2 documents found, page 1 of 1
Cytogenetics and sperm ultrastructure of Atelopus spumarius (Anura, Bufonidae) ...
Siqueira, Sérgio; Aguiar-Júnior, Odair; Lima, Albertina Pimental; Pimentel, Shirlei Maria ReccoThe current taxonomy of most Atelopus species is based on morphological and color data only. Recent studies suggest that A. spumarius may represent a species complex assigned under the same name. Karyotypic data and description of sperm ultrastructure for 13 specimens of A. spumarius are presented here for the first time. A chromosomal analysis revealed 2n = 22 chromosomes, with centromeric heterochromatin in a...
Unusual intra-individual karyotypical variation and evidence of cryptic species...
Siqueira, Sérgio; Aguiar-Júnior, Odair; Souza, Moisés Barbosa; Lima, Albertina Pimental; Pimentel, Shirlei Maria ReccoWe report a cytogenetic analysis of three Pristimantis fenestratus frog populations of the Amazon region in Brazil. The specimens were sampled in Borba and Manaus, Amazonas State, and in Rio Branco, Acre State. They were analyzed using Giemsa, silver staining, C-banding and FISH with rDNA probes. The karyotypes of the three populations revealed 2n = 34 chromosomes, but they differed in the number and position o...