive capacities. Given these capacities, we then discuss practical issues: minimization of their pain and suffering during harvesting for food; ensuring that captive cephalopods are properly cared for, stimulated and allowed to live as full a life as possible; and, lastly, working for their conservation.  (+info)

Cephalopod dynamic camouflage: bridging the continuum between background matching and disruptive coloration. (5/33)

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Mechanisms and behavioural functions of structural coloration in cephalopods. (6/33)

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Stable isotopes document the trophic structure of a deep-sea cephalopod assemblage including giant octopod and giant squid. (7/33)

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Do cephalopods communicate using polarized light reflections from their skin? (8/33)

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According to most specialists, the dearth of information on oceanic cephalopods reflects the inability of present day sampling equipments to catch them, since stomach content analyses of their predators suggest that they are very abundant along the water column. Stomach analyses, however, have an important inherent problem that should be taken into account when addressing this hypothesis. Cephalopod flesh digests more quickly than fish flesh and, in most cases, the identification of cephalopod remains is done from beaks, which are difficult to digest and may accumulate for long times in the stomachs. Such beak accumulations obviously bring forth an overestimation of the importance of cephalopods in the predators diet. With the expectation of determining if pelagic cephalopod abundances in the Mediterranean are in agreement with inferences from teutophagous predators diet, we analysed the structure and dynamics of cephalopod assemblages at different bathymetric strata from the surface to bottom ...
Ammonoid: Ammonoid, any of a group of extinct cephalopods (of the phylum Mollusca), forms related to the modern pearly nautilus (Nautilus), that are frequently found as fossils in marine rocks dating from the Devonian Period (began 419 million years ago) to the Cretaceous Period (ended 66 million years ago).
Within the Mollusca, cephalopods diverged from a monoplacophoran-like ancestor over 500 million years ago, later branching into the extant clades Nautiloidea (Nautilus and Allonautilus) and Coleoidea (squid, cuttlefish and octopus) [2,42-44]. The CephSeq Consortium has come together with the intention of using strategic genomic and transcriptomic sequencing of key cephalopod species to address previously unanswerable questions about this group. Taking into account the challenges of cephalopod genome sequencing, as well as the necessity to address nodal taxa, we have identified a set of species on which to focus our initial efforts. Selected species have been chosen based on the curiosity of their biological features as well as the possible advantages of their practical use. These species also cover ecologically diverse life histories, representing benthic, nectobenthic and nectonic animals.. Cephalopods are animals with advanced cognitive skills and a complex repertoire of behavioral abilities ...
As a squid biologist, I have always been a huge fan of living cephalopods, but their shelled ancestors never piqued my interest before I picked up Danna Staafs Squid Empire. Thanks, in part, to her unbridled enthusiasm, by the end of the book, I found myself actively rooting for animals that I had previously only thought about as fossils.. Early cephalopods used horn-shaped chambered shells to control their buoyancy, allowing them to bob and float above the seafloor. The resulting mobility allowed them to evade predators and capture prey. With an abundant amount of food available and a lack of competition, cephalopods flourished, growing to enormous sizes. (Fossils as long as 3.5 meters dating from the Ordovician have been discovered in Iowa.). Cephalopod evolution is a fantastic subject for lovers of drama: The moment the protagonist appears to be done for, a narrow escape ensues. When fishes developed jaws, cephalopods countered with beaks. When fishes became faster swimmers, cephalopods ...
A two day workshop on Southern Ocean cephalopods was held in Hobart, Tasmania, Australia prior to the triennial 2006 Cephalopod International Advisory Council (CIAC) symposium. The workshop provided a second international forum to present the current state of research and new directions since the last Southern Ocean cephalopod meeting held in 1993. A major focus of the workshop was trophic ecology and the use of a variety of tools that can be applied in Southern Ocean trophic studies for both cephalopod and predator researchers. New tools that are being used as trophic indicators and tracers in food chain pathways include stable isotope, heavy metal and fatty acid signature analysis. Progress is also being made on understanding squid population dynamics in relation to other key components of the ecosystem by incorporating squid data in ecosystem models. Genetic barcoding is now of great value to fish taxonomy as well as other groups and it is expected that a cephalopod barcoding initiative will ...
TY - CHAP. T1 - Environmental Effects on Cephalopod Population Dynamics. T2 - Implications for Management of Fisheries. AU - Rodhouse, Paul G. K.. AU - Pierce, Graham J.. AU - Nichols, Owen C.. AU - Sauer, Warwick H. H.. AU - Arkhipkin, Alexander I.. AU - Laptikhovsky, Vladimir V.. AU - Lipinski, Marek R.. AU - Ramos, Jorge E.. AU - Gras, Michael. AU - Kidokoro, Hideaki. AU - Sadayasu, Kazuhiro. AU - Pereira, Joao. AU - Lefkaditou, Evgenia. AU - Pita, Cristina. AU - Gasalla, Maria. AU - Haimovici, Manuel. AU - Sakai, Mitsuo. AU - Downey, Nicola. PY - 2014. Y1 - 2014. N2 - Cephalopods are a relatively small class of molluscs (similar to 800 species), but they support some large industrial scale fisheries and numerous small-scale, local, artisanal fisheries. For several decades, landings of cephalopods globally have grown against a background of total finfish landings levelling off and then declining. There is now evidence that in recent years, growth in cephalopod landings has declined. The ...
Guerra, A. 1992. Mollusca, Cephalopoda. In: Ramos, MA et al., (eds). Fauna Ib rica, Vol1. Museo Nacional de Ciencias Naturales. CSIC. Madrid, 327 pp.. Guerra, A. 2012. CEPHSTOCK (Cephalopod Stocks in European Waters. Review, Analysis, Assessment and Sustainable Management). ICES Working Group on cephalopods. In press.. Jereb, P. and Roper, C.F.E. (Eds.) 2005. Cephalopod of the world. An annotated and illustrated catalogue of cephalopod species known to date. Vol 1. Chambered nautiluses and sepioids. FAO Species Catalogue for Fishery Purposes No 4, Vol. 1, Rome, FAO.. Rodrigues, M, Garci, M.E., Guerra A and Troncoso, J.S. 2009. Mating behaviour of the Atlantic bobtail squid Sepiola atlantica (Cephalopoda: Sepiolidae). Vie et Milieu, 59: 1-5. Rodrigues, M., Garc , M. E., Troncoso, J. S. and Guerra, A. 2011. Spawning strategy in Atlantic bobtail squid Sepiola atlantica (Cephalopoda: Sepiolidae). Helgoland Marine Research, 65: 43-49. Rodrigues, M, Garc , M.E., Troncoso, J.S. and Guerra, A. 2011. ...
PBS has a great video up about the evolution of camera eyes, from their documentary, Evolution: Darwins Dangerous Idea. Using a synthetic optical demonstration and examples from nature, Dan-Eric Nilsson describes some of the selectable gradations between a flat patch of photosensitive cells and a fully functional camera eye. Camera eyes, also called simple lens…
An exceptionally well-preserved fauna from a new exposure in the Peterborough Member (Oxford Clay Formation) of southern England, equivalent to the famous and now inaccessible Lagerstatte at Christian Malford, Wiltshire, is described. It comes from a single bed and includes coleoid cephalopods with phosphatized soft tissues, and fully articulated fish. The level is unusual in that it lacks permanent benthos and is dominated by rain-out from the upper water column. It was deposited on a sea floor that experienced prolonged periods of anoxia and which was overlain by a water column that was at least intermittently stratified. It is postulated that the coleoids formed large shoals that were killed en masse, together with other elements of the associated fauna, in one or more catastrophic mass mortality events that affected a significant area of the Peterborough Member sea. During the event(s), many of the coleoids preyed upon moribund fish and other coleoids, sometimes of the same species, before ...
The traditional view of cephalopod evolution holds that they evolved in the Late Cambrian from a monoplacophoran-like ancestor[88] with a curved, tapering shell,[89] which was closely related to the gastropods (snails).[90] The similarity of the early shelled cephalopod Plectronoceras to some gastropods was used in support of this view. The development of a siphuncle would have allowed the shells of these early forms to become gas-filled (thus buoyant) in order to support them and keep the shells upright while the animal crawled along the floor, and separated the true cephalopods from putative ancestors such as Knightoconus, which lacked a siphuncle.[90] Neutral or positive buoyancy (i.e. the ability to float) would have come later, followed by swimming in the Plectronocerida and eventually jet propulsion in more derived cephalopods.[91]. However, some morphological evidence is difficult to reconcile with this view, and the redescription of Nectocaris pteryx, which did not have a shell and ...
