Wood turning snails
| Wood turning snails | ||||||||||||
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Wood turning snail ( Acteon tornatilis ) |
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| Acteonidae | ||||||||||||
| d'Orbigny , 1843 |
The wood turner snails ( Acteonidae ) are a family of rather small, exclusively marine snails in the order of the head shield snails (Cephalaspidea). The predatory snails found around the world have a solid outer shell.
features
Wood turning snails have a strong, quite solid outer shell with up to 8 whorls, into which, in contrast to most other hind gills , they can completely withdraw. A horny operculum is always present. The head shield forms a pair of anterolateral lobes and a pair of posterolateral cusps that can cover part of the shell. However, no parapodial flaps are formed. The posterior mantle lobe is inconspicuous. The coat is extended in the shell to form a spiral blind sack. There is a gill in the mantle cavity . The large penis of the hermaphrodite animals cannot be withdrawn. Chew plates are missing. The radula of the North Atlantic species has a large number of particularly small teeth. The nervous system is twisted.
The snails of the family Acteonidae feed as predators of polychaete .
The snails are hermaphrodites who mate with one another with their penises . Veliger larvae hatch from the eggs, feed on plankton and later metamorphose into juvenile snails .
Sample types
The Acteonidae include the wood turning snail ( Acteon tornatilis ), which feeds on the tube worms Lanice conchilega and Owenia fusiformis in the North Sea .
The Actinoidae also include the genus Trochactaeon, which is one of the typical chalk fossils of the Gosau Group and the Northern Limestone Alps . These occur locally in large numbers, sometimes also forming rock.
Systematics
The family includes 28 genera:
- Acteon Montfort, 1810
- Acteonina d'Orbigny, 1850 †
- Bathyacteon Valdés, 2008
- Bulimactaeon Cossmann, 1892 †
- Callostracon Repetto & Bianco, 2012
- Colostracon Hamlin, 1884 †
- Crenilabium Cossmann, 1889
- Hemiauricula Deshayes, 1853 †
- Inopinodon Bouchet, 1975
- Japonactaeon Is. Taki, 1956
- Maxacteon Rudman, 1971
- Mysouffa Marcus, 1974
- Neactaeonina Thiele, 1912
- Nucleopsis Conrad, 1865 †
- Obrussena Iredale, 1930
- Ongleya Finlay & Marwick, 1937 †
- Ovulactaeon Dall, 1889
- Pseudactaeon Thiele, 1925
- Punctacteon Kuroda & Habe, 1961
- Pupa Röding, 1798
- Rapturella Salvador & Cunha, 2016
- Rictaxis Dall, 1871
- Greatest Finlay & Marwick, 1937 †
- Tenuiactaeon Aldrich, 1921
- Tornatellaea Conrad, 1860
- Triploca Tate, 1893
- Volvaria Lamarck, 1801 †
- Wangacteon Stilwell, 1993 †
literature
- John D. Fish, Susan Fish: A Student's Guide to the Seashore . Cambridge University Press, Cambridge 2011. 540 pages. Opisthobranchs with an obvious external shell: Acteon tornatilis (Linnaeus) , p. 226.
- Philippe Bouchet & Jean-Pierre Rocroi: Part 2. Working classification of the Gastropoda . Malacologia, 47: 239-283, Ann Arbor 2005 ISSN 0076-2997
- 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 .
Web links
- MJ de Kluijver, SS Ingalsuo & RH de Bruyne: Family Acteonidae d'Orbigny, 1835. Mollusca of the North Sea, Marine Species Identification Portal
- Fischhaus Zepkow: Family Acteonidae - wood turning snails
Individual evidence
- ^ WoRMS (2018): Acteonidae d'Orbigny, 1843 . In: Bouchet, P .; Gofas, S .; Rosenberg, G. World Marine Mollusca database.