Open AccessCytogenetics of two Species of Paratelmatobius (Anura: Leptodactylidae), with Phylogenetic Comments
Author(s) -
Lourenço Luciana B.,
Garcia Paulo C. A.,
ReccoPimentel Shirlei M.
Publication year - 2001
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.2000.00201.x
Subject(s) - karyotype , biology , ploidy , chromosome , heterochromatin , cytogenetics , zoology , genetics , evolutionary biology , phylogenetic tree , gene
In this paper we provide a cytogenetic analysis of Paratelmatobius cardosoi and Paratelmatobius poecilogaster. The karyotypes of both species showed a diploid number of 24 chromosomes and shared some similarity in the morphology of some pairs. On the other hand, pairs 4 and 6 widely differed between these complements. These karyotypes also differed in their NOR number and location. Size heteromorphism was seen in all NOR‐bearing chromosomes of the two karyotypes. In addition, both karyotypes showed small centromeric C‐bands and a conspicuous heterochromatic band in the short arm of chromosome 1, although with a different size in each species. The P. cardosoi complement also showed other strongly stained non‐centromeric C‐bands, with no counterparts in the P. cardosoi karyotype. Chromosome staining with fluorochromes revealed heterogeneity in the base composition of two of the non‐centromeric C‐bands of P. cardosoi. Comparison of the chromosomal morphology of these Paratelmatobius karyotypes with that of P. lutzii showed that the P. poecilogaster karyotype is more similar to that of P. lutzii than P. cardosoi. These cytogenetic results agree with the proposed species arrangements in the P. cardosoi and P. lutzii groups based on morphological and ecological data.