The puzzle features a photograph of an Ammonite fossil. Ammonites are extinct cephalopods related to octopi and squid which roamed the seas from 200 million years ago to 66 million years ago. As they grew, they added more chambers onto their shell, creating a spiral. The ammonite inhabited the largest chamber and filled the rest with buoyant fluid. Their fossils feature beautiful and intricate suture patterns where the walls of their shell meet the outside. The branchy shapes of the pieces are based on these patterns. WHIMSY ...
Lindgren, A.R. 2010. Systematics and distribution of the squid genus Pterygioteuthis (Cephalopoda: Oegopsida) in the eastern tropical Pacific Ocean. Nesis, K.N. 1973. Cephalopods of the eastern equatorial and south-eastern Pacific Ocean (in Russian). In: English translations of selected publications on Cephalopods by Kir Nesis. Vol. I (M.J. Sweeney, compiler), pp. 171-248. Smithsonian Institution Libraries, Aad Publications, Karachi.. Okutani, T. 1974. Epipelagic decapod cephalopods collected by midwater tows during the EASTROPAC Expedition, 1967-1968 (systematic part). Bull. Tokai Reg. Fisheries Res. Lab. 80:29-118.. Pfeffer, G. 1912. Die Cephalopoden der Plankton-Expedition. Ergebnisse der Plankton-Expedition der Humboldt-Stiftung. 2: 1-815.. Riddell, D.J. 1985. Enoploteuthidae of the New Zealand Region. Fish. Res. Bull., New Zealand. 27:1-52.. Young, R.E. 1972. The systematics and areal distribution of pelagic cephalopods from the seas off southern California. Smith. Contr. Zool. ...
Examples of cephalopds Pain in cephalopods is a contentious issue. Pain is a complex mental state, with a distinct perceptual quality but also associated with suffering, which is an emotional state. Because of this complexity, the presence of pain in non-human animals, or another human for that matter, cannot be determined unambiguously using observational methods, but the conclusion that animals experience pain is often inferred on the basis of likely presence of phenomenal consciousness which is deduced from comparative brain physiology as well as physical and behavioural reactions. Cephalopods are complex invertebrates, often considered to be more advanced than other invertebrates. They fulfill several criteria proposed as indicating that non-human animals may be capable of perceiving pain. These fulfilled criteria include having a suitable nervous system and sensory receptors, opioid receptors, reduced responses to noxious stimuli when given analgesics and local anaesthetics used for ...
Here we present evidence for a semi-sessile early juvenile stage of ammonites. Our hypothesis is based on fossil evidence in early diagenetic limestone concretions discovered in platy limestone deposits of Cenomanian age in the northern state of Coahuila, Mexico. In these locations densely packed post-embryonic shell assemblages were attached to fossilized algal or bacterial mats and preserved in sediments deposited under permanently anoxic bottom conditions. Tiny ammonites, as well as gastropods and byssate pectinid bivalves are abundant and restricted to these mats. They do not occur elsewhere in the sediment. The ammonite hatchlings were apparently unable to escape from mats sinking to the hostile sea floor and must thus have been semi-sessile, similar to the associated gastropods and bivalves ...
Is the Casper octopod at risk from underwater mining? Learn more about the Casper octopod and the risk mining poses in this HowStuffWorks Now article.
by Matthew Cobb Last year we discussed one of the questions I routinely ask my students - why are there no insects in the sea? Todays poser is a question a student, Xaali, recently asked me: Why are there no freshwater cephalopods? Now I dont know much about molluscs (arthropods are more my bag), but the…
additional source Norman M.D. & Finn J.K. (2014). Family Vampyroteuthidae. pp. 268-270, in P. Jereb, C.F.E. Roper, M.D. Norman & J.K. Finn eds. Cephalopods of the world. An annotated and illustrated catalogue of cephalopod species known to date. Volume 3. Octopods and Vampire Squids. FAO Species Catalogue for Fishery Purposes [Rome, FAO]. 4(3): 353 pp. 11 pls ...
Finn J.K. (2014). Family Tremoctopodidae. pp. 240-243, in P. Jereb, C.F.E. Roper, M.D. Norman & J.K Finn eds. ,i,Cephalopods of the world. An annotated and illustrated catalogue of cephalopod species known to date,/i,. Volume 3. Octopods and Vampire Squids. ,em,FAO Species Catalogue for Fishery Purposes [Rome, FAO].,/em, 4(3): 353 pp. 11 pls ...
Well, back in 1954 two well-known cephalopod paleontologists, John B. Reeside and William A. Cobban (one prominent then, and one then becoming prominent), postulated that concretions in the Mowry and Aspen Shales were possibly fecal matter of some large carnivore--reptile, fish or cephalopod, and The diet of the carnivore would have had to be almost entirely ammonites and fish, and the carnivore would perhaps, like the living octopus, have had to frequent a sort of lair, to which it repaired and in which the mucous-bound fecal matter could accumulate (Reeside & Cobban 1954, 1960 ...
ABSTRACT. A new heteromorph ammonite genus, Tarrantites, is proposed for Hamites adkinsi Scott, 1928. The description of the new genus is based mainly on a near-complete specimen from the Middle Albian part of the Goodland Limestone of Tarrant County, Texas, the holotype, and on an abraded mould on a pebble from the bed of a stream in Hill County, Texas. In addition, we record the presence of the genus in the Albian of Pakistan. Tarrantites shows a remarkable resemblance to the labeceratine genera Labeceras Spath, 1925 and Myloceras Spath, 1925: in coiling and size to the former, and in ornamentation to the latter, but is excluded from the subfamily Labeceratinae Spath, 1925, because it has a distinct bifid adventive (A) lobe. This latter feature, and the ornamentation, rather suggest affinities of Tarrantites with the family Anisoceratidae Hyatt, 1900.. Keywords: Albian, heteromorph ammonite, Tarrantites, Anisoceratidae, labeceratine homoeomorph, Texas, Pakistan.. ...
ABOUT THIS ITEM ================= Dynamite! This Ammonite is for you! Look at that Center! Cant take your eyes off that fantastic Ammonite Fossil center. The color pallet of browns and soft yellows are perfect for a basket. The 6 Black Walnut slices in a triangular shape adds texture to this
3.9 Inch Ammonite With Oak Leaf Sutures (Item #1063), Whole Madagascar Ammonites for sale. FossilEra your source to quality fossil specimens.
Plectronoceras in an excellent place to start, even for the whole shabang, being the oldest known cephalopod, known from as early as the Franconian, lower Yenchou, of China. I added the Ellesmerocerida which are the root stock of all post Cambrian cephalopods. The Endocerida and Actinocerida are shown slightly differently to allow for the added Orthocerida. All three are independently derived from the Ellesmerocerida. The Orthocerida provides a place for the Bactrida to attach. Stemming from the Bactida are three independent groups, the Ammonidea, Aulacocerida (Belemnoidea) , and Coleoidea. The line of direct decent from the Ellesmerocerida continues to the Nautilida, which along with the Coleoidea contains the most recent cephalopods ...
Ammonoid evolutionary changes have long been recognized to be excellent time markers. They are the major macrofossil group to date and correlate Paleozoic and Mesozoic marine strata. Originations and...
Its common to hear artists say they burn the midnight oil or come alive once the clock hits 12:00 a.m. but I rarely hear anyone say, Thats awesome or Thats so healthy for you! Like many of my colleagues, at The Cameras Eye Studio I work late into the wee hours of the night and I…
There are currently some interesting discrepancies between the AWA and the A(SP)A. The AWA applies only to (non-human) vertebrates. In contrast, the A(SP)A, as it was amended in 2012 to bring it into line with European legislation, applies to (non-human) vertebrates, and to any living cephalopod not in its embryonic form (cephalopods are invertebrates). Furthermore, whereas the AWA does not apply to animals in their foetal or embryonic form, the A(SP)A does apply to mammals, birds or reptiles in the last third of gestation or incubation, and to other foetal, larval or embryonic forms once they become capable of independent feeding. The sentience-based protections given by the A(SP)A are currently more wide-reaching than those provided by the AWA. The provision already exists in section 1 (3, 4) of the AWA for the national authority to widen the scope of the animals being protected if it is satisfied, on the basis of scientific evidence, that animals of the kind concerned are capable of ...
