The karyotype of adenomera diptyx (boettger 1885) (anura, leptodactylidae) from northeastern Argentina
Fecha
2011Autor
Zaracho, Víctor Hugo
Hernando, Alejandra Beatriz
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In this work we analyzed the karyotype of five populations of Adenomera diptyx from Argentina after conventional
staining, Ag-NOR and C-banding. All specimens presented 2n = 26 and FN = 34. The karyotype was formed by three
submetacentric, one metacentric and nine telocentric pairs. Silver staining revealed that the NOR was located on a
secondary constriction in pair 7. C- banding evidenced constitutive heterochromatin at the pericentromeric region of
all chromosomes. The karyotype of A. diptyx was similar to that of A. hylaedactyla (2n = 26, FN = 34) and different
from that of A. andreae (2n = 26, FN = 40) in the fundamental number and secondary constriction position. It also dif-
fered from the karyotypes of A. marmorata (2n = 24, FN = 34 and 36) and of A. aff. bokermanni (2n = 23, FN = 34) in
diploid number. Until a comprehensive cytogenetic analysis of all the species of the genus is performed, their chro-
mosome evolution will remain poorly understood.
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