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Dendrochirotida

From Wikipedia, the free encyclopedia

Dendrochirotida
Pseudocolochirus violaceus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Class: Holothuroidea
Subclass: Actinopoda
Order: Dendrochirotida
Families

(See Text)

Dendrochirotida are an order of sea cucumbers. Members of this order have branched tentacles and are suspension feeders. Examples include Thyonella and Cucumaria.

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  • Sea Cucumber (Holothuroidea)

Transcription

Characteristics

Holothurians in this order are characterised by ten to thirty much branched tentacles which are sometimes digitate. They also have ring structures composed of ten calcareous plates circling the pharynx. They have both retractor and introvert muscles which means they can retract the tentacles into the mouth when not feeding.[1] The body wall is either firm with large ossicles or of a soft consistency with few ossicles. In some genera the animals attach themselves to hard surfaces but in others they burrow into soft sediments. Prey is captured by the sticky tentacles and transferred to the mouth. The larvae are lecithotrophic, not feeding on plankton but surviving only on materials already present in the eggs until they settle and become juveniles.[2]

Taxonomy

Order: Dendrochirotida

References

  1. ^ An illustrated key to the sea cucumbers of the South Atlantic Bight Retrieved 2012-02-12.
  2. ^ Marine Species Identification Portal


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This page was last edited on 26 October 2023, at 18:05
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