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Class: HYOLITHA
--- Taxon Tree: CIRCOTHECIDA [Order]
------ Family: SPINULITHECIDAE Sysoev, 1968 † (Sea) (FOSSIL)
DB counters=11, Genus=4, Subgenus=0, Species=5, Subspecies=0, Synonyms=1, Images=0
DB counters include Fossil taxa: Species=5, Subspecies=0
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annae, Ladatheca annae (Sysoev, 1959) † (FOSSIL)
billingsi, Spinulitheca billingsi (Sysoev, 1962) † (FOSSIL)
cuspidata, Malykanotheca cuspidata Meshkova, 1974 † (FOSSIL)
kuteinikovi, Spinulitheca kuteinikovi Missarzehevsky, 1969 † - syn of: Circotheca kuteinikovi (Missarzehevsky, 1969) † (FOSSIL)
secunda, Spinulitheca secunda (Sysoev, 1968) † (FOSSIL)
sulcata, Aldanotheca sulcata Meshkova, 1974 † (FOSSIL)
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