Euphrosinidae
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| Scientific name | ||||||||||||
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| Williams , 1852 |
Euphrosinidae is the name of a family of small predatory polychaeta (polychaeta) with numerous easily broken bristles that can be found in seas around the world and feed on various sessile animals .
features
The multi-bristle of the family Euphrosinidae have a short and broad, approximately elliptical body with less than 40 segments , which is covered with numerous brittle bristles . The prostomium is small and has an almost vertical edge with three antennae and 2 to 4 eyes, without palps, but with a three-lobed caruncle. The peristomium is reduced to lips around the mouth. The first segment surrounds the prostomium and has parapodies similar to those on the following segments, as well as tentacles - cirrus . The parapodies are two-branched. The notopodia have transverse ribs that almost meet in the middle and branched gills . The capillary-like or forked bristles contain calcium carbonate , which is why they are very brittle, get stuck in the flesh of possible attackers and thus trigger inflammation. Aciculae are located in the parapodia. The animals have both dorsal and ventral cirrus. At the pygidium there are two inflated cirrus.
The evertable, muscular pharynx on the abdomen side does not have a jaw. The intestinal canal is a straight tube and a throat membrane is missing. In most of the segments there are paired mixonephridia . The closed blood vessel system has no central heart.
Distribution, habitat and way of life
The Euphrosinidae are distributed in seas around the world. They live on different subsoils of sink, gravel, stones or rocks, on corals or sponges .
The Euphrosinidae feed as predators of sessile animals , such as sponges , bryozoans and corals whose tissue it with the hard-edged cuticle of eversible pharynx rasp. Some deep-sea euphrosine species eat chamberlings .
The life cycle of the Euphrosinidae is unknown.
Genera
The family Euphrosinidae is divided into 5 genera :
- Euphrosine Lamarck, 1818
- Palmyreuphrosysne Fauvel, 1913
- Euphrosinella Detinova, 1985
- Euphrosinopsis Kudenov, 1993
literature
- Stanley J. Edmonds: Fauna of Australia, Volume 4A. Polychaetes & Allies. The Southern Synthesis 4. Commonwealth of Australia, 2000. Class Polychaeta. Pp. 148-151, Family Euphrosinidae.
Web links
- MJ de Kluijver et al .: Euphrosinidae Williams, 1851. Macrobenthos of the North Sea - Polychaeta, Marine Species Identification Portal
Individual evidence
- ↑ Euphrosinidae Lamarck, 1818. WoRMS , 2018. Accessed June 14, 2018.