The Echinoid Directory

Family Echinothuriidae Thompson, 1872, p. 327


 Echinothurioids with:

  • wide, geniculate, interambulacral plates
  • primary tubercles perforate and non-crenulate
  • ambulacra with two occluded elements in each pseudocompound plate
  • ambulacral plates continuing as a regular series of wedge-shaped elements on the peristomial membrane
  • spines ending in a hyaline hoof.
Upper Cretaceous to Recent; worldwide.
The distinctive hoof-like tips to oral spines is the most characteristic feature of this family.

Thomson, C. W. 1872. Notice of a new family of the Echinodermata. Proceedings of the Royal Society of Edinburgh 7 (1869-1872), 615-617.

Mortensen, T. 1935. A Monograph of the Echinoidea. II. Bothriocidaroida, Melonechinoida, Lepidocentroida, and Stirodonta. C. A. Reitzel, Copenhagen, 647 pp.