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Dryad

Morphometric data to describe phenotypical variation across Pygmy and Marbled newts (genus Triturus)

Data files

Abstract

An extensive dataset on the external morphology of pygmy and marbled newts was used to explore the static allometry of sexual size dimorphism (SSD) and Rensch’s rule (RR). Females were larger in trunk and head sizes, whereas males had longer limbs and digits. Divergences in trunk and head dimensions between sexes were achieved along a common allometric slope rather than by a change in the slope’s direction, most often through a shift in the intercept. Sexual dimorphism in finger and toe length was unrelated to body size. The change in SSD with a change in body size (RR) was confirmed for female-biased traits. RR was unrelated to changes in static allometric slopes.