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Asthelys
''Asthelys'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Seguenziidae. Description The conical shell lacks axial riblets and a peripheral carina but has a punctate microsculpture. The midwhorl angulation is initially absent, but present on later Whorl (mollusc), whorls. The shell contains no spiral Lira (mollusc), lirae. The U-shaped posterior sinus is shallow. The basal sinus is present, but there is no anterolateral sinus. The Columella (gastropod), columella has no sinus or tooth. Tha Aperture (mollusc), aperture has a rhomboidal shape. There is no umbilical septum. Radula: the rachidian tooth is broader than high and has lateral wings prominent. The lateral tooth cusp is broad. There are less than 10 marginal tooth pairs. Species Species within the genus ''Asthelys'' include: * ''Asthelys antarctica'' Marshall, 1988 * ''Asthelys careyi'' Geiger, 2017 * ''Asthelys depressa'' Marshall, 1991 * ''Asthelys hyeresensis'' Hoff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthelys Careyi
''Asthelys'' is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae. Description The conical shell lacks axial riblets and a peripheral carina but has a punctate microsculpture. The midwhorl angulation is initially absent, but present on later whorls. The shell contains no spiral lirae. The U-shaped posterior sinus is shallow. The basal sinus is present, but there is no anterolateral sinus. The columella has no sinus or tooth. Tha aperture has a rhomboidal shape. There is no umbilical septum. Radula: the rachidian tooth is broader than high and has lateral wings prominent. The lateral tooth cusp is broad. There are less than 10 marginal tooth pairs. Species Species within the genus ''Asthelys'' include: * '' Asthelys antarctica'' Marshall, 1988 * '' Asthelys careyi'' Geiger, 2017 * '' Asthelys depressa'' Marshall, 1991 * ''Asthelys hyeresensis ''Asthelys'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthelys Munda
''Asthelys munda'' is a species of sea snail, a marine gastropod mollusk in the family Seguenziidae. This species is spelled as ''Asthelys mundus'' in CLEMAM. Description (Original description by Watson) The height of the shell attains 3.3 mm. The shell is broadly conical, flat on the base, and sharply angulated. It is small, thin, delicate, smooth, glossy, and nacreous under a thin white calcareous surface. Sculpture: There are longitudinals, which are very faint but still sharp, sinuated, showing the old lines of growth. There are over the whole surface very faint traces of spirals. At the bottom of each whorl, about 0.25 mm. above the suture, is a sharp narrow thread, which on the body whorl is bordered below by a second, rather higher and sharper, which forms the carina, and which on the spire is buried by the overlap of the succeeding whorl. On the base of the shell there are about eleven fine spirals, within which is a strong furrow, and a projecting, crenulate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthelys Simplex
''Asthelys simplex'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.Rosenberg, G. (2012). ''Asthelys simplex'' (Watson, 1879). Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492405 on 2013-04-14 Description The shell grows to a height of 6.5 mm. The shell is a rather narrow flat-based cone that is sharply angulated. The shell is small, thin, delicate, smooth, glassy, and nacreous under a thin white calcareous surface. Sculpture: There are longitudinals, which are faint, hairlike and sinuated, showing the old lines of growth. The whole surface has traces of faint, rounded, and irregular spirals. At the bottom of each whorl is a flat puckered band about 0.25 mm. broad, whose upper edge projects sharply, especially on the upper whorls, and whose lower edge is a slight narrow flange, which forms a sharp carina at the periphery. This band forms the u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthelys Semiplicata
''Asthelys semiplicata'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2012). ''Asthelys semiplicata'' Marshall, 1991. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492310 on 2013-04-14Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS) Distribution This marine species occurs off New Caledonia, the Loyalty Islands and off Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ..., Australia at depths between 1330 m and 1620 m. References * Marshall B.A. (1991). ''Mollusca Gastropoda : Seguenziidae from New Caledonia and the Loyalty Islands''. In A. Crosnier & P. Bouchet (Eds) Résultats ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthelys Depressa
