Heart_urchin

Spatangoida

Spatangoida

Order of sea urchins

The heart urchins or Spatangoida are an order of sea urchins.

Quick Facts Scientific classification, Suborders ...

Their body is a somewhat elongated oval in form, and is distinguished by the mouth being placed towards one end of the animal, and the anus towards the other. As a result, heart urchins, unlike most other sea urchins, are bilaterally symmetrical, and have a distinct anterior surface. The presence and position of the mouth and anus typically give members of this group the distinct "heart" shape from which they get their name.

Heart urchins have no feeding lantern, and often have petaloids sunk into grooves. They are a relatively diverse order, with a number of varying species.

Taxonomy

According to World Register of Marine Species :

See also

References

  • Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 981. ISBN 0-03-056747-5.
  • National History Museum. "Spatangoida". Retrieved 19 Dec 2009.


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This article uses material from the Wikipedia article Heart_urchin, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.