The Echinoid Directory

Family Cardiasteridae Lambert, 1917, p. 2

Diagnosis

 Stem group holasteroids with:

  • metasternous plastron (labrum followed by at least two uniserially arranged plates);
  • marginal fasciole around posterior part of test;
  • frontal groove generally well developed.
Range
Late Cretaceous (Turonian to Maastrichtian) ?Palaeocene; North America, Europe, North Africa, Middle East.