The karyotypes of nine species of Korean bagrid and silurid catfishes were examined to obtain karyological information of this group of teleosts. Chromosome morphologies and numbers generally showed high variability from species to species. The presen...
The karyotypes of nine species of Korean bagrid and silurid catfishes were examined to obtain karyological information of this group of teleosts. Chromosome morphologies and numbers generally showed high variability from species to species. The presence of microchromosomes in one species of silurids was detected. This is the first finding of microchromosomes in the entire teleostean fishes. In some other species, chromosomes bearing large secondary constrictions with heteromorphism were also found. Karyologic and evolutionary implications of the results are discussed.