The Echinoid Directory

• Test subglobular with rounded ambitus.
• Apical disc not known.
• Ambulacra more or less straight; plating trigeminate throughout with pore-pairs uniserial. Plate compounding style with all three elements reaching the perradius but with the lowest of the three distinctly larger.
• Primary tubercle on each compound plate situated close to the pore zone. Perradial zone broad and covered in fine granules.
• Interambulacral plates a little wider than tall; with a central primary tubercle the remainder of the plate with small scattered granules.
• Primary tubercles perforate and crenulate.
• No sutural pitting.
• Peristome small, weakly depressed, with deep and sharp buccal notches.
• Perignathic girdle, lantern and spines unknown.

Middle Eocene, France

Hebertia parisiensis Michelin, 1859, p. 147, by original designation.

• Only the type species.

Euechinoidea, Camarodonta, Temnopleuroida, Glyphocyphidae

Subjective synonym of  Echinopsis Agassiz, 1840.

One specimen labelled as Hebertia parisiensis from the Eocene of the Paris basin in the collections of the Museum National d'Histoire Naturelle, Paris, has been examined.  A second specimen, figured by Cotteau (1893, pl. 341, figs 1-9) is in the University of Lyon and is also figured here.

Cotteau, G. 1893. Paleontologie francaise. Terrains Tertiares. II Eocene Echinoidea. V. Masson, Paris.