Andalgalomys pearsoni (Myers, 1977) . Occas. Pap. Mus. Zool., Univ. Michigan, 676:1.

TYPE LOCALITY: Paraguay, Boqueron Dept., 410 km (by road) NW Villa Hayes .

DISTRIBUTION: Chaco of W Paraguay and SE Bolivia (Santa Cruz).

SYNONYMS: dorbignyi.

COMMENTS: Diploid count differs by one pair (76, 78) in the two subspecies (Myers, 1977; Olds et al., 1987).