The Echinoid Directory

• Test subspherical.
• Apical disc small, plating unknown.
• Ambulacra more or less straight; plating trigeminate throughout with pore-pairs set oblique so as to form a relatively wide pore-zone. Plate compounding style unknown but probably with just one of the three elements reaching the perradial suture.
• Primary tubercle on each compound plate, but every third tubercle about twice the diameter of the others. Usually with a second small tubercle on each plate plus scattered granules.
• Interambulacral plates very wide; with a small central primary tubercle and one or more adradial and interradial secondary tubercles that are almost as large.
• Primary tubercles on interambulacral plates separated in vertical series. Tubercles perforate and non-crenulate; areole not sunken. Remainder of plate covered in rather dense irregular granules.
• Peristome small and with deep, sharp notches.
• Perignathic girdle, lantern and spines unknown.

Middle Jurassic (Bathonian) to Late Jurassic (Oxfordian), France.

Pedina charmassei Cotteau, 1884, by original designation.

• Lambert & Thiery (1910) included two other species, Pedina grossouvrei Cotteau and P. gigas Agassiz, from the Bathonian.

Pedinoida, Pedinidae.

Subjective junior synonym of Pedina Agassiz, 1838.

The distinction of this species from Pedina sublaevis is largely one of size, although Lambert & Thiery erected this genus on the basis that the ambulacral plating was more regularly trigeminate (i.e. primary tubercles were present on most ambulacral plates). Although this is true, there is still a distinct heterogeneity in the size of ambulacral tubercles and therefore this genus is treated as a synonym of Pedina.

Lambert, J. & Thiéry, P. 1909-1925. Essai de Nomenclature Raisonnée des Echinides. L. Ferrière, Chaumont.