†subfamily Promacrinae Scarlato and Starobogatov 1979 (clam)
Bivalvia - Solenida - Solenomorphidae
Parent taxon: Solenomorphidae according to J. G. Carter et al. 2011
See also Bouchet et al. 2010
Sister taxa: Solenomorpha, Solenomorphinae
Subtaxa: Promacrus
Ecology: facultatively mobile infaunal suspension feeder
Distribution: found only at US Fisheries, Baird ( of California)