Class: CEPHALOPODA --- Taxon Tree: AMMONOIDEA [Subclass] - AMMONITIDA [Order] - PERISPHINCTOIDEA [Superfamily] ------ Family: PERISPHINCTIDAE Steinmann, 1890 † (Sea) --------- SubFamily: VIRGATOSPHINCTINAE ------------ Genus: Zenostephanus Callomon & al., 2009 †
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