Abundance: 0.03 to 0.73% (median 0.38%)

Latitudinal range: 43.8° to 56.3°

Habitats: (4) only

Found in 4 samples

Canada: Charlie Lake Cave (Zone IV) (Holocene), Keffer (Midden 57, screened) (Holocene), Pender Canal Site (trench) (Holocene), Spillsbury Bay (Holocene)

See also Bucephala albeola, Bucephala sp.