Velutina

Velutina
Velutina velutina shell
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
clade Hypsogastropoda
clade Littorinimorpha
Superfamily: Velutinoidea
Family: Velutinidae
Genus: Velutina
Fleming, 1820[1]
Type species
Velutina vulgaris Fleming, 1820
Synonyms[2]

Velutella Gray, 1847

Velutina is a genus of small sea snails, marine gastropod mollusks in the family Velutinidae.[2]

Species

Species within the genus Velutina include:

Species brought into synonymy 

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]

References

This article incorporates public domain text from the reference.[9]

  1. ↑ Fleming (1820). Brewster's Edin. Ency. 14(2): 626.
  2. 1 2 WoRMS (2009). Velutina Fleming, 1822. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138631 on 17 June 2011
  3. ↑ Gofas, S. (2009). Velutina plicatilis (Müller O.F., 1776). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141902 on 2010-08-19
  4. ↑ Gofas, S. (2009). Velutina schneideri Friele, 1886. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141903 on 2010-08-19
  5. ↑ Gofas, S. (2009). Velutina velutina (Müller O.F., 1776). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141905 on 2010-08-19
  6. ↑ Gofas, S. (2009). Velutina insculpta Odhner, 1913. In: Bouchet, P.; Gofas, S.; Rosenberg, G. World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=180997 on 2010-08-19
  7. ↑ Gofas, S. (2009). Velutina lanigera Møller, 1842. In: Bouchet, P.; Gofas, S.; Rosenberg, G. World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141901 on 2010-08-19
  8. ↑ Gofas, S. (2009). Velutina undata Smith J., 1839. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141904 on 2010-08-19
  9. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Tryon G. W. (1886). Manual of Conchology, structural and systematic, with illustrations of the species. Volume 8. Naticidae, Capyptraeidae, Turritellidae, Vermetidae, Caecidae, Eulimidae, Turbonillidae, Pyramidellidae. 461 pp., 79 plates. page 12-13. Plate 1, figure 8.
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