Abundance: 0.03 to 1.59% (median 0.08%)

Latitudinal range: 38.9° to 56.3°

Habitats: (4) only

Found in 4 samples

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

United States: Scovill (Holocene)

See also Mergus, Mergus merganser, Mergus serrator