The Echinoid Directory

Cestobrissus

[?=Aguayoaster Sanchez Roig, 1952, type species Aguayoaster aguayoi, Sanchez Roig, 1952]

Diagnostic Features
  • Test elongate-ovate in outline with shallow anterior sulcus; flattened above and below with ambitus at about mid-height.
  • Apical disc structure unknown; positioned close to anterior margin.
  • Anterior ambulacrum weakly depressed from apex to peristome. Pore-pairs small and uniserial.
  • Petals narrow and parallel-sided and more or less straight; moderately sunken. The anterior petals angled at slightly more than 180 degrees and extending to the ambitus. Posterior petals slightly longer and not reaching ambitus; only weakly divergent.
  • Peristome anterior and D-shaped; downward-facing.
  • Plastron plating unknown.
  • Periproct on truncate posterior face.
  • According to Lambert (1912) a single marginal fasciole passing beneath the ambitus around the anterior, a few plates below the ends of the paired anterior petals and then beneath the periproct.
Distribution Eocene (Lutetian), France.
Name gender masculine
Type
Cestobrissus lorioli Lambert, 1912, p. 58, by original designation
Species Included Only the type species
Classification and/or Status

Spatangoida, Paleopneustina, ?Schizasteridae

Monotypic

Remarks

This poorly known taxon almost certainly has both peripetalous and lateroanal fascioles. It was originally described as having a marginal fasciole only, but this is probably because poor preservation has destroyed evidence of the posterior part of the peripetalous fasciole. It is very close to Aguayoaster in appearance and will probably turn out to be synonymous. In that genus, however, the fasciole passes around the base of the petals. A modern description of Cestobrissus is needed.

Lambert, J. 1912, Revision des echinides fossiles du Bordelais. Actes de la Societe Linneenne de Bordeaux 66, 45-120, pls 1-3.