Late Triassic (Norian) to Recent; widespread.
|Species Included||Only the family Pedinidae is included. However, there are also two other genera that possibly also belong here and which are quite different from the Pedinida: Orthocidaris Cotteau, 1862, and Zardinechinus Kier, 1977.
|Classification and/or Status||Euechinoidea, Acroechinoidea|
|Remarks||The following genus remains too poorly known to be placed with certainty into the following key, but probably belongs here:
Engelia Tornquist, 1908
Mortensen, T. 1939. New Echinoida (Aulodonta). Preliminary Notice. Videnskabelige Meddelelser fra Danks naturhistorisk Forening i Kobenhavn 103, 547-550.
Mortensen, T. 1940. A Monograph of the Echinoidea. III, 1. Aulodonta, with Additions to Vol. II (Lepidocentroida and Stirodonta). C. A. Reitzel, Copenhagen, 370 pp.