| 词条 | Velutina |
| 释义 |
| image = Velutina laevigata (Sowerby).jpg | image_caption = Velutina velutina shell | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Caenogastropoda clade Hypsogastropoda clade Littorinimorpha | superfamilia = Velutinoidea | familia = Velutinidae | subfamilia = | genus = Velutina | genus_authority = Fleming, 1820[1] | synonyms_ref = [2] | synonyms = *Velutella Gray, 1847 | type_species = Velutina vulgaris | type_species_authority = Fleming, 1820 }}Velutina is a genus of small sea snails, marine gastropod mollusks in the family Velutinidae.[2] SpeciesSpecies within the genus Velutina include:
DescriptionThe shell is thin, mostly external, calcareous, auriform, paucispiral and invested by a velvety epidermis.[10] The spire is lateral and diminutive.[10] The suture is well impressed.[10] The aperture is very large and rounded with the thin, almost continuous lip.[10] The columellar lip is a little reflected.[10] There is no operculum or umbilicus.[10] The oval animal is convex above and little spiral. It has a large oblong foot.[10] The margin of the mantle is developed and more or less reflected over the edge of the shell.[10] The head is broad and depressed.[10] The two large tentacles are subulate, blunt, far apart, with eyes sessile on prominences at their outer bases.[10] The mouth has a short tube. The formula of the radula is 2·1·1·1·2.[10] 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.[10] Species in the genus Velutina resemble the pulmonate genus Otina, but Velutina are strictly marine.[10] Sometimes they are found out at sea, but usually live among stones near low tide.[10] ReferencesThis article incorporates public domain text from the reference.[9] 1. ^Fleming (1820). Brewster's Edin. Ency. 14(2): 626. {{taxonbar|from=Q3175410}}2. ^1 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 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 [https://archive.org/stream/manualconch08tryorich#page/12/mode/2up/ 12-13]. [https://archive.org/stream/manualconch08tryorich#page/n468/mode/1up Plate 1], figure 8. 1 : Velutinidae |
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