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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todo:paper_00251461_v69_n1_p69_Tiranti2023-10-03T14:35:31Z Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach Tiranti, S.I. Dyzenchauz, F.J. Hasson, E.R. Massarini, A.I. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00251461_v69_n1_p69_Tiranti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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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 Tiranti, S.I. Dyzenchauz, F.J. Hasson, E.R. Massarini, A.I. 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. |
| format |
JOUR |
| author |
Tiranti, S.I. Dyzenchauz, F.J. Hasson, E.R. Massarini, A.I. |
| author_facet |
Tiranti, S.I. Dyzenchauz, F.J. Hasson, E.R. Massarini, A.I. |
| author_sort |
Tiranti, S.I. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_00251461_v69_n1_p69_Tiranti |
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