It is widely accepted that the effects of global sea-level changes at the transition from the Devonian to the Carboniferous are recorded in deposits on the shelf of northern Gondwana. These latest Devonian strata had been thought to be poor in fossils due to the Hangenberg mass extinction. In the Mader (eastern Anti-Atlas), however, the Hangenberg Black Shale claystones (latest Famennian) are rich in exceptionally preserved fossils displaying the remains of non-mineralized structures. The diversity in animal species of these strata is, however, low. Remarkably, the organic-rich claystones have yielded abundant remains of Ammonoidea preserved with their jaws, both in situ and isolated. This is important because previously, the jaws of only one of the main Devonian ammonoid clades had been found (Frasnian Gephuroceratina). Here, we describe four types of jaws of which two could be assigned confidently to the Order Clymeniida and to the Suborder Tornoceratina. These findings imply that chitinous ...
According to modern studies, Lituitids are not Tarphyceridans, but a separate order (Lituitida), closely related with Orthocerida. For example: Kröger B., Servais T., Zhang Y. 2009. The origin and initial rise of pelagic cephalopods in the Ordovician. They are differ from Tarphycerids by the structure of embryonic shell and muscle scars. ...
Squid, whose real name is Wu Quarry Bay, also known as squid, cuttlefish or squid,the squid cephalopod Mollusca purpose animal. Squid will encounter enemies in order to jet as a way to escape, waiting for an opportunity to leave, hence the squid, squid and other names. Pigment in their skin a small capsule will with theemotional and change color and size. ...
Some ammonites have been found in association with a single horny plate or a pair of calcitic plates. In the past, these plates were assumed to serve in closing the opening of the shell in much the same way as an operculum, but more recently, they are postulated to have been, instead, a jaw apparatus.[6][7][8][9]. The plates are collectively termed the aptychus or aptychi in the case of a pair of plates, and anaptychus in the case of a single plate. The paired aptychi were symmetric to one another and equal in size and appearance. Anaptychi are relatively rare as fossils. They are found representing ammonites from the Devonian period through those of the Cretaceous period. Calcified aptychi only occur in ammonites from the Mesozoic era. They are almost always found detached from the shell, and are only very rarely preserved in place. Still, sufficient numbers have been found closing the apertures of fossil ammonite shells as to leave no doubt as to their identity as part of the anatomy of an ...
Hi, I bought this ammonite at least 10 years ago and have completely forgot about it since then. It is rough on one side and cut and polished along the m...
I came across an article/report published in Nature. September 2016. Suture pattern formation in ammonites and the unknown rear mantle structure For some...
Scientists at the American Museum of Natural History and Stony Brook University have demonstrated a new way to calculate the temperature of the ocean 80 million years ago: through the jaws of ammonites.
SPECTACULAR GEM AMMONITE Placenticeras intercalare Cretaceous Bearpaw Formation, Southern Alberta, Canada A huge - Available at 2011 June Dallas Signature...
Cephalopods such as octopuses, squid and cuttlefish are the most intelligent invertebrates, capable of using tools, unscrewing jars and outsmarting researchers.
Brian Fry, who did all that excellent work characterizing and cataloging the pharmacy of venoms secreted by poisonous snakes, has also turned his hand to the cephalopods. He examined the products of the venom glands of octopus, squid, and cuttlefish, and found a range of proteins, some unique, and others familiar: CAP (a CRISP protein), chitinase, peptidase S1, PLA2 and others. There are a couple of interesting lessons in that list.. First, evolution doesnt just invent something brand new on the spot to fill a function - what we find instead is that existing proteins are repurposed to do a job. This is how evolution generally operates, taking what already exists and tinkering and reshaping it to better fulfill a useful function. Phospholipase A2, for instance, is a perfectly harmless and extremely useful non-venomous protein in many organisms - we non-toxic humans also make it. We use it as a regulatory signal to control the inflammation response to infection and injury - in moderation, its a ...
The cephalopod body, and especially the octopus body, is a unique object with respect to these demands. When part of the molluscan foot differentiated into a mass of tentacles, with no joints or shell, the result was a very unwieldy organ to control. The result was also an enormously useful thing, if it could be controlled. The octopuss loss of almost all hard parts compounded both the challenge and the opportunities. A vast range of movements became possible, but they had to be organized, had to be made coherent. Octopuses have not dealt with this challenge by imposing centralized governance on the body; rather, they have fashioned a mixture of local and central control. One might say the octopus has turned each arm into an intermediate-scale actor. But it also imposes order, top-down, on the huge and complex system that is the octopus body. (71 ...
Download cephalopod, fishes, ocean life, octopus, sea, sea creature icon in .PNG or .ICO format. Icon designed by Yu Luck found in the icon set Ocean life Part-1
Ive been stumped on this on google scholar (maybe because I dont know the right keywords): What determines sex in cephalopods. I know some molluscs are...
How hard is it to keep a cephalopod as a pet anyway? Have you ever been tempted PZ? We all know how you feel about your pet cat.. ...
Baculites, genus of extinct cephalopods (animals related to the modern squid, octopus, and nautilus) found as fossils in Late Cretaceous marine rocks (formed from 99.6 million to 65.5 million years ago). Baculites, restricted to a narrow time range, is an excellent guide or index fossil for Late
The ability to regenerate whole-body structures has been studied for many decades and is of particular interest for stem cell research due to its therapeutic potential. Several vertebrate and invertebrate species have been used as model systems to study pathways involved in regeneration in the past. Among invertebrates, cephalopods are considered as highly evolved organisms, which exhibit elaborate behavioral characteristics when compared to other mollusks including active predation, extraordinary manipulation, and learning abilities. These are enabled by a complex nervous system and a number of adaptations of their body plan, which were acquired over evolutionary time. Some of these novel features show similarities to structures present in vertebrates and seem to have evolved through a convergent evolutionary process. Octopus vulgaris (the common octopus) is a representative of modern cephalopods and is characterized by a sophisticated motor and sensory system as well as highly developed cognitive
ABSTRACT: Coleoid cephalopods (squid, cuttlefish, and octopus) have the largest and most complex brains of all invertebrates and show behavioral abilities similar to those of vertebrates. Among the coleoids, the oval squid Sepioteuthis lessoniana forms well-structured schools that are indicative of sociality. These behaviors are reflected in aspects of the well-developed brain. In this study, we focused on the role of the cephalopod brain in complex behavior. In order to reveal the network of γ-aminobutyric acid (GABA) in coleoids, we examined the immunohistochemical localization of glutamic acid decarboxylase (GAD), which is the synthetic enzyme of GABA, in the brain of young S. lessoniana. We found that GABAergic neurons and their axons were distributed throughout the brain. GABA neurons were abundantly localized in the inferior frontal lobe, which is involved in controlling arm motions, and in the subesophageal masses, which are lower and intermediate centers of action. GABAergic fibers were ...
Cephalopods possess the most complex centralized nervous system among molluscs and the molecular determinants of its development have only begun to be explored. To better understand how evolved their brain and body axes, we studied Sepia officinalis embryos and investigated the expression patterns of neural regionalization genes involved in the mediolateral patterning of the neuroectoderm in model species. SoxB1 expression reveals that the embryonic neuroectoderm is made of several distinct territories that constitute a large part of the animal pole disc. Concentric nkx2.1, pax6/gsx, and pax3/7/msx/pax2/5/8 positive domains subdivide this neuroectoderm. Looking from dorsal to ventral sides, the sequence of these expressions is reminiscent of the mediolateral subdivision in model species, which provides good evidence for mediolateral patterning conservation in cephalopods. A specific feature of cephalopod development, however, includes an unconventional orientation to this mediolateral ...
