Contributed by Philippe Nicolleau, April 2009
[Collyrites cheveti sp. nov. Vadet, Nicolleau & Pineau 1998, p. 55]
Diagnostic Features |
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Distribution | Middle Jurassic (Upper Callovian) France, Morocco |
Classification and/or Status | Irregularia; stem group atelostomata ('disasteroids'); Collyritidae. A species of Smithiaster |
Remarks | S. cheveti differs from the type species S. loryi in having a much lower test profile, its adoral surface flatter and its ambulacral pores larger. The junction between ambitus and adoral surface is angular rather than rounded. Vadet, Nicolleau & Pineau 1998. Echinides du Callovien superieur de la Sarthe et de l'Orne; II b : les echinides irreguliers- description. Memoires de la Societe Academique du Boulonnais. Serie Histoire Naturelle 19, 1-128, pls 1-40. |