Velutinidae
Velutinidae | ||||||||||||
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Scientific name | ||||||||||||
Velutinidae | ||||||||||||
JE Gray , 1840 |
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Onchidiopsis_glacialis.png/220px-Onchidiopsis_glacialis.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Lamellaria_latens.png/220px-Lamellaria_latens.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Lamellaria_latens_2.png/220px-Lamellaria_latens_2.png)
The Velutinidae are a family of exclusively marine snails found almost worldwide in warm, temperate and cold seas. They feed on sea squirts .
features
The mostly small, ear-shaped housings are twisted to the right and have a short, low thread. The mostly broad, egg-shaped, large mouth takes up most of the base. The snails have a blunted head and thread-like antennae, behind the base of which the eyes are raised. The radula of the volutinids has a row of central teeth and three rows of posterior teeth. The foot has a protruding corner on the front edge on each side.
The case is more or less completely covered by the very thick jacket hem. In some species (e.g. Velutina velutina ) the snail can retreat completely into the house, in others (e.g. Marsenina stearnsii ) the house can at least be shown by the snail by widening a slit on the back, while in further (e.g. some species of lamellaria ) the mantle over the house is fused.
The snails are small to medium in size. As far as the various species are known, the development takes place via a plankton-eating Veliger larva.
Way of life
The Velutinidae live in the tidal range up to a depth of several hundred meters. The main distribution is in the shallow water area. They live together with sea squirts , on which they mainly feed and in whose empty shells they lay their egg capsules.
Systematics
The family Velutinidae is divided into two subfamilies after the revision of the taxonomy of snails by Bouchet and Rocroi (2005):
- Subfamily Velutininae JE Gray, 1840 - Synonyms: Marseniidae Leach in Gray, 1847; Marsenininae Odhner, 1913; Capulacmaeinae Golikov & Gulbin, 1990; Onchidiopsinae Golikov & Gulbin, 1990 (na); Marseniopsidae Badel, 1993 (na)
- Subfamily Lamellariinae AD d'Orbigny, 1841 - Synonyms: Coriocellidae Troschel, 1848; Sacculidae Thiele, 1929 (inv.); Pseudosacculidae Kuroda, 1933
Representative
Here are some representatives of the Velutinidae family within the 2005 classification:
Subfamily Velutininae
- Genus Capulacmaea
- Capulacmaea commodum Middendorff, 1851
- Genus Cartilagovelutina Golikov & Gulbin, 1990
- Cartilagovelutina beringensis (Derjugin, 1950)
- Cartilagovelutina chondrina (Bartsch in Derjugin, 1950)
- Cartilagovelutina cristata (Derjugin, 1950)
- Genus Marsenina
- Marsenina ampla AE Verrill, 1880
- Marsenina glabra (Couthouy, 1838)
- Marsenina globosa LM Perry, 1939
- Marsenina rhombica (Dall, 1871)
- Marsenina stearnsii (Dall, 1871)
- Genus Onchidiopsis
- Onchidiopsis glacialis M. Sars, 1851
- Onchidiopsis latissima Odhner, 1913
- Onchidiopsis spitzbergensis Jensen, in Thorson, 1944
- Genus Piliscus
- Piliscus commodus Middendorff, 1851
- Piliscus rostratus (Golikov & Gulbin, 1990)
- Piliscus undulatus (Golikov & Gulbin, 1990)
- Genus Pseudotorellia
- Pseudotorellia fragilis Warén, 1989
- Genus Velutina J. Fleming, 1820
- Velutina plicatilis (OV Müller, 1776)
- Velutina schneideri Friele, 1886
- Velutina velutina (OV Müller, 1776)
Subfamily Lamellariinae AD d'Orbigny, 1841
- Genus Calyptoconcha
- Calyptoconcha pellucida AE Verrill, 1880
- Genus Coriocella Blainville, 1824
- Coriocella hibyae Wellens, 1991
- Genus Lamellaria G. Montagu, 1815
- Genus Marseniella
- Marseniella borealis Bergh, 1886
- Genus Marseniopsis
- Genus Mysticoncha Allan, 1936
literature
- Philippe Bouchet, Jean-Pierre Rocroi: Part 2. Working classification of the Gastropoda . Malacologia, 47: 239-283, Ann Arbor 2005, ISSN 0076-2997 .
- Victor Millard: Classification of the Mollusca. A Classification of World Wide Mollusca . Rhine Road, South Africa 1997, ISBN 0-620-21261-6 .
- Winston Ponder & David Lindberg, Towards a phylogeny of gastropod molluscs; an analysis using morphological characters . Zoological Journal of the Linnean Society, 119: 83-265, London 1997, ISSN 0024-4082 .
- Frank Riedel: Origin and evolution of the "higher" Caenogastropoda . Berliner Geoscientific Abhandlungen, Series E, Volume 32, Berlin 2000, 240 pages, ISBN 3-89582-077-6 .
- Heinrich Adolf Meyer, Karl August Möbius: Fauna of the Kiel Bay . Published by Wilhelm Engelmann, Leipzig 1872. S. 40ff .: Velutinidae.
Individual evidence
- ^ Philippe Bouchet, Jean-Pierre Rocroi, J. Frýda, B. Hausdorf, Winston Ponder, Á. Valdés, A. Warén (2005): Classification and nomenclator of gastropod families . Malacologia: International Journal of Malacology (Hackenheim, Germany: ConchBooks) 47 (1-2): 1-397. ISBN 3925919724 . ISSN 0076-2997 .