Bivalvia - Ostreida - Gryphaeidae

Alternative spelling: Ostrea (Gigantostrea)

Parent taxon: Pycnodonteinae according to H. E. Vokes 1980

Sister taxa: Hyotissa, Hyotissini, Labrostrea, Neopycnodonte, Neopycnodonteini, Pycnodonte, Pycnodonteini

Subtaxa: Gigantostrea gigantica, Gigantostrea trigonalis

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Ecology: stationary epifaunal suspension feeder