Table 1. Chromosomal homology among species from Oryzomyini and Akodontini tribes, revealed with Hylaeamys megacephalus (HME) whole-chromosome probes [23]. Oryzomyini Akodontini OCA- OCA- HME CLA NSP-A NSP-B NSP-C NSP-D NPA NSP-E NAM TNI AMO ASP NLA OAM BBR PA RJ 1q 13, 16, 13, 17, 1q int., 5q 1 2q, 20 6, 8 2p, 4q 6, 8 6, 8 6, 8 6, 8 6, 8 4, 8 dist., 12, 13 2p, 4q 29 28 2q dist. dist., 7 4q 1p 10, 18, 1q int., 9q int., 2 4 1p, 4 2 3q 2 2 2 2 2 7, 12 dist., 8 5q 19 7q 13 2q int. 1 int. 1q int., 3 1 1q 3 2p 3 3 3 3 3 and 2q 2p dist. 3q dist. 1q dist. 1q dist. 3p dist. 1q 2q prox., 1p prox. 10q 4 5, 13 2 2 1q dist. 1q dist. 1q dist. 1q dist. 1q dist. 1q dist. 1q dist. 13, 15 prox., and 9, 24 3q prox., 5p dist. int., 3q 11q int. dist. 6q 1p int. 1p 3p dist., 2p 3q 3q 15q 15q 2 dist., 3q int., and dist., 19, 22, dist., 9, 28, 12q prox., 7q, 9q 5 dist., dist., dist., dist., 19, 26 9, 17 5 prox., 6p int., prox., 1q 24, 26p 21, 22, 31 int., 3p, 23, dist. 15, 27 15, 27 19, 24 19, 23 6 prox. 10 3q int. prox., 8 24 14q 25 (ts) dist. 5q 5q 5q 5q 5q 5q 9, 25, 5q 3 prox. 7q 2q 6 4q dist. 9, 16 prox., prox., prox., prox., prox., prox., 2p 2p int. 2q int. 26 prox., 8 and int. prox. prox. 18 18 18 18 19 18 5q 1q int., 11q 1p 7, 9q 3p int., 7, 9q 7, 9q 7, 9q 7, 10q 7, 10q 1p int., 7 3q int. 7 7 18 prox., 4q prox., prox., int. 5p int. int. int. int. int. 3q int. 8q prox. 15 9p 4p 4q 3q 8 5 5 12, 13 6, 15 12, 13 12, 13 12, 13 12, 16 12, 16 6 dist. 3p 1q int. 10 prox., prox., 7 prox. 6q 1q 2p 3q 3q 1p 9q (ts), 1p, 3p 9q (ts), 9q (ts), 9q (ts), 10q 10q 2 prox., 1q int., dist., 11q (9,10) dist., prox., prox., 5q, 9p dist., 10 int. (ts) 10 10 10 (ts), 14 (ts), 14 5 dist. 3q int. 6q dist., 17 3q dist. 12 12 8p prox. 10q 2q 6q 6q 9 dist., 11q 1p int., 2q int., int., dist., 11 dist., 8 dist.; 20, 23p 11, 26 20, 22 20, 22q 14, 25p 24, 25 22, 23 10 3p dist. prox., 6 6q dist. 3q dist. 12q 16q dist. 8q dist. prox. dist. prox. 2p 4q 4q 4q 4q 4q 4q 4q 5q 12 14 14 16 1q int. 2q int. 18 8q prox. prox. prox. prox. prox. prox. prox. prox. prox. 3q 4q 10q 10q 5p 9 prox., prox., dist., 2p dist., dist., 1q int., 1q int., dist., 1q (ts), 1q int., 1q int., 1q int., 1q int., 1q int., 1q int., 11 int. 4p 12q dist., (13,22) 18q 19q 26q, 3q int. 9q 9 19, 23 21, 28p 21, 28p 20, 21 21, 23 19, 21 and dist., prox., 3q, 14q prox., prox., 27p (ts) prox., dist., 21 6q 14q dist. 22 22 12 prox. prox. 23q, 25q, 24q, 17 6p 7p 1p int., 3q int., 3q int., 16, 24p 1p int., 2q int., 21q 14 25p 20, 25 26p 25p 26, 28 24, 26 prox., prox., proxim 21 30 29 prox. 3q int. 15q int. int., 26 prox. prox. prox. 24 8p int. al, 13 15 12 11 11 15 9 17 17 15 15 15 19 9q 1q dist. 8q dist. 19 6p 1q 2p 2q 4q 1p 4p prox., 4q 4q 4q 4q 4q 4q 10 dist., prox., prox., 4, 16q (16,17) 19, 20 20, 24 dist., dist., dist., 11q dist., 16 dist., 10 dist., 16 dist., 16 dist., 22 dist., 20 22 2q int., 10q dist. 25q 3q dist. 10p dist. 3q int. dist. 1q 3q 2p int., 3p 15q 15q 1 prox., prox., prox., 1p 18 16 21 21 17 7 17 27 25 2q int., prox., prox., prox. 23 5p 9q prox., 5 3q int. 10q prox. prox. 8p 15q 21q 1p int., 24p 6q int., 6q int., 14, 25p 14, 26p 14, 25p dist., 1p int. prox. (prox. 19 3q 18 dist., 18 17 17 dist. 7p dist. 28 26 dist. dist. dist. 8q (ts) and and prox. 24q prox. dist. dist.) 1q 10q 10q 1q 1q 1q 1q 1q 1q 1q 11 4q 14q 5p 20 1q dist. prox. 4q int. prox. prox. prox. prox. prox. prox. prox. prox. prox. prox. prox. prox. prox. and int. 4p, 4q 18q 19q 21 5q dist. 5q dist. 5q dist. 5q dist. 5q dist. 5q dist. 5q dist. 3 dist. 2p dist. 2p int. 2q dist. 7q dist. 2q dist. int. dist. dist. 6q 6q 25q, 8q 23 15 prox., prox., 21, 25q 14, 16 23, 26q 23 13, 20 13, 29 20 7p 1p int. 20 3p int. 26q prox. 23 23 3q int. 24 14 17 18 11 12 11 11 11 11 11 14 6p dist. 9q dist. 22 11q (ts) 3q int., 1p 2p 2p int., 1q 25 17 24 25 28 13 27 27 27 29 27 1 prox. 11q dist., prox. 3q int. prox. prox. 1q int. 8q 8q 26 22 27q 17 28q 28q 22 30 30 25 11 4 16 6 11p prox. prox. X X Xq Xq Xq X Xq Xq X Xq Xq X X (Xq) X X Xq X Legend: Short arm (p). Long arm (q). Proximal (prox). Interstitial (int). Distal (dist). Two segments (ts). Hylaeamys megacephalus (HME), Cerradomys langguthi (CLA) [23], O. catherinae-Pará (OCA-PA), O. catherinae-Rio de Janeiro (OCA-RJ) [26], Neacomys sp. A (NSP-A), Neacomys sp. B (NSP-B) [8], Neacomys sp. C (NSP-C), Neacomys sp. D (NSP-D), N. paracou (NPA), Neacomys sp. E (NSP-E), and N. amoenus (NAM) [9], Thaptomys nigrita (TNI), Akodon montensis (AMO) [24], Akodon sp. (ASP), Necromys lasiurus (NLA) [25], Oxymycterus amazonicus (OAM), Blarinomys breviceps (BBR) (present study). .