Pedinoida
Sign in to savePedinoida is an order of sea urchins, containing the family Pedinidae with a single living genus, Caenopedina. The group was much more diverse during the Mesozoic, and represents the oldest surviving order of euechinoid sea urchins.
Wikidata facts
- Instance of
- taxon
- Parent taxon
- Diadematacea
- Image
- Diademopsis crinifera.JPG
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- taxon name
- Pedinoida
- taxon rank
- order
- topic's main category
- Category:Pedinoida
- Commons category
- Pedinoida
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Encyclopedic overview
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Pedinoida is an order of sea urchins, containing the family Pedinidae with a single living genus, Caenopedina. The group was much more diverse during the Mesozoic, and represents the oldest surviving order of euechinoid sea urchins.
They are distinguished from other sea urchins by the presence of a rigid test with tessellated plates. While their primary spines are solid, the smaller ones may be hollow, further distinguishing them from the closely related orders Diadematoida and Echinothurioida, which possess only hollow spines.
Excerpted from Wikipedia’s “Pedinoida” article, available under the CC BY-SA 4.0 licence.