The Echinoid Directory

• Test ovate, with shallow frontal sulcus; low domal in profile with rounded ambitus.
• Apical disc ethmophract, with 3 gonopores (no gonopore in genital plate 2).
• Frontal ambulacrum sunken adapically, with small, differentiated pore-pairs.
• Other ambulacra forming short, straight, weakly sunken petals aborally; petals extending a little over half of the radial distance to the ambitus in plan view.
• Periproct at top of vertically truncate posterior face.
• Peristome facing obliquely forward, but visible in oral view.
• Labral plate longitudinally elongate; sternal plates triangular. No narrowing of plastron width towards rear of the episternals.
• No primary tubercles differentiated. Aboral tuberces small and uniform and set in groundmass of fine granules.
• Well-developed bilobed subanal fasciole crossing interambulacral plates at posterior of sternal plates 5.a.2 5.b.2.
• Peripetalous fasciole partially developed; absent from anterior part of test.

Late Eocene, Cuba.

Palmeraster palmeri Sanchez Roig, 1949, p. 269 [=Cyclaster drewryensis Cooke, 1942, p. 50], by original designation.

• Only the type species.

Spatangoida, Micrasterina, Micrasteridae, Cyclasterinae.

Subjective junior synonym of Cyclaster Cotteau, 1856.

Kier (1984) redescribed this species and considered it synonymous with Cooke's species Cyclaster drewryensis. There are no characters of significance to distinguish it from Cyclaster.

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