Class: CEPHALOPODA --- Taxon Tree: AMMONOIDEA [Subclass] - AMMONITIDA [Order] - ANCYLOCERATINA [Suborder] - ANCYLOCERATOIDEA [Superfamily] ------ Family: CRIOCERATITIDAE Wright, 1952 † (Sea) ------------ Genus: Pseudothurmannia Spath , 1923 †
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