CYTOGENETIC STUDIES OF 3 SPECIES OF GLANDULOCAUDINAE (PISCES, CHARACIFORMES, CHARACIDAE)

Cytogenetic studies of three species of the subfamily Glandulocaudinae showed that Mimagoniates microlepis presents 2n=52 chromosomes (6M+20 SM+18ST+8A), Mimagoniates lateralis presents 2n=52 chromosomes (6M+20S M+16ST+10A) and Glandulocauda melanogenys presents 2n=52 chromosomes ( 4M+12SM+22ST+14A). The number of NOR-bearing chromosome pairs ranged f rom two to four. Differences in number and position of NORs at the spe cies and population levels were detected, suggesting that several chro mosome rearrangements occurred in the evolutionary process of this gro up. Some aspects related to the chromosome evolution of the Glanduloca udinae are discussed.