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Neopilina
''Neopilina'' is a highly derived genus of modern monoplacophoran.Organisms, Genes and Evolution: Evolutionary Theory at the Crossroads ; Proceedings of the 7th International Senckenberg Conference. By Dieter Stefan Peters, Michael Weingarten. Contributor: Dieter Stefan Peters. Published by Franz Steiner Verlag, 2000. , 9783515076593. 243 pages. Species * '' Neopilina bruuni'' Menzies, 1968 * '' Neopilina galatheae'' Lemche, 1957 * '' Neopilina rebainsi'' Moskalev, Starobogatov & Filatova, 1983 * ''Neopilina starobogatovi'' Ivanov & Moskalev, 2007 Phylogeny Some molecular results show that they fall within the polyplacophoran clade, although these results have been called into question. Fossil and morphological data show that they are rather derived and bear very little resemblance to an 'ancestral mollusc'. Anatomy Its anatomy led researchers to believe that the cephalopods evolved from the Monoplacophora. Its pair of preoral tentacles are considered homologous to those o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neopilina Sp
''Neopilina'' is a highly derived genus of modern monoplacophoran.Organisms, Genes and Evolution: Evolutionary Theory at the Crossroads ; Proceedings of the 7th International Senckenberg Conference. By Dieter Stefan Peters, Michael Weingarten. Contributor: Dieter Stefan Peters. Published by Franz Steiner Verlag, 2000. , 9783515076593. 243 pages. Species * '' Neopilina bruuni'' Menzies, 1968 * '' Neopilina galatheae'' Lemche, 1957 * '' Neopilina rebainsi'' Moskalev, Starobogatov & Filatova, 1983 * ''Neopilina starobogatovi'' Ivanov & Moskalev, 2007 Phylogeny Some molecular results show that they fall within the polyplacophoran clade, although these results have been called into question. Fossil and morphological data show that they are rather derived and bear very little resemblance to an 'ancestral mollusc'. Anatomy Its anatomy led researchers to believe that the cephalopods evolved from the Monoplacophora. Its pair of preoral tentacles are considered homologous to those o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neopilina Galatheae
''Neopilina galatheae'' is a species of monoplacophoran, a superficially limpet-like marine mollusc. Its name means new ''Pilina'' (after ''Pilina'', an extinct monoplacophoran species that lived about 400 million years ago). It lives in depths of 5000 meters and the shell is 3 centimeters in length in adults. The species was discovered off the Pacific coast of Costa Rica in the 1950s, where 10 specimens were collected. Later, additional specimens have been collected off the coast of Chile and off Cabo San Lucas, Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ..., Mexico.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 Biodiversi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neopilina Rebainsi
''Neopilina rebainsi'' is a species of monoplacophoran, a superficially limpet-like marine mollusc. The holotype was collected southeast of the Falkland Islands in the Southern Atlantic Ocean.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. They are dioecious Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproducti ... organisms. References Monoplacophora Molluscs described in 1983 {{mollusc-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neopilina Starobogatovi
''Neopilina starobogatovi'' is a species of monoplacophoran, a superficially limpet-like marine mollusc 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 est .... References Monoplacophora Molluscs described in 2007 {{mollusc-stub ... [...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] |
Okeanos Explorer
NOAAS ''Okeanos Explorer'' (R 337) is a converted United States Navy ship (formerly ), now an exploratory vessel for the National Oceanic and Atmospheric Administration (NOAA), officially launched in 2010. Starting in 2010, NOAA entered into a five-year partnership with the San Francisco Exploratorium. The focus is on gathering scientific information about oceans for the public as well as for scientific uses. As much as 95% of the ocean remains unexplored, NOAA officials said. The ship is equipped with cameras and will provide real-time viewing of the ocean floor for scientists and for the public. This is a pioneering use of what NOAA calls " telepresence technology". The ''Okeanos Explorer'' is the only vessel owned by the U.S. government that is dedicated to exploring the seabed and ocean crust. The ship is named after Okeanos, the Ancient Greek god of the sea, from which also comes the word "ocean". Description The converted vessel is covered with cameras capable of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neopilina Bruuni
''Neopilina bruuni'' is a species of monoplacophoran, a superficially limpet-like marine mollusc 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 est .... It is found in the southeastern Pacific Ocean, off the coast of South America.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. References Monoplacophora Molluscs described in 1968 {{mollusc-stub ... [...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 ide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoological Museum, Copenhagen
The Copenhagen Zoological Museum ( Danish: ''Zoologisk Museum'') is a part of the Natural History Museum of Denmark, which is affiliated with the University of Copenhagen. History The Zoological Museum It is among the world's oldest natural history museums, as its collection was started by Ole Worm more than 350 years ago, although it was officially founded in 1862. Collections The zoological collections contain some 10 million specimens representing an estimated 10 % of described multicellular animal species. The history of the collections reach back in time more than 200 years. Apart from rich collections of Danish animals, the museum has strong representation of: * The North Atlantic and Arctic (especially Greenland) * The former Danish colonies in the West Indies * East Africa (especially the Eastern Arc mountains) * South American insects (especially butterflies) * Philippines, Bismarck and Solomon Islands * Deep Sea faunas * Whale skeletons * Material from several expe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nacre
Nacre ( , ), also known as mother of pearl, is an organicinorganic composite material produced by some molluscs as an inner shell layer; it is also the material of which pearls are composed. It is strong, resilient, and iridescent. Nacre is found in some of the most ancient lineages of bivalves, gastropods, and cephalopods. However, the inner layer in the great majority of mollusc shells is porcellaneous, not nacreous, and this usually results in a non-iridescent shine, or more rarely in non-nacreous iridescence such as ''flame structure'' as is found in conch pearls. The outer layer of cultured pearls and the inside layer of pearl oyster and freshwater pearl mussel shells are made of nacre. Other mollusc families that have a nacreous inner shell layer include marine gastropods such as the Haliotidae, the Trochidae and the Turbinidae. Physical characteristics Structure and appearance Nacre is composed of hexagonal platelets of aragonite (a form of calcium carb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ctenidium (mollusc)
A ctenidium is a respiratory organ or gill which is found in many molluscs. This structure exists in bivalves, cephalopods, Polyplacophorans (chitons), and in aquatic gastropods such as freshwater snails and marine snails. Some aquatic gastropods possess one ctenidium known as monopectinate and others have a pair of ctenidia known as bipectinate. A ctenidium is shaped like a comb or a feather, with a central part from which many filaments or plate-like structures protrude, lined up in a row. It hangs into the mantle cavity and increases the area available for gas exchange. The apple snail. Retrieved 2012-04-20. The word is Latinized but is derived from the ''ktenidion'' which means "li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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