Umbonium (Suchium) Makiyama 1924 (top snail)
Gastropoda - Trochoidea - Trochidae
Parent taxon: Umbonium according to C. S. Hickman and J. H. McLean 1990
See also Sepkoski 2002
Sister taxon: Umbonium vestiarium
Subtaxa: Umbonium (Suchium) suchiense
Ecology: epifaunal grazer-suspension feeder
Distribution: