Chromosomal evolution in allopatric populations of the <i>Odontophrynus occidentalis</i> group (Amphibia, Anura) from western Argentina

A karyological study of some populations of the <i>Odontophrynus occidentalis</i> group (2n=22) from Argentina is reported. Ammoniacal silver (Ag-AS) and alkaline Giemsa (CBG) staining have been performed on specimens from La Rioja, Mendoza, Malargue, Tamelen, Tapiluque, Valcheta, and Me...

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Autores principales: Ruiz, Itamar Romano García, Cei, José Miguel Alfredo María, Beçak, Willy
Formato: Articulo
Lenguaje:Inglés
Publicado: 1982
Materias:
Zoología
Odontophrynus occidentalis
Chromosomal evolution
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87422
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87422
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Odontophrynus occidentalis
Chromosomal evolution
spellingShingle Zoología
Odontophrynus occidentalis
Chromosomal evolution
Ruiz, Itamar Romano García
Cei, José Miguel Alfredo María
Beçak, Willy
Chromosomal evolution in allopatric populations of the <i>Odontophrynus occidentalis</i> group (Amphibia, Anura) from western Argentina
topic_facet Zoología
Odontophrynus occidentalis
Chromosomal evolution
description A karyological study of some populations of the <i>Odontophrynus occidentalis</i> group (2n=22) from Argentina is reported. Ammoniacal silver (Ag-AS) and alkaline Giemsa (CBG) staining have been performed on specimens from La Rioja, Mendoza, Malargue, Tamelen, Tapiluque, Valcheta, and Meseta de Somuncura. All populations showed active ribosomal cistrons (NORs) on chromosome 11. Some metaphases of three specimens from Mendoza and five from La Rioja also showed bands on 9. Centromeric and telomeric C-bands were common to all populations, and a block of heterochromatin on both sides of the centromere of 2 was remarkable in all but the La Rioja populations. The specimens from La Rioja showed a similar block of heterochromatin on the short arm of 1. Taxonomic studies of several specimens from these localities revealed differences in larval development, glandular pattern, the size of specimens, etc. As a whole, biological as well as karyological features suggest that the isolated population at La Rioja is a separate entity, at the species level, as described elsewhere.
format Articulo
Articulo
author Ruiz, Itamar Romano García
Cei, José Miguel Alfredo María
Beçak, Willy
author_facet Ruiz, Itamar Romano García
Cei, José Miguel Alfredo María
Beçak, Willy
author_sort Ruiz, Itamar Romano García
title Chromosomal evolution in allopatric populations of the <i>Odontophrynus occidentalis</i> group (Amphibia, Anura) from western Argentina
title_short Chromosomal evolution in allopatric populations of the <i>Odontophrynus occidentalis</i> group (Amphibia, Anura) from western Argentina
title_full Chromosomal evolution in allopatric populations of the <i>Odontophrynus occidentalis</i> group (Amphibia, Anura) from western Argentina
title_fullStr Chromosomal evolution in allopatric populations of the <i>Odontophrynus occidentalis</i> group (Amphibia, Anura) from western Argentina
title_full_unstemmed Chromosomal evolution in allopatric populations of the <i>Odontophrynus occidentalis</i> group (Amphibia, Anura) from western Argentina
title_sort chromosomal evolution in allopatric populations of the <i>odontophrynus occidentalis</i> group (amphibia, anura) from western argentina
publishDate 1982
url http://sedici.unlp.edu.ar/handle/10915/87422
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