The Echinoid Directory

Order Echinoida Troschal, 1872

[=Echinina Mortensen, 1942]


 Regular euechinoids with:

  • imperforate, non-crenulate tubercles;
  • peristome with shallow buccal notches;
  • lantern with keeled teeth and epiphyses fused above the foramen magnum;
  • perignathic girdle with auricles fused perradially;
  • ambulacral plates compound in echinid style (lowest element the largest).
?Maastrichtian (Late Cretaceous) to Recent; worldwide.

The following taxon probably belongs here but is currently too poorly known to be placed into any family with certainty:

Gajechinus Lambert & Thiery, 1914