Calomys laucha (Olfers, 1818) . In Eschwege, Neue Bibl. Reisenb., 15(2):209.

TYPE LOCALITY: Paraguay, Vicinity of Asuncion .

DISTRIBUTION: S.E. Brazil; Paraguay; Uruguay; C. Argentina; S. Bolivia.

COMMENT: Includes dubius, gracilipes, and tener; see Hershkovitz, 1962, Fieldiana Zool., 46:150- 153. Formerly included hummelincki (See Handley, 1976, Brigham Young Univ. Sci. Bull. Biol. Ser., 20(5): 53) and musculinus (see Massoia et al., 1968, Rev. Invest. Agro. INTA, ser. 1, Biol. Prod. Anim., 5:63-92). AL attributed laucha to Fischer, 1814; see comment under Reithrodon physodes .

ISIS NUMBER: 5301410008006006001 as C. laucha .

5301410008006002001 as C. dubius.

5301410008006005001 as C. gracilipes.

5301410008006009001 as C. tener.