Velutina
Genus of gastropods
From Wikipedia, the free encyclopedia
Velutina is a genus of small sea snails, marine gastropod mollusks in the family Velutinidae.[2]
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| Velutina | |
|---|---|
| |
| Velutina velutina shell | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Velutinidae |
| Genus: | Velutina Fleming, 1820[1] |
| Type species | |
| Velutina vulgaris Fleming, 1820 | |
| Synonyms[2] | |
| |
Species
Species within the genus Velutina include:
- Velutina coriacea (Pallas, 1788)
- Velutina cryptospira Middendorff, 1848
- Velutina plicatilis (Müller, 1776)[3]
- Velutina pulchella Derjugin, 1950
- Velutina schneideri Friele, 1886[4]
- Velutina tarasovi Derjugin, 1950
- Velutina velutina (Müller, 1776)[5]
- Species brought into synonymy
- Velutina beringensis Derjugin, 1950 : synonym of Cartilagovelutina beringensis (Derjugin, 1950)
- Velutina bifasciata Derjugin, 1950 : synonym of Limneria undata (T. Brown, 1839)
- Velutina canaliculata Kröyer, 1847 : synonym of Limneria undata (T. Brown, 1839)
- Velutina capillata Derjugin, 1950 : synonym of Ciliatovelutina capillata (Derjugin, 1950)
- Velutina capuloidea Blainville, 1824 : synonym of Velutina velutina (O. F. Müller, 1776)
- Velutina chondrina Bartsch in Derjugin, 1950 : synonym of Cartilagovelutina chondrina (Bartsch in Derjugin, 1950)
- Velutina conica Dall, 1886 : synonym of Velutina prolongata Carpenter, 1864
- Velutina cristata Derjugin, 1950 : synonym of Cartilagovelutina cristata (Derjugin, 1950)
- Velutina derjugini Bartsch in Derjugin, 1950 : synonym of Velutina prolongata Carpenter, 1864
- Velutina flexilis (Montagu, 1808) : synonym of Velutina plicatilis (O. F. Müller, 1776)
- Velutina fraudatrix Golikov & Kussakin, 1962 : synonym of Velutina tarasovi Derjugin, 1950
- Velutina glabrata Golikov & Kussakin, 1962 : synonym of Velutina coriacea (Pallas, 1788)
- Velutina haliotidea (Fabricius, 1780) : synonym of Velutina velutina (O. F. Müller, 1776)
- Velutina insculpta Odhner, 1913[6] Limneria insculpta (Odhner, 1913)
- Velutina laevigata "(O. F. Müller, 1777)": synonym of Velutina velutina (O. F. Müller, 1776)
- Velutina lanata Derjugin, 1950 : synonym of Ciliatovelutina lanata (Derjugin, 1950)
- Velutina lanigera Møller, 1842:[7] synonym of Ciliatovelutina lanigera (Møller, 1842)
- Velutina litoralis Golikov & Kussakin, in Golikov & Scarlato, 1967 : synonym of Velutina coriacea (Pallas, 1788)
- Velutina nana Derjugin, 1950 : synonym of Ciliatovelutina nana (Derjugin, 1950)
- Velutina ochotensis Derjugin, 1950 : synonym of Limneria undata (T. Brown, 1839)
- Velutina pellucida Derjugin, 1950 : synonym of Velutina coriacea (Pallas, 1788)
- Velutina prolongata Carpenter, 1864 : synonym of Limneria prolongata (Carpenter, 1864)
- Velutina rupicola Conrad, 1831 : synonym of Velutina velutina (O. F. Müller, 1776)
- Velutina schantarica Derjugin, 1950 : synonym of Velutina cryptospira Middendorff, 1848
- Velutina sitkensis A. Adams, 1853 : synonym of Velutina plicatilis (O. F. Müller, 1776)
- Velutina striata Macgillivray, 1843 : synonym of Velutina velutina (O. F. Müller, 1776)
- Velutina undata Smith J., 1839:[8] synonym of Limneria undata (T. Brown, 1839)
- Velutina ventricosa Golikov, in Golikov & Scarlato, 1985 : synonym of Velutina coriacea (Pallas, 1788)
- Velutina vulgaris Fleming, 1820 : synonym of Velutina velutina (O. F. Müller, 1776)
- Velutina zonata Gould, 1841 : synonym of Limneria undata (T. Brown, 1839)
Description
The shell is thin, mostly external, calcareous, auriform, paucispiral and invested by a velvety epidermis.[9] The spire is lateral and diminutive.[9] The suture is well impressed.[9] The aperture is very large and rounded with the thin, almost continuous lip.[9] The columellar lip is a little reflected.[9] There is no operculum or umbilicus.[9]
The oval animal is convex above and little spiral. It has a large oblong foot.[9] The margin of the mantle is developed and more or less reflected over the edge of the shell.[9] The head is broad and depressed.[9] The two large tentacles are subulate, blunt, far apart, with eyes sessile on prominences at their outer bases.[9] The mouth has a short tube.
The formula of the radula is 2·1·1·1·2.[9] The central tooth is subquadrangular, multicuspid; the central cusps are very long and sharp; lateral teeth are multicuspid, marginals are narrow, with a few obsolete denticles on the margin.[9]
Species in the genus Velutina resemble the pulmonate genus Otina, but Velutina are strictly marine.[9] Sometimes they are found out at sea, but usually live among stones near low tide.[9]