A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843

The gemís Diplolaemus Bell, 1843 is a common squamate component of the Patagonian región of South América. Considerable taxonomic confusión exists within this gemís, particularly about the status of Chilean-Andean populations and the actual distribution of D. leopardinas (Werner, 1898). In an attemp...

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Autores principales:	Victoriano,Pedro F, Coronado,Tanía M, Ortiz,Juan Carlos
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2010
Materias:	Species limits taxonomy Patagonia Polychrotidae
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000100006
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spelling	oai:scielo:S0717-653820100001000062010-08-09A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843Victoriano,Pedro FCoronado,Tanía MOrtiz,Juan Carlos Species limits taxonomy Patagonia Polychrotidae The gemís Diplolaemus Bell, 1843 is a common squamate component of the Patagonian región of South América. Considerable taxonomic confusión exists within this gemís, particularly about the status of Chilean-Andean populations and the actual distribution of D. leopardinas (Werner, 1898). In an attempt to clarify the taxonomic status and distribution of Diplolaemus species, we performed a principal component analysis (PCA) and discriminant function analysis (DFA) using both standard morphometric and meristic data. Multivariate summaries of morphometric data show that most species are poorly discriminated, with the exception of D. darwinii. In contrast, a PCA analyses performed on the meristic data clearly distinguish three discrete groups: 1. D. darwinii, 2. D. sexcinctus including the Chilean populations, and 3. populations from Mendoza, Argentina, including the holotype of D. leopardinus and of D. bibronii. A DFA consistently assigned with a high percentage of successful classifcation (95%) individuals of the species D. darwinii, D. sexcinctus, and D. bibronii. The group with lowest successful rate in the cross validation procedure (78%) was D. leopardinus (including populations from Mendoza), with misidentifcations assigned only to D. bibronii. The group formed by Mendoza populations and the holotype of D. leopardinus is visibly distinct from remaining D. bibronii in colour patterns. The holotype of D. leopardinus is clearly differentiated from the Chilean-Andean populations. Our results support the assignment of populations from Mendoza to D. leopardinus, and suggest that the Chilean-Andean populations currently assigned to this taxon should be referred as D. sexcinctus, together with populations from the Argentinean provinces of Río Negro and Neuquén.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.74 n.1 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000100006en10.4067/S0717-65382010000100006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Species limits taxonomy Patagonia Polychrotidae
spellingShingle	Species limits taxonomy Patagonia Polychrotidae Victoriano,Pedro F Coronado,Tanía M Ortiz,Juan Carlos A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843
description	The gemís Diplolaemus Bell, 1843 is a common squamate component of the Patagonian región of South América. Considerable taxonomic confusión exists within this gemís, particularly about the status of Chilean-Andean populations and the actual distribution of D. leopardinas (Werner, 1898). In an attempt to clarify the taxonomic status and distribution of Diplolaemus species, we performed a principal component analysis (PCA) and discriminant function analysis (DFA) using both standard morphometric and meristic data. Multivariate summaries of morphometric data show that most species are poorly discriminated, with the exception of D. darwinii. In contrast, a PCA analyses performed on the meristic data clearly distinguish three discrete groups: 1. D. darwinii, 2. D. sexcinctus including the Chilean populations, and 3. populations from Mendoza, Argentina, including the holotype of D. leopardinus and of D. bibronii. A DFA consistently assigned with a high percentage of successful classifcation (95%) individuals of the species D. darwinii, D. sexcinctus, and D. bibronii. The group with lowest successful rate in the cross validation procedure (78%) was D. leopardinus (including populations from Mendoza), with misidentifcations assigned only to D. bibronii. The group formed by Mendoza populations and the holotype of D. leopardinus is visibly distinct from remaining D. bibronii in colour patterns. The holotype of D. leopardinus is clearly differentiated from the Chilean-Andean populations. Our results support the assignment of populations from Mendoza to D. leopardinus, and suggest that the Chilean-Andean populations currently assigned to this taxon should be referred as D. sexcinctus, together with populations from the Argentinean provinces of Río Negro and Neuquén.
author	Victoriano,Pedro F Coronado,Tanía M Ortiz,Juan Carlos
author_facet	Victoriano,Pedro F Coronado,Tanía M Ortiz,Juan Carlos
author_sort	Victoriano,Pedro F
title	A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843
title_short	A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843
title_full	A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843
title_fullStr	A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843
title_full_unstemmed	A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843
title_sort	multivariate analysis of taxonomic limits in diplolaemus bell 1843
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000100006
work_keys_str_mv	AT victorianopedrof amultivariateanalysisoftaxonomiclimitsindiplolaemusbell1843 AT coronadotaniam amultivariateanalysisoftaxonomiclimitsindiplolaemusbell1843 AT ortizjuancarlos amultivariateanalysisoftaxonomiclimitsindiplolaemusbell1843 AT victorianopedrof multivariateanalysisoftaxonomiclimitsindiplolaemusbell1843 AT coronadotaniam multivariateanalysisoftaxonomiclimitsindiplolaemusbell1843 AT ortizjuancarlos multivariateanalysisoftaxonomiclimitsindiplolaemusbell1843
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A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843

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