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The Echinoid Directory

Family unnamed (triplacidiids)

Diagnosis ?Camarodonta with:
  • apical disc relatively small; monocyclic. Periproct subcircular with smooth edges (periproctal plates not indenting apical ring);
  • ambulacra with echinid style compounding;
  • primary tubercles in ambulacral and interambulacral zones similar; imperforate and obviously crenulate;
  • peristome much larger than apical disc; no phyllodes and shallow buccal notches;
  • Lantern unknown.
Range Cretaceous (Campanian) to Recent, worldwide.
Classification and/or Status Echinacea, Camarodonta