The Echinoid Directory

• Test ovate with faint anterior sulcus; weakly convex lower surface, low-domed upper surface.
• Apical disc ethmolytic with four gonopores; anterior of centre.
• Anterior ambulacrum narrow and faintly depressed adapically.
• Paired ambulacra petaloid aborally and flush. Petals not strongly developed, weakly bowed and converging distally. Pore-pairs in anterior column of anterior petals rudimentary adapically. Perradial zone narrow.
• Peristome large and D-shaped.
• Labrum elongate and wedge-shaped, extending to third ambulacral plate. Plastron fully tuberculate. Episternal plates tapering only slightly to the posterior.
• Periproct posterior.
• Peripetalous fasciole passes through the distal part of the paired petals defining an inner and outer part.
• Subanal fasciole present; bilobed.
• No larger tubercles aborally except adjacent to the frontal ambulacrum.

Eocene (Lutetian) of Blaye, France; Eocene (undifferentiated), Iraq.

Temnaster grossouvrei, Lambert, 1912, p. 63, by original designation.

• Only the type species.

Spatangoida, Micrasterina, Loveniidae.

Monotypic, subjective junior synonym of Gualtieria Desor, 1847.

Supposedly differs from Gualtieria in having the peripetalous fasciole passing through the petals close to their end rather than at mid-length, and in lacking the strong tubercles on the basicoronal interambulacral plates surrounding the mouth. The distinction between the two seems very slight.