Eupatagidae, Taxa Only, Exact Match: 2 Treatments

Spatangoida		new species	Zachos, Louis G. & Molineux, Ann, 2003, Eocene echinoids of Texas, Journal of Paleontology 77, No. 3, pp. 491-508 : 504	504
Spatangoida		new species	Zachos, Louis G., 1968, A new echinoid from the Ocala Limestone, Quarterly Journal of the Florida Academy of Sciences 31, No. 3, pp. 161-164 : 161	161