Onchidorididae
| Onchidorididae | ||||||||||||
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Acanthodoris lutea laying eggs |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Onchidorididae | ||||||||||||
| Gray , 1854 |
The Onchidorididae are a family of star snails in the suborder of the nudibranchs . These are mostly medium-sized, exclusively marine, caseless snail species that mainly eat sponges or bryophytes .
features
The Onchidorididae have a flat body with an oval outline. The back is soft and covered with many small bumps or warts, the tubercles. The two feelers on the head, the rhinophores , are laminated. Often a semicircular mouth sail is present, for example in the genus Onchidoris . The wide ring of small gills arranged around the anus on the back cannot be withdrawn, but this is sometimes possible with individual gills.
The snails have a narrow radula with hook-shaped first and sometimes second posterior teeth. Jaws are missing. A goiter is located dorsally on the pharynx , with the help of which food can be sucked in.
The Onchidorididae mainly eat sponges and moss animals , whose meat is rasped with the radula.
Like other star snails, the Onchidorididae are hermaphrodites and mate with each other. They lay their eggs in mostly white egg strings from which numerous Veliger larvae hatch, feed on plankton and, after a long pelagic phase, metamorphose into small star snails .
The Onchidorididae include the soft-waxy star snail ( Acanthodoris pilosa ), the red star snail ( Adalaria proxima ), the brown-spotted star snail ( Onchidoris bilamellata ) and the rough star snail ( Onchidoris muricata ).
Systematics
According to Bouchet and Rocroi (2005), the family Onchidorididae is one of three families in the superfamily Onchidoridoidea . Seven genera belong to the family:
- Acanthodoris Gray, 1850
- Adalaria Bergh , 1879
- Calycidoris Abraham, 1876
- Diaphorodoris Iredale and O'Donoghue, 1923
- Loy Martynov, 1994 (only kind Loy meyeni Martynov, 1994 )
- Onchidoris de Blainville , 1816
- Onchimira Martynov, Korshunova, N. Sanamyan & K. Sanamyan, 2009 (only species Onchimira cavifera Martynov, Korshunova, N. Sanamyan & K. Sanamyan, 2009 )
Lamellidoris Adler & Hancock, 1855 is synonymous with Onchidoris Blainville, 1816 .
These genera are now included in the Akiodorididae family :
- Akiodoris Bergh , 1879
- Doridunculus G. O. Sars, 1878
literature
- Luise Schmekel, Adolf Portmann: Opisthobranchia of the Mediterranean: Nudibranchia and Saccoglossa . Springer-Verlag, Berlin Heidelberg New York 1982. Onchidorididae Alder and Hancock, 1845 : p. 118.
- John D. Fish, Susan Fish: A Student's Guide to the Seashore . Cambridge University Press, Cambridge 2011. 540 pages. Onchidorididae , p. 246.
- Philippe Bouchet & Jean-Pierre Rocroi: Part 2. Working classification of the Gastropoda . Malacologia, 47: 239-283, Ann Arbor 2005 ISSN 0076-2997
Web links
Individual evidence
- ^ World Register of Marine Species , Onchidorididae Rafinesque, 1815
- ↑ A. Martynov, T. Korshunova, N. Sanamyan, K. Sanamyan (2009): Description of the first cryptobranch onchidoridid Onchimira cavifera gen. Et sp. nov., and of three new species of the genera Adalaria Bergh, 1879 and Onchidoris Blainville, 1816 (Nudibranchia: Onchidorididae) from Kamchatka waters (PDF; 13 kB) . Zootaxa 2159, pp. 1-43.
- ↑ SV Millen, A. Martynov (2005): Redescriptions of the nudibranch genera Akiodoris Bergh, 1879 and Armodoris Minichev, 1972 (suborder Doridacea) with a new species of Akiodoris and a new family Akiodorididae (PDF; 3.6 MB) . Proceedings of the California Academy of Sciences, (4) 56 (1-17), pp. 1-22.