Notocrinidae
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| Notocrinidae | |
|---|---|
| File:Notocrinus virilis (USNM 1126534) 002.jpeg | |
| Notocrinus virilis | |
| Scientific classification Edit this classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Crinoidea |
| Order: | Comatulida |
| Superfamily: | Notocrinoidea |
| Family: | Notocrinidae Mortensen, 1918[1] |
| Genus | |
|
See text | |
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Notocrinidae is a family of crinoids. It includes one extant genus, Notocrinus,[1] which contains two species, both endemic to the seas around Antarctica.[2] and Zelandimetra, a fossil taxon from the Late Oligocene found in New Zealand.[3]
Description
[edit | edit source]Members of this family have five arms which subdivide near the base giving them ten arms in total. The arms can reach 100 mm (4 in) in length, and there are thirty to sixty or more cirri. The gonads are located on the arms, and the embryos are brooded in cavities in the arms. The aboral surface (underside) of the disc has five deep radial pits arranged in a star-shape.[2]
Genera
[edit | edit source]- Notocrinus Mortensen, 1917
- Zelandimetra Eagle, 2008
References
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