Comments: Considered a distinct species by Ellerman (1940) and Nowak (1999); but see Cabrera (1961:547) who provisionally included it in brasiliensis. Although six different karyotypes attributed to C. torquatus have been reported (Freitas and Lessa, 1984; Kiblisky et al., 1977; Reig et al., 1966), two of those (2n=56 and 70) were from populations currently recognized as C. pearsoni (Novello and Lessa, 1986). Populations of C. torquatus from S Brazil and N Uruguay have 2n=44-46 (FN=72) and population...
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