Article: New molecular biology research from M.L. Terencio et al outlined.

"Comparative cytogenetic analyses of hatchetfishes Carnegiella marthae and Camegiella strigata (Gasteropelecidae) from the Rio Negro basin were performed using conventional Giemsa staining, silver (Ag)-staining and C-banding. The diploid chromosome numbers of both species equaled 2n = 50 but their karyotypes were distinct," scientists in Manaus, Brazil report (see also Molecular Biology).

"We found evidence for sex chromosomes in C. marthae since karyotype of males presented 20 M + 12 SIM + 4 ST + 14 A and ZZ ST chromosomes while the females presented 20 M + 12 SM + 4 ST + 14 A and ZW ST chromosomes of distinct size. Conversely, C. strigata presented 4 M + 4 SM + ...

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