Find the fascicles article Description des rhyncholites des Nautiles (Mollusca, Cephalopoda) du Paléogène des bassins de Paris et dAquitaine et des Corbières (France) on the website of Scientific Publications of the Muséum national dHistoire naturelle, Paris
Adamo, S.A. & Hanlon, R.T. (1996). Do cuttlefish (Cephalopoda) signal their intentions to conspecifics during agonistic encounters? Animal Behaviour 52, 73-81.. Barata, E.N., Serrano, R.M., Miranda, A., Nogueira, R., Hubbard, P. C. & Canário, A.V.M. (2008). Putative pheromones from the anal glands of male blennies attract females and enhance male reproductive success. Animal Behaviour 75, 379-389.. Boal, J.G. (1997) Female choice of males in cuttlefish (Mollusca: Cephalopoda). Behaviour 134, 975-988.. Boal, J.G. (2006) Social recognition: A top down view of cephalopod behaviour. Vie et Milieu-Life and Environment 56, 69-79.. Boal, J.G. & Golden, D.K. (1999) Distance chemoreception in the common cuttlefish, Sepia officinalis (Mollusca, Cephalopoda). Journal of Experimental Marine Biology and Ecology 235, 307-317.. Chybicki, I.J. & Burczyk, J. (2009). Simultaneous estimation of null alleles and inbreeding coefficients. Journal of Heredity 100 (1), 106-113.. Conte, F.S. (2004). Stress and the ...
The Sprinting Cephalopod is a community-created cosmetic item for the Scout. They are a pair of floppy team-colored octopus tentacles that replace the Scouts default shoes. Equipping this item replaces the footstep sound for the Scout with a wet squish sound. This item can only be worn around Halloween or during a Full Moon; at other times of the year, it does not appear in gameplay, unless the server has Halloween mode enabled. However, it can be equipped at any time and can still be viewed on the loadout screen even when it is not visible during games. The Sprinting Cephalopod was contributed to the Steam Workshop. ...
Octopuses can learn. They can make discriminations based on visual, tactile, and chemical cues. Octopus vulgaris keeps its home hidden. The females find a hole, a crevice or sheltered place ad they often protect their homes with shells, stones, and other solid objects they gather.. Members of this species are perfectly adapted to live in very different habitats. Their capacity to conceal themselves on any substrate by varying colour, skin, texture, and posture is challenged by few other cephalopod species. In the Catalonian Sea, more particularly in the area of Banyuls and Port Vendres, Octopus vulgaris seems to undergo seasonal migrations, mainly of vertical orientation. In the early spring, large animals move inshore for spawning. The females tend to disappear during the summer; they lay eggs, brood, and die. From late summer onwards, the largest size class consists mainly of males. They leave the coastal waters in autumn or early summer; at this time the males are mature, and the females at ...
The cephalopods first appeared in the late [[Cambrian]]. The first forms had gently curved shells. During the [[Ordovician]] the group underwent an astonishing evolutionary radiation, possibly due to the new ecological niches made possible by the extinction of [[Anomalocarida,anomalocarids]] at the end of the Cambrian. Some eight new orders appeared. There was tremendous diversity among them. Some had long straight shells, short straight ones, curved, lightly coiled, and tightly coiled ones evolved. The internal structure of the shell differed greatly as well, mostly in the structure of the [[siphuncle]]. Most were probably relatively slow movers, at least compared to todays forms. The largest ones had huge straight shells that reached 3 to 5 or even 10 metres in length. All these early forms are classed under the [[paraphyletic]] and probably [[artificial taxon]] Nautiloidea ...
This site is part of the Jurassic World Heritage Coastline, so follow the Fossil Code of Conduct. This is an SSSI, so the use of hammers on the bedrock and cliffs is not allowed. In addition, the cliffs are extremely dangerous, so collecting directly from them is extremely inadvisable. However, fossils are found washed up on the foreshore and so hammers are not required.. The ammonite, Pavlovia rotunda can also be found flattened in the foreshore clays. We do not recommend collecting this ammonite, as it is too fragile and best left for others to see. Instead, try to find nodules (Rotunda Nodules), as these can contain superb ammonites, but these are not a common as they once were. However, large ammonites have been found loose, which have fallen out of boulders and many fragments can lie scattered along the beach.. If you carry on to Freshwater Steps, which is about 2.5km from the pool, the foreshore and cliff yields the crinoid Saccocoma, which is pyritised. Freshwater Steps is equal distance ...
AMMONITE WITH BITE MARKS Placenticeras meeki Late Cretaceous, Pierre Shale South Dakota, USA - Available at 2014 September 28 Nature &...
Material: Ammonite. Region: Madagascar. It is not an antique but a symbol of ancient Chinese art as a collection, hope we can communicate with art and culture of ancient China. A great and significative collection or gift!
Fuchs_et_al_2015_PZ.pdf @TqB @belemniten @PFOOLEY @DPS Ammonite and perhaps a host of others? The list of authors read like a whos who of paleomalacology /RECOMMENDED!!!!!! ___________________________________________________________________________ A nearly complete respiratory, circulatory, and excretory system preserved in small Late Cretaceous octopods (Cephalopoda) from Lebanon Dirk Fuchs • Philipp R. Wilby • Sigurd von Boletzky • Pierre Abi-Saad • Helmut Keupp • Yasuhiro Iba Palaontol Z. DOI 10.1007/s12542-015-0256-6 ...
Abaca (n.) The Manila-hemp plant (Musa textilis); also, its fiber. See Manila hemp under Manila.. Abigail (n.) A ladys waiting-maid.. Abreast (adv.) Side by side; also, opposite; over against; on a Abstain (v. i.) To hold ones self aloof; to forbear or refrain voluntarily, and especially from an indulgence of the passions or appetites; -- with from.. Acciaccatura (n.) A short grace note, one semitone below the note to which it is prefixed; -- used especially in organ music. Now used as equivalent to the short appoggiatura.. Acerate (a.) Acerose; needle-shaped.. Acetabular (a.) Cup-shaped; saucer-shaped; acetabuliform.. Acetabulifera (n. pl.) The division of Cephalopoda in which the arms are furnished with cup-shaped suckers, as the cuttlefishes, squids, and octopus; the Dibranchiata. See Cephalopoda.. Acetabuliform (a.) Shaped like a shallow cup; saucer-shaped; as, an acetabuliform calyx.. Acetanilide (n.) A compound of aniAchlamydate (a.) Not possessing a mantle; -- said of certain ...
Jorgensen, E. M. 2007. Identification, distribution and relative abundance of paralarval gonatid squids (Cephalopoda: Oegopsida: Gonatidae)from the Gulf of Alaska, 2001-2003. Journ. Molluscan Studies, 73: 155-165. Katugin, O. N. 1993. Study of relationships between different species of squid, family Gonatidae, by protein electrophoresis. In: Biology and Rational Use of Hydrobionts. Their role in ecosystems. Abstracts of communications of the TINRO Young Scientisit Conference, Vladivostok, p. 14-15. In Russian.. Katugin, O. N. 1995. Morphology, genetic difference, and evolution of Berryteuthis magister, Berriteuthis anonychus, and Gonatopsis borealis (Cephalopoda: Oegopsida). In: Unitas Malacologica. 12th International Malacological Congress. Vigo, Spain. Abstracts. p. 312-313.. Katugin, O. N. 2004. Squids of the family Gonatidae from the North Pacific Ocean and their genetic differentiation: controversial issues in the systematics and phylogeny.Ruthenica 14(1): 73-87. In Russian with English ...
The oegopsid squid Illex illecebrosus was selected for consideration by reason of the limited knowledge which surrounds the cellular elements of its blood and the potential significance these answers might have on its unique phylogeny. -- Standard blood smear preparations were utilized to define a working image of those elements, later to be described as eosinophilic granulocytes. Incorporated within this study was the application of Villanueva stain which, having imparted greater contrast between nucleus and cytoplasm, made microvideomat analysis possible. Relationships between selected nuclear configurations and their areas, selected nuclear configurations and the associated cytoplasmic areas, and thirdly, between the nuclear and cytoplasmic areas were derived from such data. -- Living preparations stained supravitally provided correlative information as to the nature and/or presence of cell organelles observed at the levels of light and electron microscopy. -- Experiments were devised to ...
