| cytogenetic analysis of four central amazonian species of colostethus (anura - dendrobatidae) with a diploid complement of 22 chromosomes. | colostethus marchesianus from the type locality and three related species had 2n = 22 chromosomes, which differed from most other colostethus species that have 2n = 24 chromosomes. the species analyzed were morphologically similar and showed a conservative karyotype, although they could be distinguished from each other by their c-banding pattern. additional nor sites, heteromorphism in nor size and heterochromatin, and an additional rdna site detected by fish, were observed. these data suggest t ... | 2003 | 15061800 |