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Otukaia
''Otukaia'' is a genus of medium-sized sea snails, marine gastropod molluscs in the family Calliostomatidae, the top shells. ''Otukaia'' has long been considered a subgenus of Calliostoma and is still treated as such by many authorities. Snails in this genus are characterized by their relatively large, silky-white, thin shell. They lack an umbilicus. Their spiral whorls are flat to slightly convex. The first three spiral cords can show some sculpture that may persist on later whorls. They have a rachidian radula. They can be found worldwide in deep water. Some authors use ''Otukaia'' Ikebe, 1942 as a subgenus in ''Calliostoma'' Swainson, 1840. The (sub)generic name ''Otukaia'' is in honor of the Japanese malacologist Yanosuke Otuka (1903–1950), who described the type species ''Calliostoma kiheiziebisu'' Otuka, 1939. Otuka Y. (1939). "日本産エビスガヒ屬の一新種 A new ''Calliostoma'' from Japan". ''Venus'' 9(1): 27–29CiNii Species The following species are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otukaia
''Otukaia'' is a genus of medium-sized sea snails, marine gastropod molluscs in the family Calliostomatidae, the top shells. ''Otukaia'' has long been considered a subgenus of Calliostoma and is still treated as such by many authorities. Snails in this genus are characterized by their relatively large, silky-white, thin shell. They lack an umbilicus. Their spiral whorls are flat to slightly convex. The first three spiral cords can show some sculpture that may persist on later whorls. They have a rachidian radula. They can be found worldwide in deep water. Some authors use ''Otukaia'' Ikebe, 1942 as a subgenus in ''Calliostoma'' Swainson, 1840. The (sub)generic name ''Otukaia'' is in honor of the Japanese malacologist Yanosuke Otuka (1903–1950), who described the type species ''Calliostoma kiheiziebisu'' Otuka, 1939. Otuka Y. (1939). "日本産エビスガヒ屬の一新種 A new ''Calliostoma'' from Japan". ''Venus'' 9(1): 27–29CiNii Species The following species are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otukaia Kiheiziebisu
''Otukaia kiheiziebisu'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. The type specimens were collected by amateur conchologist Mr. Kiheizi Oosima in 1938. The specific name ''kiheiziebisu'' is in honour of him. The new species was originally described as ''Calliostoma kiheiziebisu'' by the Japanese malacologist Yanosuke Otuka (1903-1950) in 1939. ''Otukaia kiheiziebisu'' is the type species of the genus '' Otukaia'' Ikeba, 1942. Some authors recognize ''Otukaia'' as a separate genus.Vilvens & Sellanes (2006). '' The Nautilus'' 120(1): 15-20. Description The shell is large, conical, thin, semitransparent, pale cinnamon pink in colour with pearly lustre. The shell has 8.5 whorls. One and a half coils of nuclear portion of whorls are rounded in outline, smooth, polished on the surface. Subsequent whorls are sculptured with four strong, beaded spiral keels and very fine lines, which are only visible under a magnifying lens, and with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otukaia Ikukoae
''Otukaia ikukoae'' is a deepwater sea snail, a marine gastropod mollusc in the family Calliostomatidae, the calliostoma top snails. Distribution Okinawa Trough The (also called , literally China-Ryukyu Border Trough ) is a seabed feature of the East China Sea. It is an active, initial back-arc rifting basin which has formed behind the Ryukyu arc-trench system in the West Pacific. It developed where th .... Ecology It was recorded 962 m deep. References External links Calliostomatidae Gastropods described in 1994 {{Calliostomatidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otukaia Beringensis
''Otukaia beringensis'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Calliostomatidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetail ... within the superfamily Trochoidea, the top snails, turban snails and their allies.MolluscaBase (2018). ''Otukaia beringensis'' Tuskes & R. Clark, 2018. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1308693 on 2018-12-28Tuskes P.M. & Clark R. (2018). A new species of Otukaia (Calliostomatidae) from Alaska. The Festivus. 50(4): 236-238. Distribution This species occurs in Aleutian Islands. References Calliostomatidae {{Calliostomatidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurea Delli
''Maurea delli'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Calliostomatidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetail ... within the superfamily Trochoidea, the top snails, turban snails and their allies.MolluscaBase (2018). ''Maurea delli'' (McLean & Andrade, 1982). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=881071 on 2018-12-28 References Calliostomatidae {{Calliostomatidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurea Alertae
