Bivalvia - Protobranchia - Nuculanidae

Alternative combinations: Leda washingtonensis, Nuculana washingtonensis

Full reference: C. E. Weaver. 1916. Tertiary faunal horizons of western Washington. University of Washington Publications in Geology 1(1):1-67

Belongs to Litorhadia according to E. J. Moore 1976

Sister taxa: Calorhadia (Litorhadia) bastropensis, Calorhadia (Litorhadia) compsa, Calorhadia (Litorhadia) evanescentior, Calorhadia (Litorhadia) lisbonensis, Calorhadia (Litorhadia) mater, Calorhadia (Litorhadia) santaanai

Ecology: facultatively mobile infaunal deposit feeder-suspension feeder