2017
DOI: 10.1002/jmor.20643
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A non-invasive geometric morphometrics method for exploring variation in dorsal head shape in urodeles: sexual dimorphism and geographic variation inSalamandra salamandra

Abstract: 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 extern… Show more

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Cited by 15 publications
(7 citation statements)
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References 71 publications
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“…The sexes can also be dissimilar in ways other than overall body size: divergence in body shape is also possible, and quite common. However, research on sexual shape dimorphism (SShD) is much scarcer than on SSD (e.g., Alarcón‐Ríos, Velo‐Antón, & Kaliontzopoulou, ; Gidaszewski, Baylac, & Klingenberg, ; Ivanović, Sotiropoulos, Furtula, Džukić, & Kalezić, ; Schwarzkopf, ). As cryptic intersexual differences in shape or body proportions are not captured if only body length is analyzed (Reinhard, Renner, & Kupfer, ; Schwarzkopf, ) SShD is only detectable by multivariate morphometrics (e.g., Malmgren & Thollesson, ; Reinhard & Kupfer, ).…”
Section: Introductionmentioning
confidence: 99%
“…The sexes can also be dissimilar in ways other than overall body size: divergence in body shape is also possible, and quite common. However, research on sexual shape dimorphism (SShD) is much scarcer than on SSD (e.g., Alarcón‐Ríos, Velo‐Antón, & Kaliontzopoulou, ; Gidaszewski, Baylac, & Klingenberg, ; Ivanović, Sotiropoulos, Furtula, Džukić, & Kalezić, ; Schwarzkopf, ). As cryptic intersexual differences in shape or body proportions are not captured if only body length is analyzed (Reinhard, Renner, & Kupfer, ; Schwarzkopf, ) SShD is only detectable by multivariate morphometrics (e.g., Malmgren & Thollesson, ; Reinhard & Kupfer, ).…”
Section: Introductionmentioning
confidence: 99%
“…Sexual shape dimorphisms in the cranium of other newts and salamanders comprise differences in vomer length, quadrate position, occipital region size, skull width and snout shape (Ivanović et al, 2008, Alarcón-Rios et al, 2017. These shape changes were also present in crocodile newts, but they additionally differ in the extent of the squamosal bone.…”
Section: Discussionmentioning
confidence: 99%
“…These difficulties are clearly amplified in studies of wild subjects displaying their normal behavior in natural conditions (Sonnweber et al., ). Indeed, previous applications to soft tissues of live non‐human animals, such as the one by Alarcón‐Ríos, Velo‐Antón, and Kaliontzopoulou (), were typically using captured and/or sedated individuals.…”
Section: Discussionmentioning
confidence: 99%