†Eumarcia (Opimaria) Marwick 1948
Bivalvia - Cardiida - Veneridae
Alternative spellings: Opimarcia, Opimaria
Parent taxon: Eumarcia according to L. R. Cox et al. 1969
See also Sepkoski 2002
Sister taxa: Eumarcia (Atamarcia), Eumarcia (Eumarcia), Eumarcia fumigata
Subtaxa: none
Distribution: there are no occurrences of Eumarcia (Opimaria) in the database