Bothriocidaris

Bothriocidaris; Temporal range: Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
	Bothriocidaris globulus from the Encyclopædia Britannica, 1911. The short spines which were attached to the tubercles are not drawn.
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.

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
1. ↑ 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.

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Bothriocidaris Temporal range: Ordovician PreꞒ Ꞓ O S D C P T J K Pg N

Bothriocidaris globulus from the Encyclopædia Britannica, 1911. The short spines which were attached to the tubercles are not drawn.
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	†Bothriocidaroida
Family:	†Bothriocidaridae
Genus:	†Bothriocidaris Eichwald, 1860