Posterior salivary glands. As the gland described above, posterior salivary glands are simple branched tubular glands. They are covered by a connective capsule with muscular fibers surrounding the glandular tubules like thin connections. Each tubule presents two zones formed by different cells. The first or proximal zone (A) consists of globular mucous cells with flattened basal nuclei (Figure 5b). The supranuclear cytoplasm contains high level of PAS (+) and alcian blue (+) pH = 3.5, vesicles denoting the presence of weakly sulphated glycosaminoglycans content. Cylindrical cells with a basal spherical nucleus surrounded by a basophilic cytoplasm are also seen. The second or distal zone (B) present cylindrical cells characterized by its weakly eosinophilic cytoplasm. The nucleus with basal or apical location is observed (Figure 5b). The PAS (+) and Alcian Blue (-) pH = 3.5 reaction in the cytoplasm, suggests the presence of neutral carbohydrates.. Animals kept in the aquarium without food for ...
The Squid, Octopus, and Nautilus ClipArt gallery includes 132 illustrations of squid, octopus, nautilus, and ammonites. These animals are members of the mollusk (or mollusc) class of cephpalopods, named cephalopoda.. ...
The CR-2 Plus AF is an Auto focusing Non Mydriatic Camera with Fundus AutoFluorescence (FAF) With the added auto functions, taking images with a Canon retinal camera has never been easier! The FAF photography mode will provide information on changes of the retina that cant be made visible with standard colour photography. The 5 photography modes: Color, Red Free, Cobalt, FAF and Anterior Segment make the CR-2 Plus AF a very versatile retinal camera. It is equipped with a unique dedicated EOS camera for the highest image quality.. ...
by the way, when are you returning my shoe vest, its my favorite. and yes I am a celebrity....in my own head so, but seriously, no one has followed that rule Newsy put in red so I guess its a resistence now. try putting the rules in flashing banner graphics that scream at us Newsy ...
Fig. 4. Detailed views of the deeper-water carbonates (Units A, B, C) and the calcareous marls to marlstones of the Marlstone member from the Kasımlar Formation of the Aşağiyaylabel (AS I, AS IV) and Karapinar (KA I-II & IV) sections. Well-bedded Kasimlarceltites beds at the base of the Kasımlar Formation (Carbonate member, Unit A) at the sections (a) AS I, (b) AS IV, (c) KA I and (d) KA II. Julian/Tuvalian boundary (Lower/Upper Carnian boundary) at the carbonate/marl transitional intervals at the sections (e) AS I and (f) KA IV within the Kasımlar Formations at the top of Unit C, below the Marlstone member. (g) Characteristic marls of the Marlstone member (AS I) within the Kasımlar Formation bearing the abundant Tuvalian ammonoid Paratropites cf. hoetzendorfii. (h) Layer with accumulation of the bivalve Halobia and pyrite cubes within the Marlstone member from AS I. (i) Sandstone layer of the Marlstone member, AS I. (j) Breccia layer with shallow-water components within the Marlstone ...
The mantle cavity is a central feature of molluscan biology. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. This space contains the molluscs gills, anus, and organs for taste, excretion and reproductive organs. The mantle cavity functions as a respiratory chamber in all molluscs. In bivalves it is usually part of the feeding structure. In some mollusks the mantle cavity is a brood chamber, and in cephalopods and some bivalves such as scallops, it is a locomotory organ. The mantle is highly muscular. In cephalopods the contraction of the mantle is used to force water through a tubular siphon, and this propels the animal rapidly through the water. In other molluscs, it is used as a kind of foot for locomotion. ...
Rain long foretold takes a long time to pass; if it arrives on short notice, it soon will pass. For the folks I go out collecting with all hikes, digs and kayak trips are rain or shine. Safety is always top of mind and prepping for the weather is paramount. Keep yourself safe whatever part of the world you choose to explore. For forecasts of marine weather in Vancouver call 604.666.3655 or visit http://www.weatheroffice.com/ ...
These Cenomanian representatives (Figs 3A-J, 4A-C) are all very involute at small diameters, becoming progressively more evolute as size increases. The umbilicus is ofmoderate depth, with a flattened, undercut wall and narrowly rounded umbilical shoulder. The whorl section is invariably depressed, reniform, with a whorl breadth to height ratio of 1.1 to 1.32, the greatest breadth below mid-flank in the smaller specimens. Most specimens are weathered, and show neither ornament nor constrictions. SAM PCZ022454, (ex D994) is a particularly evolute juvenile, and although rather worn, has broad, distant, linguoid ventral ribs.. SAM-PCZ022449a (ex A599) is a well-preserved internal mould 68 mm in diameter. There are 6-7 strong flexuous constrictions per halfwhorl. SAM-PCZ022458 (exD2491) is the largest specimen with the shell well preserved, and bears 6-7 distinct collar-ribs per whorl. These arise at the umbilical seam, and are prorsiradiate and flexuous, straight to feebly convex on the inner flank, ...
Types.- Holotype is UWBM74501(Figure 39.2) from Member IV, Zumaya, Spain. Paratype UWBM76079 (Figure 40.9) is from Member IV, Bidart, France. Paratype UWBM76096 (Figure 41) is from Member IV, Hendaye, France. Etymology. - Terminus (Latin), the Roman deity who presided over boundaries or landmarks. Discussion. - Anapachydiscus terminus n. sp. differs from A. fresvillensis in the much higher rib density in early and middle growth stages (more than 60 vs. 31-32, increasingto 40). Later stages are very similar in that the massive involute shell of both species has ventral ribbing only, but flank ribs persist in A. terminus at a stage where they are effacing in A. fresvillensis (compare Figure 40.9 and Figure 35.6). The high rib density immediately distinguishes A. terminus from other European Campanian Anapachydiscus, such as A. wittekindi (Schl ter, 1872) (see Blaszkiewicz, 1980, p. 50, Pl. 42, figs. 1, 2, Pl. 43, fig. 2, Pls. 44-47, Pl. 48, figs. 3, 4, Pl. 49, figs. 1, 3, Pl. 50, figs. 2, 3, Pls. ...
As senior Alexa Warburton opens the door to the cephalopod lab, a pungent smell escapes into the third-floor hallway of Middlebury Colleges McCardell Bicentennial Hall. It smells like the ocean, she comments. And it should. Warburton, a senior biology major from Hopkinton, N.H., is spending her summer studying a member of the cephalopod family, Octopus bimaculoides . Her goal is to study the way these saltwater creatures learn, thereby furthering the already-extensive body of research on invertebrate intelligence. ...
MetaFilter is a weblog that anyone can contribute a link or a comment to. A typical weblog is one person posting their thoughts on the unique things they find on the web. This website exists to break down the barriers between people, to extend a weblog beyond just one person, and to foster discussion among its members.. ...
In particular niches of the marine environment, such as abyssal trenches, icy waters and hot vents, the base of the food web is composed of bacteria and archaea that have developed strategies to survive and thrive under the most extreme conditions. Some of these organisms are considered
One of the coils in a molluscan shell. Whorls are most noticeable among Gastropoda and Cephalopoda, in which the shell is a hollow cone that grows only at the apertural end and tends to curl about its vertical axis. In most molluscs the coils form a helix in which each whorl is attached to the next, but in some the coiling is loose. ...
Cuttlefish is a marine member of the class of Cephalopods. She is known as the chameleon of the sea, as different situations can rapidly change its color.
SELAIN lezat, cumi-cumi kaya gizi. Ada protein, mineral, dan macam-macam vitamin. Tinta cair yang dimilikinya, berguna untuk memerangi tumor. Cumi-cumi merupakan salah satu hewan laut dari keluarga Loliginidae, kelas Cephalopoda. Dalam bahasa Latin, cumi-cumi dikenal dengan sebutan Loligo spp, sedangkan dalam bahasa Inggris squid. Di Indonesia, cumi-cumi dikenal dengan beberapa istilah, seperti enus, nus, sotong,…
Members of the class Cephalopoda are gonochoric. Male and female adults usually die shortly after spawning and brooding, respectively. Mating behavior: Males perform various displays to attract potential females for copulation. During copulation, male grasp the female and inserts the hectocotylus into the females mantle cavity where fertilization usually occurs. Life cycle: Embryos hatch into planktonic stage and live for some time before they grow larger and take up a benthic existence as adults (Ref. 833). ...
Systematics of the Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida). Zootaxa 2696: 1-186. Preview ...
