†Leptomeryx mammifer Cope 1886 (ruminant)
Mammalia - Artiodactyla - Hypertragulidae
Alternative combination: Trigenicus mammifer
Belongs to Leptomeryx according to J. E. Storer 1981
Sister taxa: Leptomeryx blacki, Leptomeryx elissae, Leptomeryx evansi, Leptomeryx exilis, Leptomeryx obliquidens, Leptomeryx significans, Leptomeryx speciosus, Leptomeryx yoderi
Ecology: ground dwelling frugivore
Average measurements (in mm): m1 8.40 x 6.60