Class: CEPHALOPODA --- Taxon Tree: AMMONOIDEA [Subclass] - AMMONITIDA [Order] - STEPHANOCERATOIDEA [Superfamily] ------ Family: SPHAEROCERATIDAE Buckman, 1920 † (Sea) --------- SubFamily: EURYCEPHALITINAE ------------ Genus: Sphaeroceras Krimholz, 1939 †
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