Diagnosis | Stem group Camarodonta with:
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Range | Lower Cretaceous - Eocene, Europe, Middle East, North Africa. |
Remarks | Differing from Emiratiidae in having a smooth periproctal opening, not an angular opening, and its compound ambulacral plates have the lowest of the three elements the largest, as in echinid-style plate compounding. Temnopleuridae differ in having a hemicyclic or dicyclic apical disc and imperforate tubercles. |