ammonites
Guynia Duncan 1837 (stony coral)

Anthozoa - Scleractinia - Guyniidae

Parent taxon: Guyniidae according to J. W. Wells 1956

Sister taxa: Cyathosmilia, Onchotrochus, Pourtalocyathus, Schizocyathus, Stenocyathus

Subtaxa: Guynia annulata

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Ecology: stationary intermediate-level epifaunal suspension feeder