Calomys callosus Rengger 1830 (big laucha)
Osteichthyes - Glires - Cricetidae
PaleoDB taxon number: 237188
Alternative combination: Mus callosus
Belongs to Calomys according to C. R. Bonvicino et al. 2003
Sister taxa: Calomys (Calomys), Calomys expulsus, Calomys hummelincki, Calomys laucha, Calomys musculinus, Calomys tener, Calomys tocantinsi
Ecology: scansorial insectivore
Average measurements (in mm): skull 22.9 x 13.2