ammonites
Maichelasma Fomichev 1953 (horn coral)

Anthozoa - Stauriida - Polycoeliidae

Parent taxon: Polycoeliidae according to S. Z. Guo 1980

Sister taxa: Endotheciinae, Polycoeliinae, Prosmiliinae, Sochkineophyllum, Tachylasmatinae

Subtaxa: none

Ecology: stationary epifaunal suspension feeder