Bothriocidaris

Bothriocidaris Temporal range:
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Bothriocidaroida
Family:	Bothriocidaridae
Genus:	Bothriocidaris Eichwald, 1860

Bothriocidaris is an extinct genus of echinoid from the Ordovician. It grew to 1.6 centimetres (0.63 in) in size and fed on plankton.

Bothriocidaris globulus. from the Encyclopædia Britannica, 1911. The short spines which were attached to the tubercles are not drawn.

References

• Dinosaurs to Dodos: An Encyclopedia of Extinct Animals by Don Lessem and Jan Sovak
• Parker, Steve. Dinosaurus: the complete guide to dinosaurs. Firefly Books Inc, 2003. Pg. 55

Kolata, Dennis; Strimple, Harrell; Levorson, Calvin (1977-01-01). "A New Species of Bothriocidaris (Echinoidea) from the Cincinnatian Maquoketa Group of Iowa". Proceedings of the Iowa Academy of Science. 84 (4): 146–149. ISSN 0085-2236.