Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach

We present new cytogenetic, morphometric, and sperm morphology data of eight populations belonging to the C. pundti complex from Southern Córdoba and Eastern La Pampa Provinces in Argentina. The diploid numbers ranged from 2n = 44 to 2n = 50, and C- bands revealed a pattern of centromeric and perice...

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Autores principales: Hasson, Esteban Ruben, Massarini, Alicia Isabel
Publicado: 2005
Materias:
Ctenomys
Cytogenetics
Evolutionary relationships
Morphometric
Systematics
cytogenetics
morphology
rodent
taxonomy
Argentina
Cordoba [Argentina]
La Pampa
South America
Western Hemisphere
World
Anisotremus taeniatus
Ctenomyidae
Ctenomys pundti
Lama guanicoe
Octodontidae
Rodentia
Vicugna vicugna
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v69_n1_p69_Tiranti
http://hdl.handle.net/20.500.12110/paper_00251461_v69_n1_p69_Tiranti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00251461_v69_n1_p69_Tiranti
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spelling paper:paper_00251461_v69_n1_p69_Tiranti2023-06-08T14:52:41Z Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach Hasson, Esteban Ruben Massarini, Alicia Isabel Ctenomys Cytogenetics Evolutionary relationships Morphometric Systematics cytogenetics morphology rodent taxonomy Argentina Cordoba [Argentina] La Pampa South America Western Hemisphere World Anisotremus taeniatus Ctenomyidae Ctenomys Ctenomys pundti Lama guanicoe Octodontidae Rodentia Vicugna vicugna We present new cytogenetic, morphometric, and sperm morphology data of eight populations belonging to the C. pundti complex from Southern Córdoba and Eastern La Pampa Provinces in Argentina. The diploid numbers ranged from 2n = 44 to 2n = 50, and C- bands revealed a pattern of centromeric and pericentromeric heterochromatin. Comparisons of G-banded karyotypes revealed that the 2n = 44 (Holmberg, Santa Catalina, Sampacho), 2n = 46 (Realicó), 2n = 48 (El Guanaco, Guatraché), 2n = 46-48 (Vicuña Mackenna), and 2n = 50 (Puente Olmos) karyotypes, are closely related. In addition, these karyotypes show a high degree of homology (95%) with C. talarum talarum, despite the fact that five chromosomal rearrangements differentiate both taxa. Discriminant Function Analysis of morphometric data allows to distinguish three clusters: i) the C. mendocinus species group, ii) C. t. talarum, and iii) populations of the C. pundti complex proposed herein. The close phylogenetic relationship between C. talarum and the C. pundti complex, which undoubtedly belong to the same evolutionary lineage, is well supported by two different kinds of evidence: the extensive chromosomal homology and the same symmetric type of sperm. The morphological and chromosomal differences show that these two forms have diverged recently. © Publications Scientifiques du Muséum national d'Histoire naturelle. Fil:Hasson, E.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Massarini, A.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v69_n1_p69_Tiranti http://hdl.handle.net/20.500.12110/paper_00251461_v69_n1_p69_Tiranti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Ctenomys
Cytogenetics
Evolutionary relationships
Morphometric
Systematics
cytogenetics
morphology
rodent
taxonomy
Argentina
Cordoba [Argentina]
La Pampa
South America
Western Hemisphere
World
Anisotremus taeniatus
Ctenomyidae
Ctenomys
Ctenomys pundti
Lama guanicoe
Octodontidae
Rodentia
Vicugna vicugna
spellingShingle Ctenomys
Cytogenetics
Evolutionary relationships
Morphometric
Systematics
cytogenetics
morphology
rodent
taxonomy
Argentina
Cordoba [Argentina]
La Pampa
South America
Western Hemisphere
World
Anisotremus taeniatus
Ctenomyidae
Ctenomys
Ctenomys pundti
Lama guanicoe
Octodontidae
Rodentia
Vicugna vicugna
Hasson, Esteban Ruben
Massarini, Alicia Isabel
Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach
topic_facet Ctenomys
Cytogenetics
Evolutionary relationships
Morphometric
Systematics
cytogenetics
morphology
rodent
taxonomy
Argentina
Cordoba [Argentina]
La Pampa
South America
Western Hemisphere
World
Anisotremus taeniatus
Ctenomyidae
Ctenomys
Ctenomys pundti
Lama guanicoe
Octodontidae
Rodentia
Vicugna vicugna
description We present new cytogenetic, morphometric, and sperm morphology data of eight populations belonging to the C. pundti complex from Southern Córdoba and Eastern La Pampa Provinces in Argentina. The diploid numbers ranged from 2n = 44 to 2n = 50, and C- bands revealed a pattern of centromeric and pericentromeric heterochromatin. Comparisons of G-banded karyotypes revealed that the 2n = 44 (Holmberg, Santa Catalina, Sampacho), 2n = 46 (Realicó), 2n = 48 (El Guanaco, Guatraché), 2n = 46-48 (Vicuña Mackenna), and 2n = 50 (Puente Olmos) karyotypes, are closely related. In addition, these karyotypes show a high degree of homology (95%) with C. talarum talarum, despite the fact that five chromosomal rearrangements differentiate both taxa. Discriminant Function Analysis of morphometric data allows to distinguish three clusters: i) the C. mendocinus species group, ii) C. t. talarum, and iii) populations of the C. pundti complex proposed herein. The close phylogenetic relationship between C. talarum and the C. pundti complex, which undoubtedly belong to the same evolutionary lineage, is well supported by two different kinds of evidence: the extensive chromosomal homology and the same symmetric type of sperm. The morphological and chromosomal differences show that these two forms have diverged recently. © Publications Scientifiques du Muséum national d'Histoire naturelle.
author Hasson, Esteban Ruben
Massarini, Alicia Isabel
author_facet Hasson, Esteban Ruben
Massarini, Alicia Isabel
author_sort Hasson, Esteban Ruben
title Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach
title_short Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach
title_full Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach
title_fullStr Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach
title_full_unstemmed Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach
title_sort evolutionary and systematic relationships among tuco-tucos of the ctenomys pundti complex (rodentia: octodontidae): a cytogenetic and morphological approach
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v69_n1_p69_Tiranti
http://hdl.handle.net/20.500.12110/paper_00251461_v69_n1_p69_Tiranti
work_keys_str_mv AT hassonestebanruben evolutionaryandsystematicrelationshipsamongtucotucosofthectenomyspundticomplexrodentiaoctodontidaeacytogeneticandmorphologicalapproach
AT massarinialiciaisabel evolutionaryandsystematicrelationshipsamongtucotucosofthectenomyspundticomplexrodentiaoctodontidaeacytogeneticandmorphologicalapproach
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