Diagnostic Features |
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Distribution | Upper Jurassic (Oxfordian) to Lower Cretaceous (early Albian) western Europe, Mexico and southern USA. |
Name gender | neuter |
Type | Cidarites pseudodiadema Lamarck, 1816, p. 59, by original designation. |
Species Included |
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Classification and/or Status |
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Remarks | Distinguished by its small hemicyclic apical disc from all Emiratiidae. Distinguished from Hessotiara by having no sharp decline in the size of ambulacral tubercles on the aboral surface. |