Mass: 21.3 g based on Smith and Foster 1957

Abundance: 0.01 to 4.28% (median 1.51%)

Latitudinal range: 36.3° to 58.8°

Habitats: (5), boreal forest/taiga (1)

Found in 6 samples

Canada: Churchill (1952)

United States: Bat Cave (Late Pleistocene), Robinson Cave (Late Pleistocene), Bootlegger Sink (Pleistocene - Holocene), New Paris Sinkhole No. 4 (Late Pleistocene), Natural Chimneys (Late Pleistocene)

body mass	21.3 g	N = 10	Smith and Foster 1957
hind foot length	19 mm	N = 10	Smith and Foster 1957
hind foot length	19 mm	N = 1	Quay 1955
hind foot length	20 mm	N = 1	Quay 1955
hind foot length	20 mm	N = 1	Quay 1955
tail length	23 mm	N = 10	Smith and Foster 1957
tail length	22 mm	N = 1	Quay 1955
tail length	23 mm	N = 1	Quay 1955
tail length	24 mm	N = 1	Quay 1955
total body length	118 mm	N = 10	Smith and Foster 1957
total body length	127 mm	N = 1	Quay 1955
total body length	117 mm	N = 1	Quay 1955
total body length	115 mm	N = 1	Quay 1955

See also Synaptomys, Synaptomys australis, Synaptomys cooperi, Synaptomys sp.