Cytogenetic data available in the literature and obtained in the present study for Oecomys paricola.

Species analyzed with Hylaeamys megacephalus probes in the present study are highlighted in bold in the leftmost column. The clades identified for O. paricola (northern, eastern and western; sensu [4]) are also shown within parentheses. Localities 1–4 refer to those mentioned in Fig 1; localities 2 and 5–7 are from the present study. Brazilian (BR) states are Mato Grosso (MT), Pará (PA) and Piauí (PI). The museum numbers of specimens analyzed in the present study are provided. Abbreviations: diploid number (2n); autosomal fundamental number (FN); Museu Paraense Emílio Goeldii (MPEG); Museu de Zoologia da Universidade Federal do Pará (MUFPA); male (♂); female (♀).