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Supernumerary System in Proechimys Iheringi Iheringi (Rodentia, Echimyidae), from the State of São Paulo, Brazil

1985; University of Florence; Volume: 38; Issue: 2 Linguagem: Inglês

10.1080/00087114.1985.10797742

2165-5391

Yatiyo Yonenaga-Yassuda, Maria José de Souza, Sanae Kasahara, M. L’Abbate, Hsi Tien Chu,

Evolution and Paleontology Studies

SUMMARYIn a sample of 13 animals (8 males and 5 females) of the spiny rat Proechimys iheringi theringi from three localities of the State of São Paulo (Casa Grande, Ubatuba and Iguape) the diploid numbers were 2n = 61, 62, 63, 64 and 65 chromosomes due to the presence of 1, 2, 3, 4 and 5 minute supernumerary chromosomes, respectively. G- and C-band patterns, localization of the nucleolus organizer regions (NOR's) and R-banding obtained after 5-BrdUrd incorporation are presented.