Velutinidae is a family of small sea snails, marine gastropod molluscs in the clade Littorinimorpha.
The shell of these animals is very thin and delicate, and internal, completely covered by the mantle (which has fused lobes) so the appearance of these animals more closely resembles that of sea slugs rather than sea snails.
Taxonomy
The following two subfamilies were recognized in the taxonomy of Bouchet & Rocroi (2005):
Subfamily Velutininae J. E. Gray, 1840 - synonyms: Marseniidae Leach in Gray, 1847; Marsenininae Odhner, 1913; Capulacmaeinae Golikov & Gulbin, 1990; Onchidiopsinae Golikov & Gulbin, 1990 (n.a.); Marseniopsidae Badel, 1993 (n.a.) Subfamily Lamellariinae A. D. d'Orbigny, 1841 - synonyms: Coriocellidae Troschel, 1848; Sacculidae Thiele, 1929 (inv.); Pseudosacculidae Kuroda, 1933
Genera
Genera within the family Velutinidae include: Calyptoconcha Calyptoconcha pellucida A. E. Verrill, 1880 - translucent lamellaria Cartilagovelutina Golikov & Gulbin, 1990 Cartilagovelutina beringensis (Derjugin, 1950) Cartilagovelutina chondrina (Bartsch in Derjugin, 1950) Cartilagovelutina cristata (Derjugin, 1950) Ciliatovelutina Golikov & Gulbin, 1990 Cilifera Golikov & Gulbin, 1990 Coriocella Blainville, 1824 Echinospira Krohn, 1853 Lamellaria G. Montagu, 1815 Lamellariopsis Vayssière, 1906 Limneria H. Adams & A. Adams, 1851 Marseniella Bergh, 1886 Marseniella borealis Bergh, 1886 Marsenina Gray, 1850 Marseniopsis Bergh, 1886 Mysticoncha Allan, 1936 Onchidiopsis Bergh, 1853 Onchidiopsis glacialis M. Sars, 1851 - icy lamellaria Onchidiopsis latissima Odhner, 1913 Onchidiopsis spitzbergensis Jensen, in Thorson, 1944 Piliscus Lovén, 1859 Piliscus commodus Middendorff, 1851 Piliscus rostratus (Golikov & Gulbin, 1990) Piliscus undulatus (Golikov & Gulbin, 1990) Pseudosacculus Hirase, 1928 Pseudotorellia Warén, 1989 Pseudotorellia fragilis Warén, 1989 Torellivelutina McLean, 2000 Velutina Fleming, 1820 Velutina plicatilis (Müller, 1776) Velutina schneideri Friele, 1886 Velutina velutina (Müller, 1776)
Subfamily Lamellariinae A. D. d'Orbigny, 1841
Subfamily Velutininae Gray, 1840
Genera brought into synonymy
Capulacmaea M. Sars, 1859 : synonym of Piliscus Lovén, 1859
Chelinotus Swainson, 1840: synonym of Coriocella Blainville, 1824
Cryptocella H. Adams & A. Adams, 1853: synonym of Lamellaria Montagu, 1815
Marsenia Oken, 1823: synonym of Lamellaria Montagu, 1815
Marvillia [sic]: synonym of Limneria H. Adams & A. Adams, 1851
Morvillia Gray, 1857: synonym of Limneria H. Adams & A. Adams, 1851
Oithonella Mörch, 1857: synonym of Marsenina Gray, 1850
Oncidiopsis [sic]: synonym of Onchidiopsis Bergh, 1853
Pilidium Middendorff, 1851: synonym of Piliscus Lovén, 1859
Pseudoacculus [sic]: synonym of Pseudosacculus Hirase, 1928
Sacculus Hirase, 1927: synonym of Pseudosacculus Hirase, 1928
Velutella Gray, 1847: synonym of Velutina Fleming, 1820
References
Sources
Philippe Bouchet, Rocroi J.P., Hausdorf B., Kaim A., Kano Y., Nützel A., Parkhaev P., Schrödl M. & Strong E.E. (2017). Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia. 61(1-2): 1-526.