''Maurea alertae'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Calliostomatidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetail ... within the superfamily Trochoidea, the top snails, turban snails and their allies.MolluscaBase (2018). ''Maurea alertae'' (B. A. Marshall, 1995). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1264397 on 2018-12-28 References Calliostomatidae {{Calliostomatidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margarites Rossicus
''Margarites rossicus'', common name : the pearly margarite, is a species of sea snail, a marine gastropod mollusk in the family Margaritidae. There are two subspecies: * ''Margarites rossicus derjugini'' Galkin, 1955 x Bartsch MS/small> * ''Margarites rossicus rossicus'' Dall, 1919 Some authors place this species in the subgenus ''Margarites (Pupillaria)'' Description The shell grows to a length of 32 mm, its diameter 30 mm. The large, solid shell has a trochiform shape. It has a pale gray color over a brilliant nacre. It contains 8 whorls, including a small pinkish nucleus of two whorls. The spiral sculpture consists of (on the spire three) strong blunt keels, of which two near the periphery are the most prominent, with subequal wide interspaces. There is a fourth less prominent one on which the suture is laid which only shows on the body whorl. On the base there are about 10 smaller cords irregularly spaced. The axis is perforate by a narrow twisted umbilicus. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurea Eltanini
''Maurea eltanini'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Calliostomatidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetail ... within the superfamily Trochoidea, the top snails, turban snails and their allies.MolluscaBase (2018). ''Maurea eltanini'' (Dell, 1990). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=881072 on 2018-12-28 Distribution This species occurs in New Zealand Exclusive Economic Zone. References Calliostomatidae {{Calliostomatidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calliotropis Crustulum
''Calliotropis crustulum'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. This species occurs off Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a .... References External links * crustulum Gastropods described in 2006 Endemic fauna of Chile {{Seguenzioidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calliostomatidae
Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Calliostomatidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=382180 on 2013-07-08 Description The Calliostomatidae are unusually diverse. They are characterized by a stepped spire and a pointy aperture. They may possess or lack an umbilicus. The collumella is sometimes thicker, partially covering the aperture. The spiral whorls can differ between narrow and robust. They inhabit a wide range of ocean habitats, from the intertidal zone to mid- bathyal depths. Taxonomy This taxon was long considered to be a subfamily of the Trochidae. 2005 taxonomy This family consists of two following subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005): * subfamily Calliostomatinae Thiele 1924 (1847) ** tribe Calliostomatini Thiele 1924 (1847) - synonym: Ziziphininae G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurea Chilena
''Maurea chilena'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Calliostomatidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetail ... within the superfamily Trochoidea, the top snails, turban snails and their allies.MolluscaBase (2018). ''Maurea chilena'' (Rehder, 1971). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=881069 on 2018-12-28 References Calliostomatidae {{Calliostomatidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whorl (mollusc)
A whorl is a single, complete 360° revolution or turn in the spiral growth of a mollusc shell. A spiral configuration of the shell is found in numerous gastropods, but it is also found in shelled cephalopods including ''Nautilus'', ''Spirula'' and the large extinct subclass of cephalopods known as the ammonites. A spiral shell can be visualized as consisting of a long conical tube, the growth of which is coiled into an overall helical or planispiral shape, for reasons of both strength and compactness. The number of whorls which exist in an adult shell of a particular species depends on mathematical factors in the geometric growth, as described in D'Arcy Wentworth Thompson's classic 1917 book ''On Growth and Form'', and by David Raup. The main factor is how rapidly the conical tube expands (or flares-out) over time. When the rate of expansion is low, such that each subsequent whorl is not that much wider than the previous one, then the adult shell has numerous whorls. When the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
