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Abstract:

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.

Registro:

Documento: Artículo
Título:Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach
Autor:Tiranti, S.I.; Dyzenchauz, F.J.; Hasson, E.R.; Massarini, A.I.
Filiación:Fac. de Ciencias Exactas Y Naturales, Universidad Nacional de La Pampa, Uruguay 151, 6300, Santa Rosa, La Pampa, Argentina
Fund. Pablo Cassara Saladillo 2452, C1440FFX Buenos Aires, Argentina
GIBE, Dpto. de Ciencias Biológicas, Cdad. Universitaria, Nuñez, 1428 Buenos Aires, Argentina
Palabras clave: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
Año:2005
Volumen:69
Número:1
Página de inicio:69
Página de fin:80
DOI: http://dx.doi.org/10.1515/mamm.2005.006
Título revista:Mammalia
Título revista abreviado:Mammalia
ISSN:00251461
CODEN:MAMLA
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00251461_v69_n1_p69_Tiranti.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v69_n1_p69_Tiranti

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Citas:

---------- APA ----------
Tiranti, S.I., Dyzenchauz, F.J., Hasson, E.R. & Massarini, A.I. (2005) . Evolutionary and systematic relationships among tuco-tucos of the Ctenomys pundti complex (Rodentia: Octodontidae): A cytogenetic and morphological approach. Mammalia, 69(1), 69-80.
http://dx.doi.org/10.1515/mamm.2005.006
---------- CHICAGO ----------
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" . Mammalia 69, no. 1 (2005) : 69-80.
http://dx.doi.org/10.1515/mamm.2005.006
---------- MLA ----------
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" . Mammalia, vol. 69, no. 1, 2005, pp. 69-80.
http://dx.doi.org/10.1515/mamm.2005.006
---------- VANCOUVER ----------
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. Mammalia. 2005;69(1):69-80.
http://dx.doi.org/10.1515/mamm.2005.006