On Mesonychoteuthis, a new genus of oegopsid, Cephalopoda. Annals and Magazine of Natural History, Series 9, 16: 272-277. ... Clarke, M.R. (1980). "Cephalopoda in the diet of sperm whales of the southern hemisphere and their bearing on sperm whale ... Mesonychoteuthis hamiltoni Robson, 1925 (Cephalopoda, Oegopsida). Antarktika Doklady Komission 14: 159-189. [English ...
The firefly squid belongs to the Cephalopoda class and the superorder Decapodiformes, commonly known as squids. Their body is ...
Bolstad, K.S.; O'Shea, S. (2004). "Gut contents of a giant squid Architeuthis dux (Cephalopoda: Oegopsida) from New Zealand ...
et sp.), a new octopus from the tropical Indo-West Pacific (Cephalopoda: Octopodidae)". Molluscan Research. 25 (2): 57-70.. ... Cited in Borrelli, Luciana; Gherardi, Francesca; Fiorito, Graziano (2006). A catalogue of body patterning in Cephalopoda. ... Around 300 species are recognised, and the order is grouped within the class Cephalopoda with squids, cuttlefish, and ... "The Cephalopoda". University of California Museum of Paleontology. Retrieved 27 March 2017.. ...
Wikisource has the text of the 1911 Encyclopædia Britannica article Cephalopoda.. *Cephalopoda Tree of Life Web Project - ... A cephalopod (pronounced /ˈsɛfələˌpɒd/ or /ˈkɛf/~) is any member of the molluscan class Cephalopoda (Greek plural κεφαλόποδα, ... Class Cephalopoda († indicates extinct groups). *Subclass Nautiloidea: Fundamental ectocochleate cephalopods that provided the ... Nixon, M. (1995). "A nomenclature for the radula of the Cephalopoda (Mollusca) - living and fossil". Journal of Zoology. 236: ...
The diet of the longfin inshore squid changes with size; small immature individuals feed on planktonic organisms while larger individuals feed on crustaceans and small fish. Studies showed that juveniles fed on euphausiids and arrow worms, while older individuals fed mostly on small crabs, but also on polychaetes and shrimp. Adults fed on fish (clupeids, myctophids) and squid larvae/juveniles, and those larger than 16 cm fed on fish and squid. Fish species preyed on by longfin inshore squid include silver hake, mackerel, herring, menhaden, sand lance, bay anchovy, weakfish, and silversides. Maurer and Bowman (1985) discovered a difference in inshore/offshore diet: in offshore waters in the spring, the diet is composed of crustaceans (mainly euphausiids) and fish; in inshore waters in the fall, the diet is composed almost exclusively of fish; and in offshore waters in the fall, the diet is composed of fish and squid. Cannibalism is observed in individuals larger than 5 cm."[2] ...
Cephalopoda). 鸚鵡螺亞綱(Nautiloidea). 鸚鵡螺目(英语:Nautilida)(Nautilida) ...
Robson, G. C. (1929) Notes on the Cephalopoda. - IX. Remarks on the Atlantic Octopoda etc. in the Zoologisch Museum, Amsterdam ... 1998) Classification, type localities and type repositories of recent Cephalopoda, Systematics and Biogeography of Cephalopods ...
Roper, C. F. E. and M. J. Sweeney (1978) , A catalog of the type-specimens of Recent Cephalopoda in the National Museum of ... 1998) Classification, type localities and type repositories of recent Cephalopoda, Systematics and Biogeography of Cephalopods ...
Cephalopoda. Fauna und Flora des Golfes von Neapel. Monograph, no. 35. [English translation: A. Mercado 1972. Israel Program ...
Cephalopoda. Fauna e Flora de Golfo di Napoli. Monograph, no. 35. "CephBase: Chtenopteryx sicula". Archived from the original ... CS1 maint: discouraged parameter (link) Current Classification of Recent Cephalopoda Archived December 10, 2006, at the Wayback ...
Cephalopoda. Report on the Danish Oceanographical Expeditions 1908-10 to the Mediterranean and Adjacent Seas 2(9): 1-94. ...
Naef, A. (1972). Cephalopoda. Fauna and Flora of the Bay of Naples (Fauna und Flora des Golfes von Neapel und der Angrenzenden ... Naef, A. (2000). Cephalopoda. Embryology. Fauna and Flora of the Bay of Naples [Fauna und Flora des Golfes von Naepel]. ... Boletzky, S. (2000) "Adolf Naef: A biographical note." In: Naef A (1928) Cephalopoda Embryology. Fauna and Flora of the Bay of ... Cite journal requires ,journal= (help) Naef, A. (1933). "Cephalopoda", pp. 293-310 in DITTLER, R., JOOS, G, KORSCHELT, E. LINCK ...
1. Cephalopoda. George W. Tryon. pp. 162. Addison Emery Verrill (1878-1882). "The cephalopods of the north-eastern coast of ... William Evans Hoyle (1886). "Report on the cephalopoda collected by H.M.S. Challenger during the years 1873-76". In John Murray ... Myopsida, Octopoda" [The Cephalopoda. Part I: Oegopsida. Part II: Myopsida, Octopoda]. Wissenschaftliche Ergebnisse der ... M.J. Imber (1978). "The squid families Cranchiidae and Gonatidae (Cephalopoda: Teuthoidea) in the New Zealand region". New ...
Bather, F.A. (1888). "Shell-growth in Cephalopoda (Siphonopoda)". Annals and Magazine of Natural History. 6 (1): 298-310. doi: ... Class Cephalopoda Subclass Nautiloidea: nautilus Subclass †Ammonoidea: ammonites Subclass Coleoidea Division †Belemnoidea: ... Nishiguchi, Michelle & Mapes, Royal K. (2008). "Cephalopoda". In Ponder, Winston F. & Lindberg, David R. (eds.). Phylogeny and ...
Current Classification of Recent Cephalopoda "CephBase: Sepia irvingi". Archived from the original on 2005. v t e. ... Meyer, W. T. (1909). "Chapter 19". Cephalopoda. Die Fauna Südwest-Australiens. ITIS. 2. pp. 329-335. Retrieved 16 May 2016. ...
Volume 1. Cephalopoda. 1879. (in the introductory statement) Hyatt A. & Pilsbry H. A. 1911. Manual of conchology, structural ... 1879 - Volume 1. Cephalopoda. 1880 - Volume 2. Muricinae, Purpurinae. 289 pp., 70 plates. 1880-1881 - Volume 3. Tritoniidae, ...
Lower rostral length Upper rostral length Young, R.E., M. Vecchione & K.M. Mangold (1999). Cephalopoda Glossary. Tree of Life ... Jackson, G.D. (1995). The use of beaks as tools for biomass estimation in the deepwater squid Moroteuthis ingens (Cephalopoda: ... doi:10.1017/S0025315400057684 Clarke, M.R. & L. Maddock (1988). Beaks of living coleoid Cephalopoda. In: M.R. Clarke & E.R. ... doi:10.1111/j.1502-3931.1983.tb02000.x Kanie, Y. (1998). New vampyromorph (Coleoidea: Cephalopoda) jaw apparatuses from the ...
Mollusca: Cephalopoda". NOAA Technical Report NMFS 73 (National Oceanic and Atmospheric Administration & National Marine ...
Cephalopoda indet. Gastropoda indet. Ischnacanthida indet. Ophiuroidea indet. Palaeotaxodonta indet. Tentaculitida indet. ...
Class Cephalopoda. In: Cook S de C ed. New Zealand Coastal Marine Invertebrates, volume 1. Christchurch, Canterbury University ... The marine fauna of New Zealand: Octopoda (Mollusca: Cephalopoda). NIWA Biodiversity Memoir 112, 280 pp. O'Shea S, Jackson GD ...
doi:10.2989/025776198784126340 Young, R.E., M. Vecchione & K.M. Mangold (2000). Cephalopoda Fin Cartilage. Tree of Life Web ... Vecchione, M. & R.E. Young (1998). The Magnapinnidae, a newly discovered family of oceanic squid (Cephalopoda: Oegopsida). ... Cephalopoda Glossary. Tree of Life Web Project. ...
... , sail, and cuttlefish CS1 maint: discouraged parameter (link) Chun, Carl (1975). The Cephalopoda. Israel Program ...
