The Echinoid Directory

Suborder Urechinina Duncan, 1889, p. 211


 Holasteroid echinoids with:

  • orthosternous plastron;
  • subanal fasciole generally present (secondarily absent in adults of some taxa). Adoral part crosses Ia plates 2a/3b.
Maastrichtian to Recent; worldwide.
Remarks The genus Ganbirretia Gauthier, 1903 may belong here but is currently too poorly known to place with certainty.