''Asthelys depressa'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2012). ''Asthelys depressa''. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492311 on 2013-04-14Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS) Distribution This marine species occurs off New Caledonia and the Loyalty Islands Loyalty Islands Province (, ) is one of the three top-level administrative subdivisions of New Caledonia. It encompasses the Loyalty Islands () archipelago in the Pacific Ocean, located northeast of the New Caledonian mainland of Grande Terre. .... References ;Notes ;Sources * Marshall B.A. (1991). ''Mollusca Gastropoda : Seguenziidae from New Caledonia and the Loyalty Islands.'' In A. Crosnier & P. Bouchet (Eds) Résultats des campagnes Musorstom, vol. 7. Mémoires du Muséum National d'His ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthelys Antarctica
''Asthelys antarctica'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.Rosenberg, G. (2012). ''Asthelys antarctica''. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492407 on 2013-04-14 Description The shell attains a height of 5.8 mm. Distribution This species occurs in Antarctic waters off the South Shetland Islands at a depth of about 3700 m. References Malacolog: ''Asthelys antarctica'' External links Antarctic InvertebratesEncyclopedia of LifeUSNM Invertebrate Zoology Mollusca CollectionWorld Register of Marine Species antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean (also known as the Antarctic Ocean), it contains the geographic South Pole. ... Gastropods described in 1988 {{Seguenziidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthelys Nitidula
''Asthelys nitidula'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2012). ''Asthelys nitidula''. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492309 on 2013-04-14Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS) References * Marshall B.A. (1991). ''Mollusca Gastropoda : Seguenziidae from New Caledonia and the Loyalty Islands''. In A. Crosnier & P. Bouchet (Eds) Résultats des campagnes Musorstom, vol. 7. Mémoires du Muséum National d'Histoire Naturelle, A, 150:41-109. External links Encyclopedia of LifeWorld Register of Marine Species nitidula ''Nitidula'' is a genus of sap-feeding beetles in the family Nitidulidae The sap beetles, also known as Nitidulidae, are a family of beetles. They are small (2–6 mm) ovoid, usually dull-coloured beetles, with knobbed antennae. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seguenziidae
Seguenziidae is a family (biology), family of very small deepwater sea snails, marine (ocean), marine gastropod mollusks in the superfamily Seguenzioidea (according to the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P. (2012). Seguenziidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=23116 on 2013-03-26 Distribution Species from this family occur in the Atlantic Ocean, the Pacific Ocean, the Indian Ocean and the Antarctic Ocean, mostly at bathyal and abyssal depths. Only a few species have been found at depths less than 300 m and none at intertidal depths. Description The thin, translucent, white shell has a trochiform shape. They are small or very small. Their maximum height is 22 mm. They are usually nacreous. The inner Lip (gastropod), lip has often a tooth-like fold. The outer lip has characteristically one to three concave notches (exc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (; : radulae or radulas) is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus. The radula is unique to the mollusks, and is found in every class of mollusk except the bivalves, which instead use cilia, waving filaments that bring minute organisms to the mouth. Within the gastropods, the radula is used in feeding by both herbivorous and carnivorous snails and slugs. The arrangement of teeth ( denticles) on the radular ribbon varies considerably from one group to another. In most of the more ancient lineages of gastropods, the radula is used to graze, by scraping diatoms and other microscopic algae off rock surfaces and other substrates. Predatory marine snails such as the Naticidae use the radula plus an acidic secretion to bore through the shell of other mollusks. Other predatory marine snails, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Boog Watson
Robert Boog Watson Fellow of the Royal Society of Edinburgh, FRSE (26 September 1823 – 23 June 1910) was a Scottish malacology, malacologist and Minister (Christianity), minister of the Free Church of Scotland (1843–1900), Free Church of Scotland best known as the author of the report on the Tusk shell, Scaphopoda and Gastropoda collected during the Challenger expedition, H.M.S. ''Challenger'' expedition to survey the world's oceans from 1873 to 1876. Watson also described various Opisthobranchia from Madeira. Life He was born in Burntisland in Fife, the son of the Rev Dr Charles Watson DD (1794-1866) of Burntisland and Isabella Boog. His brother, Sir Patrick Heron Watson was an eminent surgeon and a pioneer of modern dentistry. The family moved permanently to Edinburgh around 1840, living at 19 Royal Terrace on Calton Hill. He was educated at Edinburgh Academy. He served as Chaplain to the Highland Brigade during the Crimean War, and later in Madeira. In 1858 he was livi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