Cephalopoda: Idiosepiidae). Venus, the Japanese Journal of Malacology 50(3): 165-174. Okutani, T. 1995. Cuttlefish and squids ... Current Classification of Recent Cephalopoda "CephBase: Idiosepius thailandicus". Archived from the original on 2005.. ...
Young, R.E., M. Vecchione & K.M. Mangold (1999). Cephalopoda Glossary. Tree of Life Web Project. Prasad, R.R. (1948). " ...
It is grouped within the class Cephalopoda along with squids and cuttlefish. O. minor carries cultural and economic value in ... This corresponds with the translation of Cephalopoda which means "head foot", as its foot/feet are directly attached to its ... Huffard, C. L. (2006-10-01). "Locomotion by Abdopus aculeatus (Cephalopoda: Octopodidae): walking the line between primary and ... Vendetti, J (2006). "The Cephalopoda". Cite journal requires ,journal= (help) Glionna, J (2010). "South Korean fisherman, ...
Cephalopoda Glossary. Tree of Life web project. Norman, M. 2000. Cephalopods: A World Guide. ConchBooks, Hackenheim. p. 15. " ... Cephalopoda)". Zoomorphology. 110 (6): 313-316. doi:10.1007/BF01668021. Gleadall I.G. (1989). "An octopus with only seven arms ...
Cephalopoda Glossary. Tree of Life Web Project. Young, R.E., M. Vecchione & K.M. Mangold (1997). Cephalopod Funnel Locking- ...
Cephalopoda: Idiosepiidae) from eastern Australia and elevation of the southern endemic 'notoides' clade to a new genus, ... Cephalopoda: Idiosepiidae). Venus, 50(3), 165-174. von Boletzky, S., et al. 2005. "Idiosepius: Ecology, Biology and ...
Encyclopedia of Life, Cephalopoda *Major cephalopod references on the web:. *Hoyle, W. E. 1886. Report on the Cephalopoda ... For an overview of the people working on the ToL Cephalopoda branch, see ToL Scientific Contributors for Cephalopoda ... Class: Cephalopoda Cuvier, 1797 *Subclass: Nautiloidea Agassiz, 1847 * * * * * *Fam: Nautilidae Blainville, 1825 ... The Cephalopoda is an ancient and very successful group of the Mollusca. Cephalopods have been among the dominant large ...
Boletzky SV (1974) The larvae of cephalopoda: a review. Thalassia Jugosl 10(1/2):45-76Google Scholar ...
MOLLUSCA (V): DIVERSITY-Cephalopoda (Mollusca study images; click on tree to see full cladogram) ... 8) Class CEPHALOPODA (nautilus, squids, octopus) ~700 marine spp a) includes largest (to 19 m), fastest swimming (to 25 kph), ...
A new study, using high-speed photography, shows that squids can save energy by flying rather than swimming. Some species of Cephalopoda can launch themselves into…. ...
A new species of dicyemid mesozoan is described from Sepiella japonica Sasaki, 1929, collected from the eastern area of Inland Sea, Osaka Bay, and Kii Strait in Japan. Dicyema sepiellae n. sp. is a large species that reaches about 4,000 microm in len
Cephalopoda in the three subclasses as shown. Nautiloids are also known as Palcephalopoda. , a term which is applied to most ... The name Cephalopoda literally means head feet which refers to the cluster of [[arm]]s and/or [[tentacle]]s that project ... The name Cephalopoda literally means head feet which refers to the cluster of [[arm]]s and/or [[tentacle]]s that project ... Class Cephalopoda===. +. The ,u,. Palcephalopoda. -Neocephalopoda,/u, distinction is based on essential differences between the ...
The palcephalopoda includes most of the Nautiloidea as originally defined but leaves out the Orthocerida which are combined with the Bactritida, Ammonoidea, and coleoids in the Neocephalopoda. Palcephalopods characteristically have cap-shaped apeces with a cicatrix ore something similar and are retrosiphonte, meaning the septal necks in the siphuncle point to the rear. The apex in neocephalopoda is bulbous and lacks a cicatrix. The only living palcephalopods are Nautilus and Allonautilus. Both are tetrabranchiate (posses 4 gills), have radula with 9 teeth and 4 marginalia (Lateradulata) and posses a large number of sticky finger-like arms that lack suckers. Reproduction is what is known as K-selected, with a few large yolk-rich eggs produced a number of times from which large well developed offspring come. Adults are long-lived ...
Cephalopoda: Sepiidae). by The Biological Bulletin; Biological sciences Research Cephalopods Morphology (Biology) Nautilus ... APA style: Cuttlebone Morphology Limits Habitat Depth in Eleven Species of Sepia (Cephalopoda: Sepiidae).. (n.d.) >The Free ... A review of the Sepiidae (Cephalopoda) of Southern Africa. Ann. S. Afr. Mus. 59 (10): 313 pp. Timoshenko, D. 1940. Theory of ... MLA style: "Cuttlebone Morphology Limits Habitat Depth in Eleven Species of Sepia (Cephalopoda: Sepiidae).." The Free Library. ...
Cephalopoda) are an exceptional class among the invertebrates, characterised by the advanced development of their conditional ... Cephalopoda) are an exceptional class among the invertebrates, characterised by the advanced development of their conditional ... Cephalopoda: Nautiloidea; Voss, 1977; Sanchez et al., 2018). However, several coleoid taxa (Cephalopoda: Coleoidea) are also ... Bello, G. (2006). Signs of multiple spawning in Graneledone pacifica (Cephalopoda: Octopodidae). J. Marine Biol. Assoc. U.K. 86 ...
Silas EG (1968) Cephalopoda of the west coast of India collected during the cruises of the research vessel Varuna, with a ... Voss NA (1969) A monograph of the Cephalopoda of the North Atlantic: the family Histioteuthidae. Bull Mar Sci 19:713-867Google ... Berry SS (1918) Report on the Cephalopoda Obtained by the FIS. "Endeavour" in the Great Australian Bight and Other Southern ... Presence of the Wondrous Jewel Squid Histioteuthis miranda (Cephalopoda: Histioteuthidae) in the Eastern Arabian Sea and ...
Cephalopoda (9788400072674): NHBS - Ángel Guerra Sierra, Museo Nacional de Ciencias Naturales ...
Cephalopoda. Introduction. Few studies have investigated the complex digestive tract of Nautilus pompilius and Nautilus ... Boucher-Rodoni, R. (1973). Vitesse de digestion dOctopus cyanea (Cephalopoda: Octopoda). Mar. Biol. 18,237 -242. ... Schipp, R. and Martin, A. W. (1981). Cytology of the renal appendages of Nautilus (Cephalopoda, Tetrabranchiata). Cell Tissue ... Boucher-Rodoni, R. and Mangold, K. (1977). Experimental study of digestion in Octopus vulgaris (Cephalopoda, Octopoda). J. Zool ...
Voight, J. R. , Pörtner, H. O. and ODor, R. K. (1994): A review of ammonia-mediated buoyancy in squids (Cephalopoda) , Marine ...
Estudio sobre algunas especies del género Bathypolypus (cephalopoda: Octopoda) halladas en las costas de Galicia. ...
The digestive tract of Nautilus pompilius (Cephalopoda, Tetrabranchiata): an X-ray analytical and computational tomography ...
Pulpos octopódidos (Cephalopoda: Octopodidae). 69-98. In: Boschi, E. E. (Ed.). El mar argentino y sus recursos pesqueros. Tomo ... The digestive system of E. megalocyathus presents the typical morphology in U shape of the Cephalopoda Coleoidea. The dorsal ... MICROANATOMÍA DEL SISTEMA DIGESTIVO DE ENTEROCTOPUS MEGALOCYATHUS (CEPHALOPODA, OCTOPODA) EN EL ATLÁNTICO SUROCCIDENTAL ... Morfología del aparato digestivo de Enteroctopus megalocyathus y Loligo sanpaulensis (Mollusca, Cephalopoda). Iheringia, Sér. ...
Part 4, Jurassic Cephalopoda and a Cretaceous Nautilus. Bulletin of the AMNH ; v. 82, article 3. en_US. ... Part 4, Jurassic Cephalopoda and a Cretaceous Nautilus. Bulletin of the AMNH ; v. 82, article 3. ...
