NEW CASES OF SUPERNUMERARY CHROMOSOMES IN CHARACIFORM FISHES

Meiotic chromosome number is 2n = 3x = 81 and the presence of lagging chromosomes at telophase II is mentioned for the first time; three sets of chromosome occur at

Despite its macro-structural karyotype stability, the occurrence of B chromosomes has been described in some curimatids, such as Cyphocharax modestus (Venere and Galetti, 1985;

Other population of this same species also presented 2n=50 chromosomes, but differing in the karyotype formula and with macro supernumerary chromosome found in 100% of the cells

The basal diploid number of 2n = 54 chromosomes proposed for Loricariidae (Artoni & Bertollo, 2001) seems to corroborate the inferences about the putative ancestor karyotype of 2n

Silver nitrate staining of the chromosomes in specimens from tributaries of the rio Tibagi showed until three stained chromosomes with marks located at terminal region on long arms

In species with holokinetic chromosomes, however, two additional mecha- nisms are assumed to increase chromosome number varia- tion: agmatoploidy (the fission of all of the

In classical cytogenetic studies in Aloe, secondary constrictions on the long arms of one or two pairs of large chromosomes and/or on the short arms of a pair of small chromosomes

The presence of a heteromorphic pair of submetacentric chromosomes in the analyzed specimens, not present in males and females with 2n = 50 previously reported, and