Diagnosis | Stem group atelostomates with:
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Range | Lower Cretaceous (Valanginian), North Africa. |
Remarks | Mintz, L. W. 1968. Echinoids of the Mesozoic families Collyritidae d'Orbigny, 1853 and Disasteridae Gras, 1848. Journal of Paleontology 42, 1272-1288. |