Abstract
Karyological information on 8 genera in 5 families of the teleostean fish order Osteoglossiformes are presented and compared.Among notopterids, Xenomystus nigri and Notopterus chitala have 42 acrocentric chromosomes in diploid number, whereas Papyrocranus afer has 34 including 4 non-acrocentrics.Two species of mormyrids, Gnathonemus petersii and Marcusenius brachistius have 48 chromosomes.Diploid chromosome numbers of other species examined are Hiodon alosoides, 50; Osteoglossum bicirrhosum, 56; Pantodon bucholzi, 48.Some comments are made on interpretations of their karyotypes.
