Velutinidae

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Velutinidae
Coriocella nigra

Coriocella nigra

Systematics
Superordinate : Caenogastropoda
Order : Sorbeoconcha
Subordination : Hypsogastropoda
Partial order : Littorinimorpha
Superfamily : Velutinoidea
Family : Velutinidae
Scientific name
Velutinidae
JE Gray , 1840
Onchidiopsis glacialis , dorsal view
Lamellaria latens , dorsal view
Lamellaria latens , ventral view

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

Subfamily Lamellariinae AD d'Orbigny, 1841

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

  1. ^ 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 .

Web links

Commons : Velutinidae  - collection of images, videos and audio files