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Laevipilinidae
''Laevipilina'' is a genus of monoplacophoran Monoplacophora , meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell inhabiting deep sea environments . Extant representatives were not recognized as such until 1952; previously they were known only from th ... molluscs. They are very small, mostly deepwater animals which have a superficially limpet-like shell.Schwabe, Enrico (2008)A summary of reports of abyssal and hadal Monoplacophora and Polyplacophora (Mollusca) In: Martínez Arbizu, P. & Brix, S. (Eds) (2008) Bringing Light into Deep-sea Biodiversity. ''Zootaxa'', 1866, 1–574. All species are at approximately 2–3 mm in length, have 5 pairs of gills (except for '' Laevipilina hyalina'', which has 6 pairs), and have 4-5 intestinal coils. Species * '' Laevipilina antarctica'' Warén & Hain, 1992 * '' Laevipilina cachuchensis'' Urgorri, García-Álvarez & Luque, 2005 * '' Laevipilina hyalina'' (McLean, 1979) * '' Laevipilina rolan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monoplacophora
Monoplacophora , meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell inhabiting deep sea environments . Extant representatives were not recognized as such until 1952; previously they were known only from the fossil record, and were thought to have become extinct 375 million years ago. Although the shell of many monoplacophorans is limpet-like in shape, they are not gastropods, nor do they have any close relation to gastropods. Definition Discussion about monoplacophorans is made difficult by the slippery definition of the taxon; some authors take it to refer to all non-gastropod mollusks with a single shell, or all single-shelled mollusks with serially repeated units; whereas other workers restrict the definition to cap-shaped forms, excluding spiral and other shapes of shell. The inclusion of the gastropod-like Bellerophontoidea within the group is also contentious. One attempt to resolve this confusion was to separate out the predom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tryblidiida
Tryblidiida is a taxon of monoplacophoran molluscans containing the only extant representatives: 37 species are still alive today, inhabiting the ocean at depths of between . History of discoveries The first captured living monoplacophoran was ''Veleropilina zografi'' in 1896, but at that time it was described as if it were an archaeogastropod, a true limpet, mainly because of its patelliform (limpet-like) shell. This species was finally revealed to be monoplacophoran 87 years later, in 1983. In April 1952, a living specimen was collected from deep depths in the Middle America Trench off Costa Rica's Pacific coast. In 1957 that species was described and named ''Neopilina galatheae'' by its discoverer, Danish biologist Henning Mourier Lemche (1904–1977). An expert in the field has called this discovery "one of the greatest sensations in the [twentieth] century."Schwabe, above, at p. 205. As of 2008, there were 31 living species known, discovered in waters from 200 meters in de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neopilinidae
Tryblidiida is a taxon of monoplacophoran molluscans containing the only extant representatives: 37 species are still alive today, inhabiting the ocean at depths of between . History of discoveries The first captured living monoplacophoran was '' Veleropilina zografi'' in 1896, but at that time it was described as if it were an archaeogastropod, a true limpet, mainly because of its patelliform (limpet-like) shell. This species was finally revealed to be monoplacophoran 87 years later, in 1983. In April 1952, a living specimen was collected from deep depths in the Middle America Trench off Costa Rica's Pacific coast. In 1957 that species was described and named ''Neopilina galatheae'' by its discoverer, Danish biologist Henning Mourier Lemche (1904–1977). An expert in the field has called this discovery "one of the greatest sensations in the wentiethcentury."Schwabe, above, at p. 205. As of 2008, there were 31 living species known, discovered in waters from 200 meters in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monoplacophoran
Monoplacophora , meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell inhabiting deep sea environments . Extant representatives were not recognized as such until 1952; previously they were known only from the fossil record, and were thought to have become extinct 375 million years ago. Although the shell of many monoplacophorans is limpet-like in shape, they are not gastropods, nor do they have any close relation to gastropods. Definition Discussion about monoplacophorans is made difficult by the slippery definition of the taxon; some authors take it to refer to all non-gastropod mollusks with a single shell, or all single-shelled mollusks with serially repeated units; whereas other workers restrict the definition to cap-shaped forms, excluding spiral and other shapes of shell. The inclusion of the gastropod-like Bellerophontoidea within the group is also contentious. One attempt to resolve this confusion was to separate out the predomin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinoderms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusca
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant taxon, extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine biology, marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater mollusc, freshwater and Terrestrial molluscs, terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 Taxonomy (biology), taxonomic class (biology), classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurobiology, neurologically advanced of all inve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laevipilina Antarctica
''Laevipilina antarctica'' is a species of monoplacophoran, a superficially limpet-like marine mollusk. It is found in the Weddell Sea and the Lazarev Sea of Antarctica.Schwabe, Enrico (2008)A summary of reports of abyssal and hadal Monoplacophora and Polyplacophora (Mollusca) In: Martínez Arbizu, P. & Brix, S. (Eds) (2008) Bringing Light into Deep-sea Biodiversity. ''Zootaxa'', 1866, 1–574. Evolution In 2006, a molecular study on ''Laevipilina antarctica'' suggested that extant Monoplacophora and Polyplacophora form a well-supported clade with the researched ''Neopilina'' closest to the chitons. The two classes in this new clade, with the proposed name Serialia, all show a variable number of serially repeated gill A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are ...s and eig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laevipilina Cachuchensis
''Laevipilina cachuchensis'' is a species of monoplacophoran, a superficially limpet-like marine mollusk. Two live specimens were collected off the coast of Asturias Asturias (, ; ast, Asturies ), officially the Principality of Asturias ( es, Principado de Asturias; ast, Principáu d'Asturies; Galician-Asturian: ''Principao d'Asturias''), is an autonomous community in northwest Spain. It is coextensiv ..., northern Spain during the ''Fauna Ibérica II'' expedition in 1991. References Monoplacophora Molluscs described in 2005 {{mollusc-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laevipilina Hyalina
''Laevipilina hyalina'' is a species of monoplacophoran, a superficially limpet-like marine mollusk. It is found off the coast of southern California Southern California (commonly shortened to SoCal) is a geographic and cultural region that generally comprises the southern portion of the U.S. state of California. It includes the Los Angeles metropolitan area, the second most populous urban a ....McLean, J.H. 1979. A new monoplacophoran limpet from the continental shelf off Southern California. ''Contributions in Science, Natural History Museum of Los Angeles County'', 307: 1–19. Anatomy ''L. hyalina'' is the only '' Laevipilina'' species with 6 pairs of gills, while all other '' Laevipilina'' species have 5 pairs. References Monoplacophora Molluscs described in 1979 {{mollusc-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laevipilina Rolani
''Laevipilina rolani'' is a species of monoplacophoran, a superficially limpet-like marine mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e .... It is found off the northern coast of Spain.URGORRI, V. & TRONCOSO, J.S. 1994. A second record of Laevipilina rolani Ware´n & Bouchet, (Mollusca: Monoplacophora) from the Northwest of Spain. ''Journal of Molluscan Studies'', 60: 157–163. References Monoplacophora Molluscs described in 1990 {{mollusc-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laevipilina Theresae
''Laevipilina theresae'' is a species of monoplacophoran, a superficially limpet-like marine mollusk. It is known from a live specimen collected in the Eastern Weddell Sea of Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest cont ....Schrödl, M. (2006). ''Laevipilina theresae'', a new monoplacophoran species from Antarctica (Mollusca). ''Spixiana'' 29/3: 225-227. References Monoplacophora Molluscs described in 2006 {{mollusc-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
