Arctocyon montanensis (extinct)
Variant names:
 Arctocyonides montanensis
 Claenodon montanensis
 Claenodon silberlingi
 Colpoclaenus silberlingi
 Neoclaenodon montanensis
 Neoclaenodon silberlingi

Latitudinal range: 44.9° to 46.2°
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Found in 4 samples

United States: Gidley Quarry (Early Palaeocene), Scarritt Quarry (Early Palaeocene), Douglass Quarry (Middle Palaeocene), Rock Bench Quarry (Early Palaeocene)

See also Arctocyon, Arctocyon ferox, Arctocyon latidens, Arctocyon mumak, Arctocyon nexus, Arctocyon sp., Arctocyon sp. large, Arctocyon sp. small