Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae)

A morphometric analysis on the skull of five populations of Ctenomys talarum was performed; these populations represent the three subspecies recognized for this species of tuco-tuco (i.e. C. t. talarum, C. t. recesus y C. t. occidentalis). We analyzed the skull geographic variation and the sexual di...

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Autores principales: García Esponda, C.M., Moreira, G.J., Justo, E.R., de Santis, L.J.M.
Formato: JOUR
Lenguaje:Spanish
Materias:
Argentina
Craniometry
Ctenomys talarum
Geographic variation
Sexual dimorphism
Ctenomyidae
Ctenomys
Rodentia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03279383_v16_n1_p_GarciaEsponda
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03279383_v16_n1_p_GarciaEsponda
record_format dspace
spelling todo:paper_03279383_v16_n1_p_GarciaEsponda2023-10-03T15:25:00Z Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae) García Esponda, C.M. Moreira, G.J. Justo, E.R. de Santis, L.J.M. Argentina Craniometry Ctenomys talarum Geographic variation Sexual dimorphism Ctenomyidae Ctenomys Ctenomys talarum Rodentia A morphometric analysis on the skull of five populations of Ctenomys talarum was performed; these populations represent the three subspecies recognized for this species of tuco-tuco (i.e. C. t. talarum, C. t. recesus y C. t. occidentalis). We analyzed the skull geographic variation and the sexual dimorphism. When studying the geographic variation, two types of discriminant analyses were performed: one from the raw data and another from scale-corrected data, after a method that removes the information related to size was applied. We observed a significant sexual dimorphism in C. talarum; in conse-quence analyses of geographic variation were conducted separately in males and females. Results from these analyses showed significant differences between populations that were mainly due to the overall size of the skull, both in males and females. After influence of size was removed, differences between populations (due to shape differences on the skull) were less significant. Likewise, the geographic craniometric variation observed was not in agreement with the three nominal species of C. talarum, therefore, these results do not support their recognition. In the genus Ctenomys, size is assumed to be a very important evolutive character, both at the intraspecific as well as the interspecific levels. © SAREM, 2009. JOUR Spanish info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03279383_v16_n1_p_GarciaEsponda
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Spanish
orig_language_str_mv Spanish
topic Argentina
Craniometry
Ctenomys talarum
Geographic variation
Sexual dimorphism
Ctenomyidae
Ctenomys
Ctenomys talarum
Rodentia
spellingShingle Argentina
Craniometry
Ctenomys talarum
Geographic variation
Sexual dimorphism
Ctenomyidae
Ctenomys
Ctenomys talarum
Rodentia
García Esponda, C.M.
Moreira, G.J.
Justo, E.R.
de Santis, L.J.M.
Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae)
topic_facet Argentina
Craniometry
Ctenomys talarum
Geographic variation
Sexual dimorphism
Ctenomyidae
Ctenomys
Ctenomys talarum
Rodentia
description A morphometric analysis on the skull of five populations of Ctenomys talarum was performed; these populations represent the three subspecies recognized for this species of tuco-tuco (i.e. C. t. talarum, C. t. recesus y C. t. occidentalis). We analyzed the skull geographic variation and the sexual dimorphism. When studying the geographic variation, two types of discriminant analyses were performed: one from the raw data and another from scale-corrected data, after a method that removes the information related to size was applied. We observed a significant sexual dimorphism in C. talarum; in conse-quence analyses of geographic variation were conducted separately in males and females. Results from these analyses showed significant differences between populations that were mainly due to the overall size of the skull, both in males and females. After influence of size was removed, differences between populations (due to shape differences on the skull) were less significant. Likewise, the geographic craniometric variation observed was not in agreement with the three nominal species of C. talarum, therefore, these results do not support their recognition. In the genus Ctenomys, size is assumed to be a very important evolutive character, both at the intraspecific as well as the interspecific levels. © SAREM, 2009.
format JOUR
author García Esponda, C.M.
Moreira, G.J.
Justo, E.R.
de Santis, L.J.M.
author_facet García Esponda, C.M.
Moreira, G.J.
Justo, E.R.
de Santis, L.J.M.
author_sort García Esponda, C.M.
title Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae)
title_short Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae)
title_full Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae)
title_fullStr Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae)
title_full_unstemmed Analysis of craniometric variation in Ctenomys talarum (Rodentia, Ctenomyidae)
title_sort analysis of craniometric variation in ctenomys talarum (rodentia, ctenomyidae)
url http://hdl.handle.net/20.500.12110/paper_03279383_v16_n1_p_GarciaEsponda
work_keys_str_mv AT garciaespondacm analysisofcraniometricvariationinctenomystalarumrodentiactenomyidae
AT moreiragj analysisofcraniometricvariationinctenomystalarumrodentiactenomyidae
AT justoer analysisofcraniometricvariationinctenomystalarumrodentiactenomyidae
AT desantisljm analysisofcraniometricvariationinctenomystalarumrodentiactenomyidae
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