Hemicidaridae is a family of extinct sea urchins characterized by large, massive, club-shaped spines.

Temporal range: Jurassic- Cretaceous
Hemicidaridae - Asterocidaris species.JPG
Fossil of Asterocidaris species
Scientific classification e
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Infraclass: Carinacea
Family: Hemicidaridae
Wright, 1857

These epifaunal grazer-deposit feeders lived in Jurassic and Cretaceous ages (from 189.6 to 112.6 Ma).[1]


List of genera and subfamilies:[2][3]

Asterocidaris Cotteau, 1859
Gymnocidaris L. Agassiz, 1838
Hemicidaris L. Agassiz, 1838
Cidaropsis Cotteau, 1863
Pseudocidaris Pomel, 1883
Gymnocidaris L. Agassiz, 1838
Hemicidaris (Sphaerotiaris) Lambert & Thiéry, 1914


Fossils of species within this genus have been found in the Jurassic and Cretaceous sediments in Europe, Africa, North America and China.[1]


  1. ^ a b "Fossilworks: Gateway to the Paleobiology Database". fossilworks.org. Retrieved 2015-05-10.
  2. ^ "WoRMS - World Register of Marine Species - Hemicidaridae Wright, 1857 †". marinespecies.org. Retrieved 2015-05-10.
  3. ^ "BioLib - Hemicidaridae". biolib.cz. Retrieved 2015-05-10.