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Megalocranchia
''Megalocranchia'' is a genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ... of glass squids. It occurs circumglobally in tropical and subtropical waters.Voss N. A., S. J. Stephen & Zh. Dong 1992. Family Cranchiidae Prosch, 1849. ''Smithson. Contributions Zool.'' 513: 187-210. Description Some members of the genus ''Megalocranchia'' can reach large sizes, up to 1800mm in the case of ''M. fisheri''. Young paralarvae often resemble other members of the Cranchiidae, having transparent bodies to aid in camouflage. Where the internal organs cannot be made transparent, for example in the digestive system, visceral photophores can be found. These visceral photophores are unique to this genus within the family. The paralarvae also have a thick gelatinous dermis covering the mantle, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalocranchia Sp
''Megalocranchia'' is a genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ... of glass squids. It occurs circumglobally in tropical and subtropical waters.Voss N. A., S. J. Stephen & Zh. Dong 1992. Family Cranchiidae Prosch, 1849. ''Smithson. Contributions Zool.'' 513: 187-210. Description Some members of the genus ''Megalocranchia'' can reach large sizes, up to 1800mm in the case of ''M. fisheri''. Young paralarvae often resemble other members of the Cranchiidae, having transparent bodies to aid in camouflage. Where the internal organs cannot be made transparent, for example in the digestive system, visceral photophores can be found. These visceral photophores are unique to this genus within the family. The paralarvae also have a thick gelatinous dermis covering the mantle, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalocranchia Abyssicola
''Megalocranchia'' is a genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ... of glass squids. It occurs circumglobally in tropical and subtropical waters.Voss N. A., S. J. Stephen & Zh. Dong 1992. Family Cranchiidae Prosch, 1849. ''Smithson. Contributions Zool.'' 513: 187-210. Description Some members of the genus ''Megalocranchia'' can reach large sizes, up to 1800mm in the case of ''M. fisheri''. Young paralarvae often resemble other members of the Cranchiidae, having transparent bodies to aid in camouflage. Where the internal organs cannot be made transparent, for example in the digestive system, visceral photophores can be found. These visceral photophores are unique to this genus within the family. The paralarvae also have a thick gelatinous dermis covering the mantle, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalocranchia Maxima
''Megalocranchia'' is a genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ... of glass squids. It occurs circumglobally in tropical and subtropical waters.Voss N. A., S. J. Stephen & Zh. Dong 1992. Family Cranchiidae Prosch, 1849. ''Smithson. Contributions Zool.'' 513: 187-210. Description Some members of the genus ''Megalocranchia'' can reach large sizes, up to 1800mm in the case of ''M. fisheri''. Young paralarvae often resemble other members of the Cranchiidae, having transparent bodies to aid in camouflage. Where the internal organs cannot be made transparent, for example in the digestive system, visceral photophores can be found. These visceral photophores are unique to this genus within the family. The paralarvae also have a thick gelatinous dermis covering the mantle, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalocranchia Oceanica
''Megalocranchia'' is a genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ... of glass squids. It occurs circumglobally in tropical and subtropical waters.Voss N. A., S. J. Stephen & Zh. Dong 1992. Family Cranchiidae Prosch, 1849. ''Smithson. Contributions Zool.'' 513: 187-210. Description Some members of the genus ''Megalocranchia'' can reach large sizes, up to 1800mm in the case of ''M. fisheri''. Young paralarvae often resemble other members of the Cranchiidae, having transparent bodies to aid in camouflage. Where the internal organs cannot be made transparent, for example in the digestive system, visceral photophores can be found. These visceral photophores are unique to this genus within the family. The paralarvae also have a thick gelatinous dermis covering the mantle, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalocranchia Fisheri
''Megalocranchia fisheri'' is a species of glass squid. Its natural range covers at least the waters off Hawaii. The species may attain a mantle length of and a total length of over , Norman, M. 2000. ''Cephalopods: A World Guide''. Hackenheim, ConchBooks, p. 158. making it one of the largest species of squid, together with the colossal squid (''Mesonychoteuthis hamiltoni''), giant squid (''Architeuthis'' sp.), and robust clubhook squid (''Onykia robusta''). It inhabits surface and mid-depth waters of open ocean. Juveniles live near the surface, while adults occupy mesopelagic depths during the day and migrate to near-surface waters at night. ''M. fisheri'' possesses two large light organs in the gill cavity. Females additionally have light organs on the ends of their third arm pair. As the animal matures, its fins become spear-like in appearance. It is possible that this taxon is conspecific with ''Megalocranchia abyssicola'', in which case ''M. fisheri'' would become a juni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glass Squid
The family (biology), family Cranchiidae comprises the approximately 60 species of glass squid, also known as cockatoo squid, cranchiid, cranch squid, or bathyscaphoid squid. Cranchiid squid occur in surface and midwater depths of open oceans around the world. They range in mantle (mollusc), mantle length from to over , in the case of the colossal squid. The common name, glass squid, derives from the Transparency (optics), transparent nature of most species. Cranchiid squid spend much of their lives in partially sunlit shallow waters, where their transparency provides camouflage. They are characterised by a swollen body and short arms, which bear two rows of Sucker (cephalopod anatomy), suckers or hooks. The third cephalopod arm, arm pair is often enlarged. Many species are Bioluminescence, bioluminescent organisms and possess light organs on the undersides of their cephalopod eye, eyes, used to cancel their shadows. Eye morphology varies widely, ranging from large and circular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Johann Pfeffer
Georg Johann Pfeffer (1854–1931) was a German zoologist, primarily a malacologist, a scientist who studies mollusks. Pfeffer was born in Berlin. In 1887 he became curator of the , which was established in 1843 and destroyed during World War II. Pfeffer's published writings were mainly about cephalopods. The World Register of Marine Species database lists 133 marine taxa named by Pfeffer When Pfeffer's name is listed as an authority for a taxon such as the land snail genus '' Lamellaxis'' Strebel & Pfeffer, 1882, his name is ''not'' simply an orthographic error for the more commonly encountered molluscan authority Pfeiffer, i.e. Ludwig Karl Georg Pfeiffer Ludwig Karl Georg Pfeiffer, also known as Louis Pfeiffer (4 July 1805 – 2 October 1877), was a German physician, botanist and conchologist. Early life, Education & Medical Career Louis Pfeiffer was born in Cassel, the eldest son of the jurist ..., who lived 50 years earlier, from 1805 to 1877. Georg Johann Pfeffer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 these criteria. Like all other cephalopods, squid have a distinct head, bilateral symmetry, and a mantle. They are mainly soft-bodied, like octopuses, but have a small internal skeleton in the form of a rod-like gladius (cephalopod), gladius or pen, made of chitin. Squid diverged from other cephalopods during the Jurassic and occupy a similar role to teleost fish as open water predators of similar size and behaviour. They play an important role in the open water food web. The two long tentacles are used to grab prey and the eight arms to hold and control it. The beak then cuts the food into suitable size chunks for swallowing. Squid are rapid swimmers, moving by Aquatic locomotion#Jet propulsion, jet propulsion, and largely locate their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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