Biology:Hemicidaridae
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Short description: Extinct family of sea urchins
| Hemicidaridae | |
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| Fossil of Asterocidaris species | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Infraclass: | Carinacea |
| Family: | †Hemicidaridae Wright, 1857 |
Hemicidaridae is a family of extinct sea urchins characterized by large, massive, club-shaped spines.
These epifaunal grazer-deposit feeders lived in Jurassic and Cretaceous ages (from 189.6 to 112.6 Ma).[1]
Taxonomy
List of genera and subfamilies:[2][3]
- Subfamily Hemicidarinae Wright, 1857 †
- Asterocidaris Cotteau, 1859 †
- Gymnocidaris L. Agassiz, 1838 †
- Hemicidaris L. Agassiz, 1838 †
- Subfamily Pseudocidarinae Smith & Wright, 1993 †
- Cidaropsis Cotteau, 1863 †
- Pseudocidaris Pomel, 1883 †
- Gymnocidaris L. Agassiz, 1838 †
- Hemicidaris (Sphaerotiaris) Lambert & Thiéry, 1914 †
Distribution
Fossils of species within this genus have been found in the Jurassic and Cretaceous sediments in Europe, Africa, North America and China.[1]
References
- ↑ 1.0 1.1 "Fossilworks: Gateway to the Paleobiology Database". fossilworks.org. http://www.fossilworks.org/cgi-bin/bridge.pl?action=home. Retrieved 2015-05-10.
- ↑ "WoRMS - World Register of Marine Species - Hemicidaridae Wright, 1857 †". marinespecies.org. http://marinespecies.org/aphia.php/aphia.php?p=taxdetails&id=510759. Retrieved 2015-05-10.
- ↑ "BioLib - Hemicidaridae". biolib.cz. https://www.biolib.cz/en/taxon/id295885/. Retrieved 2015-05-10.
Wikidata ☰ Q15535510 entry
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