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Class: HYOLITHA
--- Taxon Tree: HYOLITHIDA [Order] - HYOLITHINA [Suborder]
------ Family: PTERYGOTHECIDAE Novak, 1891 † (Sea) (FOSSIL)
DB counters: Genus=1, Subgenus=0, Species=1, Subspecies=0 ( 0 Species and 0 Subspecies have images)
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Genus: Pterygotheca Novak, 1891 † (DB: 1 SP, 0 IMG)
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