Cephalopoda). Production of soma and gonad in maturing female Illex argentinus (Mollusca: Cephalopoda). Samples of male Illex ...
Cephalopoda) in the Great Barrier Reef and Coral Sea, Reviews in Fish Biology and Fisheries" on DeepDyve, the largest online ... Genetic diversity of isolated populations of Nautilus pompilius (Mollusca, Cephalopoda) in the Great Barrier Reef and Coral Sea ... A phylogenetic study of the squid family Onychoteuthidae (Cephalopoda: Oegopsida). Bonnaud, L; Rodhouse, PG; Boucher-Rodoni, R ... Genetic diversity of isolated populations of Nautilus pompilius (Mollusca, Cephalopoda) in the Great Barrier Reef and Coral Sea ...
Cephalopoda. Cephalopods include the squid, octopus, cuttlefish, and the survivor of an ancient lineage-the nautilus. Their ... the Cephalopoda (squid, octopuses, cuttlefish, and nautilus), the Polyplacophora (chitons), the Scaphopoda (tooth shells), the ...
Squids (Cephalopoda). Introduction. Squids belong to the group of mollusks called cephalopods, which include octopi, cuttlefish ...
Containing group: Cephalopoda. Introduction. The Coleoidea contains two subdivisions. One, the Belemnoidea, had members that ... Suckers and arm hooks in Coleoidea (Cephalopoda, Mollusca) and their bearing for phylogenetic systematics. Abh. Naturwiss. Ver ... Phylogenetic analysis and systematization of the Cephalopoda (Mollusca). Verh. Naturwiss. Ver. Hamburg 29: 187-220. ...
Slugs, snails, oysters, clams, squid, octopuses, and cuttlefish are very different to look at, but they are all molluscs. They have a ribbon-like tong
The Ink-Bag of the Cephalopoda.. Departments. Purchase To Read More. Already purchased this issue? Sign In to Access ...
Robin, J. P., Salman, A. and Tasende, M. G. (2008) Systematics of Alloteuthis (Cephalopoda:Loliginidae) based on molecular and ...
Cephalopoda. "Cephalopoda is a class of mollusks, the highest in organization of the division of the animal kingdom.… ... Cuttlefish are marine animals of the order Sepiida belonging to the Cephalopoda class. Despite their… ... These animals are members of the mollusk (or mollusc) class of cephpalopods, named cephalopoda. ... The cephalopods are the mollusk class Cephalopoda characterized by bilateral body symmetry, a prominent… ...
Cephalopoda (Nautilus, Cuttlefish, Octopus and Squid). Squid image license: Creative commons. *Author ...
Systematics of the Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida). Zootaxa 2696: 1-186. Preview ...
On Mesonychoteuthis, a new genus of oegopsid, Cephalopoda. Annals and Magazine of Natural History, Series 9, 16: 272-277. ... Clarke, M.R. (1980). "Cephalopoda in the diet of sperm whales of the southern hemisphere and their bearing on sperm whale ... Mesonychoteuthis hamiltoni Robson, 1925 (Cephalopoda, Oegopsida). Antarktika Doklady Komission 14: 159-189. [English ...
  • The Cephalopoda is an ancient and very successful group of the Mollusca. (tolweb.org)
  • A new dicyemid from Sepiella japonica (Mollusca: Cephalopoda: Decapoda). (biomedsearch.com)
  • Cephalopods''' (Class Cephalopoda)are exclusively marine mollusks (Phyllum [[Mollusca]]) with well developed prehensile grasping appediges the encircle the mouth and protrude from a well defined head, and which have a well developed nervous system. (palaeos.org)
  • The cephalopods (Mollusca: Cephalopoda) are an exceptional class among the invertebrates, characterised by the advanced development of their conditional learning abilities, long-term memories, capacity for rapid colour change and extremely adaptable hydrostatic skeletons. (frontiersin.org)
  • Cephalopod , any member of the class Cephalopoda of the phylum Mollusca , a small group of highly advanced and organized, exclusively marine animals. (britannica.com)
  • Ammonoid or Ammonites are an extinct group of marine animals of the subclass Ammonoidea in the class Cephalopoda , phylum Mollusca . (newworldencyclopedia.org)
  • Within are described the qualities of Mollusca in nature, three of its sub-divisions - Bivalvia (oysters, clams…), Gastropoda (limpets, snails…) and Cephalopoda (octopuses, cuttle fish…) and expressions in the human being. (homeopathic.com)
  • A new genus and three new species of decapodiform cephalopods (Mollusca: Cephalopoda). (marinespecies.org)
  • 1998) Classification, type localities and type repositories of recent Cephalopoda, Systematics and Biogeography of Cephalopods. (wikipedia.org)
  • Part 4, Jurassic Cephalopoda and a Cretaceous Nautilus. (amnh.org)
  • A biphasic memory curve in the chambered nautilus, Nautilus pompilius L. (Cephalopoda: Nautiloidea). (semanticscholar.org)
  • Nautilus is the common name used to describe a group of marine animals in class Cephalopoda . (creationwiki.org)
  • Around 300 species are recognised and the order is grouped within the class Cephalopoda with squids , cuttlefish and nautiloids . (wikipedia.org)
  • Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda . (wikipedia.org)
  • Cephalopoda, Ammonoidea) from the Albian Mzinene Formation of KwaZulu-Natal, South Africa. (scielo.org.za)
  • A multi-gene phylogeny of Cephalopoda supports convergent morphologica" by Annie R. Lindgren, Molly S. Pankey et al. (pdx.edu)
  • A mitochondrial phylogeny of the family Onychoteuthidae (Cephalopoda: Oegopsida). (nih.gov)
  • Systematics of the Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida). (wikipedia.org)
  • The cuttlefish belongs to the mollusk class Cephalopoda-which means 'head-footed' derived from the Greek words kephale (head) and podes (feet)-ranging from 2.4 centimetres (around one inch) to 90 centimetres (three feet) in length (even bigger in the case of the giant Australian cuttlefish, which can reach the length of a small man). (creation.com)
  • These animals are members of the mollusk (or mollusc) class of cephpalopods, named cephalopoda. (usf.edu)
  • Cephalopoda is a class of mollusks, the highest in organization of the division of the animal kingdom. (usf.edu)
  • Here, we present a comparative study of the molluscan class Cephalopoda, a marine group known to occupy habitats from the intertidal to the deep sea. (pdx.edu)
  • Animals " are defined by the University Animal Ethics Policy as any living non-human vertebrate and any living invertebrate of the class of cephalopoda, including free-living and reproducing larval forms. (ualberta.ca)
  • head-feet") is any member of the mollusc class Cephalopoda , characterized by bilateral body symmetry , a prominent head, and a modification of the mollusk foot, a muscular hydrostat , into the form of arms or tentacles . (thefullwiki.org)
  • Cuttlebone Morphology Limits Habitat Depth in Eleven Species of Sepia (Cephalopoda: Sepiidae). (thefreelibrary.com)
  • EN] In the present paper 22 specimens of different species of the genus Bathypolypus caught of the Galician coast (NW Spain) were studied. (csic.es)
  • CS1 maint: discouraged parameter (link) Current Classification of Recent Cephalopoda Archived December 10, 2006, at the Wayback Machine Naef, A. 1921-23. (wikipedia.org)
  • Systematics of Alloteuthis (Cephalopoda:Loliginidae) based on molecular and morphometric data. (geomar.de)
  • Most classification divide the Cephalopoda in the three subclasses as shown. (palaeos.org)
  • By comparison, the egg capsules of Sepioteuthis australis (Cephalopoda) were found to have an irregular surface with many hills and valleys that accommodate colonization by a variety of microorganisms. (int-res.com)
  • Monoplacophora is not the sister group to other Conchifera but to Cephalopoda. (nih.gov)
  • Argonauts (Cephalopoda: Argonautidae) are a group of rarely encountered open-ocean pelagic octopuses with benthic ancestry. (royalsocietypublishing.org)
  • chambered nautilus cephalopoda marine biology the chambered nautilus nautilus … In addition, all chambered nautiluses are vulnerable to international trade and are listed under Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora. (a2hosted.com)
  • De fleste er marine, men vi har også en del arter på land og i ferskvann. (artsdatabanken.no)