The Paleontology of North America

Echinoids from North America

See images from the:

Epiaster whitei From the Cretaceous in Texas © 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum	Astrodaspis coalingensis From the Tertiary in California © 2004 UCMP	Clypeaster rosaceus From the Quaternary in Florida © 2003 Roger Portell, Florida Museum of Natural History
Periarchus lyelli From the Tertiary in Mississippi © 2005 George E. Phillips, Mississippi Museum of Natural Science