Chacoan Marsh Rat – Holochilus chacarius

Holochilus chacariusThomas, 1906

Accepted name, Mammal Species of the World 2005

Considered distinct by Massoia (1980a), who treated balnearum as a synonym; Reig (1986) mentioned balnearum as another good species. Highly variable in diploid (2n = 48-56) and fundamental numbers (Nachman, 1992b; Nachman and Myers, 1989; Vidal et al., 1976). Nachman (1992a) recognized Paraguayan samples (as H. brasiliensis chacarius) as karyotypically distinguishable and specifically distinct from Argentinian populations (as H. vulpinus).

• Wilson, D and Reeder, D. (eds.) 2005. Mammal Species of the World. A Taxonomic and Geographic Reference. 3rd ed. -- 2142 pp. Johns Hopkins University Press.