PaleoDB taxon number: 46902
Alternative combination: Peratherium youngi
Synonyms: Herpetotherium spindleri Macdonald 1963 (no. 46898), Peratherium spindleri Macdonald 1963 (no. 50141)
- Herpetotherium youngi: Its type locality is Young Site, which is in a Harrisonian terrestrial sandstone in the Harrison Formation of Nebraska
- Peratherium spindleri: SDSM 54343, a mandible (fragment of right mandible, with m1-4 and the roots of p3-4.). Its type locality is Sharps (SDSM V-5354), which is in a Geringian terrestrial horizon in the Sharps Formation of South Dakota.
Ecology: ground dwelling omnivore
Average measurements (in mm): M1 1.78 x 1.94, M2 1.83 x 2.10, M3 1.86 x 2.31, m1 1.76 x 1.02, m2 1.92 x 1.14, m3 2.00 x 1.18
Estimated body mass: 41.5 g based on M1 length, M1 width, M2 length, M2 width, M3 length, M3 width, m1 length, m1 width, m2 length, m2 width, m3 length, and m3 width