The Herpetological Journal
The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.
ISSN 0268-0130
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pdf 06. Sexual dimorphism and interspecific head variation in the Liolaemus melanops complex (Squamata: Liolaemini) based on geometric morphometrics
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Open Access
pp. 225-235
Authors: Ignacio Minoli, M. Morando & Luciano J. Avila
Abstract: By analysing size and shape separately, geometric morphometric methods (GM) are a powerful tool to evaluate morphological differences within and between taxa. In this work, we used GM to investigate whether lizards of the Liolaemus melanops complex differ in shape and size. Specifically, we analysed head shape and size variation to quantify intraspecific sexual dimorphism and interspecific differences. We found sexual dimorphism in six of the seven investigated species (L. canqueli, L. dumerili, L. goetschi, L. martorii, L. melanops and L. morenoi). Five species (L. canqueli, L. casamiquelai, L. martorii, L. melanops and L. morenoi) were distinct in shape and size, whereas L. goetschi and L. dumerili were indiscernible from each other. This work illustrates the value of GM to study morphological variation in lizards, suggesting that similar studies would be valuable for testing species boundaries in other groups of Liolaemus.
Key words: Lizards, Liolaemus, morphological diversity, species' boundaries
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