Karyotypes of four species of Xenodontini snakes (Serpentes) and implications for taxonomy

The karyotypes of four South American Xenodontini snake species, Lygophis dilepis, L. meridionalis, L. flavifrenatus and L. anomalus, are here described for the first time. We studied specimens from northeastern Argentina using conventional and silver (Ag-NOR) staining. While the typical ophidian ka...

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Autores principales: Falcione, Ana Camila, Hernando, Alejandra Beatriz, Barrasso, Diego Andrés, Di Pietro, Diego Omar
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Zoología
Karyosystematics
Lygophis
Variability
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/99867
https://ri.conicet.gov.ar/11336/31539
https://brill.com/view/journals/ctoz/85/3/article-p265_1.xml?language=en
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-99867
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Karyosystematics
Lygophis
Variability
spellingShingle Zoología
Karyosystematics
Lygophis
Variability
Falcione, Ana Camila
Hernando, Alejandra Beatriz
Barrasso, Diego Andrés
Di Pietro, Diego Omar
Karyotypes of four species of Xenodontini snakes (Serpentes) and implications for taxonomy
topic_facet Zoología
Karyosystematics
Lygophis
Variability
description The karyotypes of four South American Xenodontini snake species, Lygophis dilepis, L. meridionalis, L. flavifrenatus and L. anomalus, are here described for the first time. We studied specimens from northeastern Argentina using conventional and silver (Ag-NOR) staining. While the typical ophidian karyotype is 2n= 36, we found that the karyotype of the studied species is 2n=34, with metacentric and submetacentric chromosome pairs. The Ag-NOR staining revealed that nucleolar organizer regions (NORs) are located on one pair of microchromosomes. In L. dilepisand L. anomalus the 4th chromosome pair is heteromorphic, and we suggest that it might be considered as the ZW sex chromosome pair. The optimization of available karyological data on a molecular phylogenetic tree of the tribe Xenodontini shows that the diploid numbers of the three genera (2n= 28, 30 and 34) represent putative synapomorphies for Erythrolamprus, Xenodon and Lygophis, respectively. Our results provide new insights which fill gaps in our knowledge on the cytology in the genus Lygophis and identified a possible diagnostic character for the genus.
format Articulo
Articulo
author Falcione, Ana Camila
Hernando, Alejandra Beatriz
Barrasso, Diego Andrés
Di Pietro, Diego Omar
author_facet Falcione, Ana Camila
Hernando, Alejandra Beatriz
Barrasso, Diego Andrés
Di Pietro, Diego Omar
author_sort Falcione, Ana Camila
title Karyotypes of four species of Xenodontini snakes (Serpentes) and implications for taxonomy
title_short Karyotypes of four species of Xenodontini snakes (Serpentes) and implications for taxonomy
title_full Karyotypes of four species of Xenodontini snakes (Serpentes) and implications for taxonomy
title_fullStr Karyotypes of four species of Xenodontini snakes (Serpentes) and implications for taxonomy
title_full_unstemmed Karyotypes of four species of Xenodontini snakes (Serpentes) and implications for taxonomy
title_sort karyotypes of four species of xenodontini snakes (serpentes) and implications for taxonomy
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/99867
https://ri.conicet.gov.ar/11336/31539
https://brill.com/view/journals/ctoz/85/3/article-p265_1.xml?language=en
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