Abundance: 0.30 to 0.42%

Latitudinal range: 36.8° to 43.4°

Habitats: (2) only

Found in two samples

United States: Quartz Basin (UOloc 2465) (Middle Miocene), Whisenhunt Quarry (Late Miocene)

See also Macrognathomys gemmacollis, Macrognathomys sp.