Burdock holothuria

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Burdock holothuria
Burdock holothuria (Leptosynapta inhaerens). Brehm's Thierleben, 1893

Burdock holothuria ( Leptosynapta inhaerens ). Brehm's Thierleben , 1893

Systematics
Trunk : Echinoderms (Echinodermata)
Class : Sea cucumber (Holothuroidea)
Order : Apodida
Family : Synaptidae
Genre : Leptosynapta
Type : Burdock holothuria
Scientific name
Leptosynapta inhaerens
( OV Müller , 1776)

The burdock holothuria ( Leptosynapta inhaerens ) is a species of sea cucumber of the family of worm sea cucumbers (Synaptidae) widespread in the northeastern part of the Atlantic Ocean . Synonyms for burdock holothuria are Holothuria inhaerens , Synapta inhaerens and Synapta bifaria .

Appearance and anatomy

The Klettenholothurie has a worm-shaped, long, soft, pale pink colored and quite transparent, up to 30 cm long body with twelve fingered mouth feelers (tentacles) and without suction feet. There are 5 to 7 pairs of lateral fingers on each tentacle and another, unpaired finger at the tip. On the inside of the little fingers sit 2 longitudinal rows of small, round sensory organs. The water vascular system is limited to the supplies the sensors mouth as with other synaptidae on the mouth ring. The calcareous elements in the skin are designed as anchors and as anchor plates with 6, sometimes 7 sawn holes and without handles, through which the holothuria can "attach" itself. The limestone ring consists of 12 radially perforated parts.

distribution

The Klettenholothurie is widespread in the northeastern part of the Atlantic Ocean and in the North Sea from the coast of Norway , along all the western coasts of the British Isles to the Breton coast. It can be found at depths of up to 50 m, and after a single discovery in the Bay of Biscay, also at a depth of 173 m.

Habitat and way of life

The burdock holothuria digs through pure or muddy sand and in this way builds caves from which it sticks out its mouth feelers or a part of the body in order to collect food particles from detritus from the substrate surface.

Development cycle

In contrast to most holothuria, the burdock holothuria is a hermaphrodite . The gametes are released into the open sea water, where fertilization takes place. Free-swimming, plankton-eating Doliolaria larvae develop from the zygotes and later metamorphose into crawling sea cucumbers .

literature

  • PJ Hayward, JS Ryland: Handbook of the Marine Fauna of North-West Europe. Oxford University Press, Oxford 2017. p. 686.
  • Bernard E. Picton: A Field Guide to the Shallow-water Echinoderms of the British Isles. Marine Conservation Society. Immel Publishing Ltd., London 1993. Labidoplax inhaerens (Montagu, 1815), p. 82.
  • JD Fish, S. Fish: A Student's Guide to the Seashore. Cambridge University Press, 2011. Labidoplax bergensis (Montagu), pp. 425f.
  • Alfred Brehm : Brehm's Thierleben . General customer of the animal kingdom. Great edition . Volume 10. Bibliographical Institute, Leipzig / Vienna 1893. Klettenholothurie . Pp. 509-412 .

Web links

Commons : Klettenholothurie ( Leptosynapta inhaerens )  - Collection of images, videos and audio files