Comparative cytogenetics between two species of the family Pseudopimelodidae (Siluriformes): occurrence of natural triploidy and supernumerary chromosomes
1. Laboratório de Citogenética Animal, Departamento de Biologia Geral, Centro de Ciências Biológicas (CCB), Universidade Estadual de Londrina, P.O Box 6001, Londrina, Paraná, 86051-970, Brazil