The Karyotypes of Trinomys Moojeni (Pessôa, Oliveira & Reis, 1992) and Trinomys Setosus Elegans (Lund, 1841) (Rodentia, Echimyidae) from Minas Gerais, Eastern Brazil
Two new karyotypes of species in the genus Trinomys are described from specimens collected recently in Morro do Pilar and Santa Bárbara, Minas Gerais State (MG), Brazil. Trinomys moojeni from Morro do Pilar had 2n=56 and FN=106 and T. setosus elegans from Santa Bárbara had 2n=56 and FN=104. Besides the differences in FN, different morphologies in the sex chromosomes also had been detected. These results at chromosomal level corroborate findings from the mitochondrial genome that suggest that T. s. elegans belongs to a clade composed by T. s. setosus and T. s. denigratus. The chromosomal data corroborated the inclusion of T. moojeni in this clade, as previously suggested on the basis of cranial morphology evidence.
