Class: CEPHALOPODA --- Taxon Tree: AMMONOIDEA [Subclass] - CERATITIDA [Order] - TRACHYCERATOIDEA [Superfamily] ------ Family: TRACHYCERATIDAE Haug, 1894 † (Sea) --------- SubFamily: ARPADITINAE ------------ Genus: Silenticeras McLearn , 1930 †
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