The Echinoid Directory

Evechinus Verrill, 1871, p. 583

Diagnostic Features
  • Test circular in outline.
  • Apical disc hemicyclic; posterior oculars exsert; periproct relatively small.
  • Ambulacra trigeminate, with complex compound plates. Every second or third compound plate larger than the others and bearing a primary tubercle.
  • Pore-pairs widely spaced so that there are three incipient columns of pore-pairs in each half ambulacrum.
  • Interambulacra with primary tubercle and flanking secondary tubercles that are almost as large; granulation poorly developed.
Pliocene, Australia, Pleistocene to Recent of New Zealand and the Kermadec Islands.
Name gender masculine
 Echinus chloroticus Valenciennes, 1846, by original designation.
Species Included
  • E. chloroticus (Valenciennes, 1846); Pleistocene to Recent, New Zealand; Recent, Kermadec Islands.
  • E. palatus Philip 1969; Pliocene (Cheltenhamian); Australia.
Classification and/or Status

Camarodonta; Echinoida; Echinometridae.

Presumed monophyletic.


Distinguished from the rather similar Selenechinus by having more strongly developed secondary tubercles aborally and much less granulation. Also differs in having pore-pairs of the inner series forming a clearly separated column. Differs from Parechinus in having a primary tubercle to every second or third ambulacral plate.

A fossil taxon from Australia ascribed to this genus by Philip (1969) has the triserial pattern of pore-pairs only really expressed below the ambitus.

Philip, G. M. 1969. The Tertiary echinoids of south-eastern Australia IV. Camarodonta (2). Proceedings of the Royal Society of Victoria 82, 233-275, pls 3-16.

Verrill, A. H. 1871. Notes on Radiata. Transactions of the Connecticut Academy 1, p. 583.