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Class: HYOLITHA
--- Taxon Tree: HYOLITHIDA [Order]-HYOLITHINA [Suborder]
------ Family: PTERYGOTHECIDAE Novak, 1891 † (Sea) (FOSSIL)
DB counters=3, Genus=1, Subgenus=0, Species=1, Subspecies=0, Synonyms=0, Images=0
DB counters include Fossil taxa: Species=1, Subspecies=0
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