KARYOTYPE AND NUCLEOLUS ORGANIZER REGIONS OF PYRRHULINA CF AUSTRALIS (PISCES, CHARACIFORMES, LEBIASINIDAE)
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Data
1991-09-01
Autores
Oliveira, C.
Andreata, A. A.
Toledo, LFA
Toledo, S. A.
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Soc Brasil Genetica
Resumo
The mitotic chromosomes and nucleolus organizer regions (NORs) of the Upper Parana Basin fish Pyrrhulina cf. australis were studied. The karyotype (2n = 40; 6st + 34a) is characterized by the presence of four chromosome pairs with NORs, one of them with NORs in both terminal regions. Comparison of this karyotype with those of other Characiformes, revealed a strong similarity to the family Erythrinidae.
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Revista Brasileira de Genetica. Ribeirao Pret: Soc Brasil Genetica, v. 14, n. 3, p. 685-690, 1991.