The Echinoid Directory

Family Fibulariidae Duncan, 1889, p. 144

Diagnosis

 Laganiformes with:

  • no internal buttressing of the test;
  • periproct close to peristome and bounded by first and second paired post-basicoronal interambulacral plates;
  • basicoronal circlet small and unspecialized;
  • food grooves generally absent (may be a weakly defined groove in the anterior ambulacrum).
Range
 Eocene to Recent; worldwide.