[=Hypodiadema Desor, 1858, p. 61, type species Hemicidaris saleniformis Desor, 1853; =Prodiadema Pomel, 1869, p. 38, type species Cidarites agassizi Roemer, 1839 ]
Diagnostic Features |
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Distribution | Middle Jurassic (Callovian) to Lower Cretaceous (Valanginian) Europe. |
Name gender | feminine |
Type | Hemicidaris diademata Agassiz, 1838, p. 49, by subsequent designation of Lambert & Thiery, 1910, p. 168. |
Species Included |
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Classification and/or Status |
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Remarks | Distinguished from Hemicidaris by the very rudimentary nature of the primary tubercles on adapical interambulacral plates. |