Cytogenetics of the Brazilian whiptail lizard Cnemidophorus littoralis (Teiidae) from a restinga area (Barra de Maricá) in Southeastern Brazil

Brazilian Journal of Biology

D. Peccinini-seale²  C. F. D. Rocha¹  T. M. B. Almeida¹  A. F. B. Araújo¹  M. A. De Sena² 

[1] ,Universidade de São Paulo Instituto de Biociências São Paulo SP ,Brazil

关键词: restinga;    lizards;    karyotype;    sex chromosomes;    restinga;    lagartos;    cariótipo;    cromossomos sexuais;    espécie endêmica;   

DOI  :  10.1590/S1519-69842004000400014

来源: SciELO

【 摘 要 】

Chromosomes of Cnemidophorus littoralis, a new species of teiid lizard recently described, were studied. The animals are from a restinga area in Barra de Maricá, RJ. The karyotype presents a diploid number of 2n = 46 chromosomes and a chromosomal sex determination mechanism of the type XX:XY. Nucleolar organizer regions, Ag-NORs, are at the sixth pair of chromosomes; there is variability of size and number of the Ag-stained nucleoli on the 50 interphase nuclei for each specimen analyzed. These nucleoli are related to NOR patterns that also demonstrated variability in size and number. This paper presents the first description of the karyotype of Cnemidophorus littoralis and of a chromosomal sex determination mechanism of the XX:XY type in the genus Cnemidophorus from Southeastern Brazil.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License