Calomys laucha ()
Mass: 13.8 g based on Courtalon et al. 2003 and Miller and Anderson 1977
Latitudinal range: -34.6° to -20.3°Habitats: temperate savanna (1), temperate broadleaf/mixed forest (2), tropical/subtropical savanna (1)
Found in 4 samples
Argentina: Santa Fe City, Buenos Aires Province, Chucul
Brazil: Serra da Canastra National Park (rat traps)
Size measurements:
| body mass | 14 g | N = 40 | Courtalon et al. 2003 |
| body mass | 12.6 g | N = 5 | Miller and Anderson 1977 |
| front foot length | 4.82 mm | N = 5 | Miller and Anderson 1977 |
| head and body length | 69.5 mm | N = 5 | Miller and Anderson 1977 |
| hind foot length | 16.0 mm | N = 5 | Miller and Anderson 1977 |
| skull length | 20.34 mm | N = 5 | Miller and Anderson 1977 |
| tail length | 53.0 mm | N = 5 | Miller and Anderson 1977 |
| total body length | 122.5 mm | N = 5 | Miller and Anderson 1977 |
See also Calomys, Calomys C. laucha-C. musculinus, Calomys callosus, Calomys cerqueirai, Calomys expulsus, Calomys gidleyi, Calomys musculinus, Calomys sp., Calomys tener, Calomys tocantinsi, Calomys venustus, Calomys yazhi