The Echinoid Directory

Caenocentrotus H. L. Clark, 1912, p. 348

Diagnostic Features
  • Test circular in outline, low domal in profile.
  • Apical disc hemicyclic with ocular plates IV and V insert (periproct displaced to the left).
  • Ambulacral plating polygeminate with 4 pore-pairs to a plate; in oblique rows separated by secondary tubercles.
  • Pore-zones forming uniform adradial band not expanding adorally.
  • Interambulacral plates with single primary tubercle flanked by much smaller secondary tubercles. Remainder of plate with tertiary tubercles.
  • Spines less than half the length of the test.
  • Periproct decagonal.
  • Globiferous pedicellariae with tubular blade and single lateral tooth; no neck.
Distribution
Recent; East Pacific.
Name gender masculine
Type
Echinus gibbosus Agassiz & Desor, 1847, p. 367.
Species Included
  • Only the type species.
Classification and/or Status

Camarodonta; Echinoida; Echinometridae.

Monotypic.

Remarks
The apical disc is the most characteristic feature of this genus.