The complete mitochondrial genome of <i>Salamandra salamandra</i> (Amphibia: Urodela: Salamandridae)

Mulder, Kevin P.; Lourenço, André; Carneiro, Miguel; Velo‐Antón, Guillermo

doi:10.1080/23802359.2016.1253042

Cited by 2 publications

(1 citation statement)

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“…Furthermore, by applying the novel procedure described herein we could identify differences in shape between populations, as well as variation in the degree of sexual dimorphism between them, despite the fact that the populations belong to the same lineage (Velo‐Antón et al, ; Mulder et al, ). Several morphological studies in S. salamandra have addressed differences at the intraspecific level to aid the description of subspecies (Bosch and López‐Bueis, ; Alcobendas et al, ; García‐París et al, ), but diversity within subspecies has not been as widely explored (but see Cordero‐Rivera et al, ; Beukema et al, ).…”

Section: Discussionmentioning

confidence: 99%

A non-invasive geometric morphometrics method for exploring variation in dorsal head shape in urodeles: sexual dimorphism and geographic variation inSalamandra salamandra

Alarcón-Ríos

Velo‐Antón

Kaliontzopoulou

2017

Journal of Morphology

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The study of morphological variation among and within taxa can shed light on the evolution of phenotypic diversification. In the case of urodeles, the dorso-ventral view of the head captures most of the ontogenetic and evolutionary variation of the entire head, which is a structure with a high potential for being a target of selection due to its relevance in ecological and social functions. Here, we describe a non-invasive procedure of geometric morphometrics for exploring morphological variation in the external dorso-ventral view of urodeles' head. To explore the accuracy of the method and its potential for describing morphological patterns we applied it to two populations of Salamandra salamandra gallaica from NW Iberia. Using landmark-based geometric morphometrics, we detected differences in head shape between populations and sexes, and an allometric relationship between shape and size. We also determined that not all differences in head shape are due to size variation, suggesting intrinsic shape differences across sexes and populations. These morphological patterns had not been previously explored in S. salamandra, despite the high levels of intraspecific diversity within this species. The methodological procedure presented here allows to detect shape variation at a very fine scale, and solves the drawbacks of using cranial samples, thus increasing the possibilities of using collection specimens and alive animals for exploring dorsal head shape variation and its evolutionary and ecological implications in urodeles. J. Morphol. 278:475-485, 2017. © 2017 Wiley Periodicals, Inc.

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