Sampling sites plotted on the Amazon basin map, Amazonas State: 1 Japurá River, Japurá city 2 Juruá River, Juruá city 3 Negro River, Santa Isabel do Rio Negro city 4 Purus River, Tapauá city 5 Cuieiras River, Manaus city 6 Manaus city, urban área: Federal University of Amazonas’s campus (UFAM) and Isaac Sabá Oil Refinery) 7 Aripuanã River, Novo Aripuanã city 8 Uatumã River, Presidente Figueiredo city 9 Jatapú River, São Sebastião do Uatumã city; Pará State: 10 Trombetas River, Oriximiná city 11 Tapajós River, Aveiro and Santarém cities 12 Jari River, Almeirim city; Rondônia State: 13 Madeira River, Porto Velho city. Geographic coordinates at the Table 1.

 
 
  Part of: Silva CEF, Andrade RA, de Souza EMS, Eler ES, da Silva MNF, Feldberg E (2017) Comparative cytogenetics of some marsupial species (Didelphimorphia, Didelphidae) from the Amazon basin. Comparative Cytogenetics 11(4): 703-725. https://doi.org/10.3897/compcytogen.v11i4.13962