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Vampyromorphida
Vampyromorphida is an order of cephalopods comprising one known extant species (''Vampyroteuthis infernalis'') and many extinct taxa. Physically, they somewhat resemble octopuses (their closest relatives), but the eight arms are united by a web of skin, and two smaller cilia are also present. Properly speaking, the vampire squid does not possess cilia, but cirri (cilia-like projections). Classification *Order Vampyromorphida **Suborder † Kelaenina ***Family †Muensterellidae **Suborder † Prototeuthina ***Family † Loligosepiidae ***Family † Geopeltididae ***Family † Lioteuthididae ***Family † Mastigophoridae **Suborder † Mesoteuthina ***Family † Palaeololiginidae ****Subfamily † Teudopseinae ****Subfamily † Palaeololigininae **Suborder Vampyromorphina ***Family Vampyroteuthidae The following taxa were long considered to belong to Vampyromorphida, but this placement may be incorrect:Fischer, Jean-Claude & Riou, Bernard (2002): ''Vampyronassa rhodanica'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vampire Squid
The vampire squid (''Vampyroteuthis infernalis'', lit. 'vampire squid from hell') is a small cephalopod found throughout temperate and tropical oceans in extreme deep sea conditions. The vampire squid uses its bioluminescent organs and its unique oxygen metabolism to thrive in the parts of the ocean with the lowest concentrations of oxygen. It has two long retractile filaments, located between the first two pairs of arms on its dorsal side, which distinguish it from both octopuses and squids, and places it in its own order, Vampyromorphida, although its closest relatives are octopods. As a phylogenetic relict, it is the only known surviving member of its order. The first specimens were collected on the Valdivia Expedition and were originally described as an octopus in 1903 by German teuthologist Carl Chun, but later assigned to a new order together with several extinct taxa. Discovery The vampire squid was discovered during the Valdivia Expedition (1898–1899), led by Carl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalopod
A cephalopod is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishers sometimes call cephalopods "inkfish", referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by ''Nautilus'' and ''Allonautilus''. In the Coleoidea, the molluscan shell has been internalized or is absent, whereas in the Nautiloidea, the external shell remains. About 800 living species of cephalopods have been ident ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vampyronassa
''Vampyronassa rhodanica'' ("vampire fish trap") is an extinct vampyromorph cephalopod known from around 20 fossils from the Lower Callovian (165–164 Ma) of La Voulte-sur-Rhône, Ardèche, France. Morphology ''Vampyronassa'' reached total length about . This taxon differs from the modern vampire squid in having longer first dorsal arms, a larger hyponome, and a more elongated mantle. Original description described possible luminous organs, however in restudy they could not be confirmed. It had eight arms with uniserial suckers flanked by cirri, same as modern vampire squid. Retractile filaments that is known from modern vampire squid is not known in ''Vampyronassa''. Like vampire squid, ''Vampyronassa'' lacked of ink sac. Classification ''Vampyronassa'' shares some characters with modern vampire squid ''Vampyroteuthis'', such as lack of ink sac and unique type of sucker attachment. Analysis supports the sister relationship between ''Vampyronassa'' and ''Vampyroteuth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teudopsis
''Teudopsis'' is a genus of the coleoid cephalopod family Teudopsidae, known only from Lower Jurassic gladii. It has been reported from Alberta, Canada and Europe. The life appearance of Teudopsis is probably best inferred by its close relative Trachyteuthis ''Trachyteuthis'' is a genus of fossil cephalopod, comprising five species: ''T. hastiformis'', ''T. latipinnis'', ''T. nusplingensis'', ''T. teudopsiformis'', ''T. covacevichi'' and ''T. chilensis''. Taxonomy The taxonomic placement of ''Tr .... A fossil with soft tissue preservation shows that this animal may have had two mantle fins, which may also be the case for Teudopsis. PART M, CHAPTER 13:FOSSILIZED SOFT TISSUES IN COLEOIDEA DESMONDT. DONOVAN1 & DIRK FUCHS References Coleoidea Cephalopod genera Fossil taxa described in 1835 {{cephalopod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vampyroteuthidae
Vampyroteuthidae is a family of vampyromorph cephalopods containing the extant vampire squid, ''Vampyroteuthis infernalis'', and the extinct genera '' Necroteuthis'', '' Provampyroteuthis'', and ''Vampyronassa ''Vampyronassa rhodanica'' ("vampire fish trap") is an extinct vampyromorph cephalopod known from around 20 fossils from the Lower Callovian (165–164 Ma) of La Voulte-sur-Rhône, Ardèche, France. Morphology ''Vampyronassa'' reached tota ...''. References Octopodiformes Cephalopod families Extant Middle Jurassic first appearances Taxa named by Johannes Thiele (zoologist) {{cephalopod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopus
An octopus ( : octopuses or octopodes, see below for variants) is a soft-bodied, eight- limbed mollusc of the order Octopoda (, ). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a beaked mouth at the center point of the eight limbs. The soft body can radically alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight appendages behind them as they swim. The siphon is used both for respiration and for locomotion, by expelling a jet of water. Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse of all invertebrates. Octopuses inhabit various regions of the ocean, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths. Most species grow quickly, mature ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopodiformes
Octopodiformes is a superorder of the subclass Coleoidea, comprising the octopuses and the vampire squid. All living members of Octopodiformes have eight arms, either lacking the two tentacles of squid (as is the case in octopuses) or modifying the tentacles into thin filaments (as in vampire squid). Octopodiformes is often considered the crown group of octopuses and vampire squids, including all descendants of their common ancestor. Some authors use the term Vampyropoda for the same general category, though others use "Vampyropoda" to refer to the total group (all cephalopods closer to octopods than to true squid). Another term is Octobranchia, referring to cephalopods without prominent tentacles. '' Pohlsepia'', originally described as earliest octopod is considered as dubious for this group in later study. The oldest unambiguous vampyropod is '' Syllipsimopodi'', a squid-like cephalopod from the Mississippian-age Bear Gulch Lagerstätte of Montana. ''Syllipsimopodi'' has a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extant Taxon
Neontology is a part of biology that, in contrast to paleontology, deals with living (or, more generally, '' recent'') organisms. It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct. For example: * The moose (''Alces alces'') is an extant species, and the dodo (''Raphus cucullatus'') is an extinct species. * In the group of molluscs known as the cephalopods, there were approximately 600 extant species and 7,500 extinct species. A taxon can be classified as extinct if it is broadly agreed or certified that no members of the group are still alive. Conversely, an extinct taxon can be reclassified as extant if there are new discoveries of living species ("Lazarus species"), or if previously-known extant species are reclassified as members of the taxon. Most biologists, zoologists, and botanists are in practice neontologists, and the term neontologist is used large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plesioteuthididae
Plesioteuthididae is an extinct family of squid True squid are molluscs with an elongated soft body, large eyes, eight arms, and two tentacles in the superorder Decapodiformes, though many other molluscs within the broader Neocoleoidea are also called squid despite not strictly fitting t .... References External links TONMO Forums: PlesioteuthisMorphology, feeding habits and phylogenic implications of the Cretaceous coleoid ''Dorateuthis syriaca'' Prehistoric cephalopod families Squid Taxa named by Adolf Naef {{Squid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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