Diagnosis | Stem group Echinacea with:
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Range | Jurassic (Pliensbachian) to Cretaceous, Europe, North America, Middle East, North Africa. |
Classification and/or Status | Euechinoidea, Acroechinoidea, Echinacea |
Remarks | Distinguished from arbacioids by their diadematid-style ambulacral plate compounding. Distinguished from pedinopsids and Pseudodiadematidae by their imperforate, non-crenulate tubercles. Pomel, A. 1883. Classification méthodique et Genera des Échinides vivante et fossiles. Thèses présentées a la Faculté des Sciences de Paris pour obtenir le Grade de Docteur ès Sciences Naturelles 503, Aldolphe Jourdan, Alger, 131 pp. |