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Table 1 Karyotypes of species from group longicaudatus from literature and present work (2n = diploid number; FN = Fundamental Number; M-male; F- female)

From: Proechimys (Rodentia, Echimyidae): characterization and taxonomic considerations of a form with a very low diploid number and a multiple sex chromosome system

  2n FN Geographic location Reference
Taxon     
P. gularis a 30(M) 48 Limoncocha (Napo, Equador) *
P. brevicauda 28-30(M/F) 48-50 South of Peru *
P. brevicauda 28(M/F) 48 Juruá river (Acre, Brazil) ***
P. brevicauda 30(M) 48 Cenepa river (Amazonas and Peru) *****
P. longicaudatus 28(M/F) 46 Right side, Madeira river (Amazonas, Brazil) **
P. longicaudatus 30(F) 52 Jamari river (Rondonia, Brazil), Juruena and Aripuanã (Mato Grosso, Brazil) ****
P. longicaudatus 28(M/F) 48 Samuel Hydroelectric reservoir, Jamari river (08°45 S,63°26 W), Rondônia, Brazil ****
P. longicaudatus 28(M/F) 50 Apiacás (09°34 S, 57°23 W), Mato Grosso-MT, Brazil ****
P. longicaudatus 28(M) 50 Emas National Park (18°15 S, 52°53 W), Goiás, Brazil ****
P. gr. longicaudatus 17(M) 14 Tanguro farm, Querência, MT, Brazil (12° 54″S; 52° 22″W); São Nicolau Farm, Cotriguaçu-MT, Brazil (S09°5117.6″/W058°1453.8″//S09°4924.9″/W058°1532.0″). Present work
P. gr. longicaudatus 16(F) 14 Tanguro farm, Querência, MT, Brazil (12° 54″S; 52° 22″W); São Nicolau Farm, Cotriguaçu-MT, Brazil (S09°5117.6″/W058°1453.8″//S09°4924.9″/W058°1532.0″). Present work
  1. References: *[8]; **Ribeiro (2006 unpublished data); ***[4]; ****[12]; *****[13].
  2. a Species understood as synonymous to P. brevicauda[2].