The Echinoid Directory

• Test depressed with rather deeply sunken peristome.
• Apical disc small; plates firmly bound to corona. Plating dicyclic but with posterior oculars only just insert.
• Ambulacra more or less straight; plating trigeminate throughout in offset triads, with lowest pore-pair interior to other two pore-pairs; formign a moderately wide adradial band. Plate compounding style echinoid.
• Primary tubercle on each compound plate; forming a vertical series close to the pore-pairs and united by a low ridge. Smaller secondary tubercle present in the rather broad perradial zone.
• Interambulacral plates wide; with a small central primary tubercle plus flanking tubercles of similar size.
• Primary tubercles imperforate and noncrenulate areole with distinct pits and radial ornament of bars.
• No large pits, but epistromal ornament gives the plates a strongly sculpted appearance and small pits are present especially around the primary tubercle.
• Interradius rather sparsely tuberculate and a little sunken especially adapically.
• Peristome small and sunken with obvious buccal notches; no adoral phyllodes.
• Perignathic girdle, lantern and spines unknown.

Miocene, Fiji.

Graphepleurus granularis Clark, 1945, p. 315, by original designation.

• Only the type species.

Euechinoidea, Camarodonta; Temnopleuroida, Trigonocidaridae.

Monotypic: subjective junior synonym of Javanechinus Jeannet, 1935

Does not appear to be significantly different from Javanechinus.

Clark, H. L. 1945. Bernice P. Bishop Museum Bulletin 181, p. 315-316, pl. 41, figs F, G.