Red-violet thread snail
| Red-violet thread snail | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Red-violet thread snail ( Edmundsella pedata ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Edmundsella pedata | ||||||||||||
| Montagu , 1815 |
The red-violet thread snail or violet coryphella ( Edmundsella pedata , common synonyms : Flabellina pedata , Coryphella pedata , Doris pedata Montagu, 1815, Eolis landsburgi Alder & Hancock, 1846) is a marine nudibranch. It is one of the 70 species of thread snails that are also native to the Mediterranean. It belongs to the subordination of the nudibranchia (Nudibranchia).
description
The animal's slender body is reddish-purple. It has numerous dorsal appendages with white tips arranged in pairs. The midgut gland can be seen in the translucent appendages red-orange. (All) thread snails also store poisonous nettle capsules in the appendages, which they ingest when they eat hydroid polyps . On the head there are rhinophores , which have white tips like the dorsal appendages. The red-violet thread snail also has two head feelers and mouth tentacles that are grooved on the surface . Individuals of this species can grow up to 4 cm. Like all thread snails, the species is bisexual. The eggs are laid in strings. The larvae drift through the water as plankton and still have a housing that is lost as soon as the animals live on the ground. Edmundsella pedata is often confused with the species Flabellina affinis by divers . However, this has longer antennae and long and thin dorsal appendages.
Occurrence
The very conspicuous marine nudibranch is found in the Mediterranean Sea , the Atlantic Ocean , the English Channel and the North Sea (around the island of Helgoland ). It lives on various algae and polyp sticks on rocky reefs and in tide pools in the waters mentioned above.
nutrition
The red-violet Fadenschnecke feeds as a food specialist of polyps fewer types of colony forming hydroids . The adult snails prefer Eudendrium ramosum from the order of the Anthoathecata , younger specimens graze on smaller polyps.
literature
- Matthias Bergbauer, Bernd Humberg: What lives in the Mediterranean? New, expanded and revised edition. Kosmos, Stuttgart 2017. Violette Coryphella , Edmundsella pedata , p. 174.
- Rupert Riedl: Fauna and flora of the Mediterranean . 836 pp., Seifert-Verlag, 2011, ISBN 978-3-902406-60-6
- Louise Schmekel & Adolf Portmann: Opisthobranchia of the Mediterranean: Nudibranchia and Sacoglossa (Fauna e flora del Golfo di Napoli, 40). 410 pp., Berlin, Springer Verlag 1982 ISBN 3-540-11354-1
Web links
- Red-violet thread snail, Coryphella pedata (Montagu, 1815). Underwater world Baltic Sea
- MJ de Kluijver, SS Ingalsuo & RH de Bruyne: Coryphella pedata (Montagu, 1815). Marine Species Identification Portal
- William Rudman: Flabellina pedata (Montagu, 1815) ( Memento June 15, 2010 in the Internet Archive ). The Sea Slug Forum
- BE Picton and CC Morrow, 2005: Edmundsella pedata (Montagu, 1815). Encyclopedia of Marine Life of Britain and Ireland
Individual evidence
- ↑ Edmund Ella pedata (Montagu, 1816). WoRMS , accessed June 8, 2018.