The Echinoid Directory

Caribbaster Kier, 1984, p. 67

Diagnostic Features
  • Test ovate with shallow anterior sulcus; inflated in profile.
  • Apical disc central; ethmolytic, with 2 gonopores. No gonopores in anterior genital plates.
  • Anterior ambulacrum in very shallow groove. Pore-pairs differentiated dorsally, with large peripodia.
  • Lateral paired ambulacra extending almost to ambitus; rather broad and weakly sunken. Posterior petals a little shorter. Pore-pairs in petals conjugate.
  • Periproct ovate and near top of vetically truncate posterior face.
  • Peristome ovate to kidney-shaped.
  • Labral plate a little longer than wide; extending to second ambulacral plate. Sternal plates long and well developed. Subsequent plating biserially alternate.
  • Aboral tuberculation fine, uniform and dense. Oral tubercles also dense and uniform.
  • Well-developed peripetalous fasciole crossing plate 5 in Iamb 1a; latero-anal fasciole present.
Distribution Eocene of the Caribbean.
Name gender masculine
Type
Prenaster loveni Cotteau, 1875, p. 34, by original designation.
Species Included
  • C. loveni (Cotteau, 1875); Middle to Late Eocene of St Bartholomew, Cuba and Jamaica.
  • C. dyscritus (Arnold & Clark, 1927); Eocene, Jamaica.
Classification and/or Status

Spatangoida, Paleopneustina, Schizasteridae.

Monophyletic?

Remarks

Kier (1984) gave a detailed description of the type material and good illustrations. It is close to Protenaster but differs from that genus in having two, not four gonopores and in having the combined marginal/peripetalous fasciole bounding the ends of the petals and crossing plates 1.b.5 and 4.a.5. It is very similar to Hypselaster, but that taxon has sunken petals with the posterior petals considerably shorter than the anterior petals.

Kier, P.M. 1984. Fossil spatangoid echinoids of Cuba. Smithsonian Contributions to Paleobiology 55, 1-336.