Asterias rubens, div. larvae Helgoland 2016

Video in TIB AV-Portal: Asterias rubens, div. larvae Helgoland 2016

Formal Metadata

Title
Asterias rubens, div. larvae Helgoland 2016
Title of Series
Author
License
CC Attribution 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
Identifiers
Publisher
Release Date
2021
Language
Silent film
Producer
Larink, Otto
Production Year
2016
Production Place
Helgoland

Content Metadata

Subject Area
Abstract
Asterias rubens (Echinodermata, Asteroida, Forcipulatida, Asteridae), bipinnaria and brachiolaria larva, length 730 µm – 1.4 mm, Helgoland 03.2016. 1:32 min. The bipinnaria develops lateral lobes and ciliary bands which become more and more complex. The mouth is frontally covered by a medial lobe. Aside the gut coelomic pouches are formed and their differentiation can be observed in the bipinnaria in probably the best way among all coelomates. The brachiolaria (anchor larva) develops tentacles with ciliary bands which separate from the two loops of the early bipinnaria. At the frontal region three brachiolar arms with papillae develop, and between them a sucker. These structures play a role in settleing for metamorphosis. Video can be used for teaching.
Keywords Echinodermata Asteroida Forcipulatida Asteridae Asterias rubens bipinnaria larva Helgoland 2016
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