PaleoDB taxon number: 48547
Alternative combination: Cynodontomys angustidens
Synonyms: Cynodontomys alfi McKenna 1960 (no. 45479), Microsyops alfi McKenna 1960 (no. 48546)
Full reference: W. D. Matthew. 1915. A revision of the Lower Eocene Wasatch and Wind River faunas. Bulletin of the American Museum of Natural History 34
- Microsyops angustidens: A.M.N.H. No. 15073, a mandible (fragmentary left mandible with P3-M3 and fragment of right mandible with P4-M2). Its type locality is Microsyops angustidens type locality, which is in a Wasatchian terrestrial horizon in the Willwood Formation of Wyoming.
- Cynodontomys alfi: U.C.M.P. No. 44777, a maxilla (fragmentary right maxilla with M1-3). Its type locality is Timberlake Quarry, which is in a Wasatchian terrestrial horizon in the Wasatch Formation of Colorado.
Ecology: scansorial insectivore
Average measurements (in mm): M1 3.13 x 3.76, M2 3.37 x 4.25, M3 3.01 x 3.49, m1 3.33 x 2.43, m2 3.53 x 2.61, m3 3.67 x 2.29