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      Digit ratio in three species of tropidurid lizards

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      Herpetozoa

      Pensoft Publishers

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          Abstract

          Proportions between pairs of digits are linked to fitness in tetrapods and they can be influenced by sex hormones through individuals’ ontogenies. Therefore, in many species, the proportions amongst finger length ratios (referred as digit ratio, i.e. 2D second and 4D fourth digits) can differ between males and females. We investigated whether the three most commonly used forelimb digit ratios are sexually dimorphic in three tropidurid species. In one of the three lizard species, Eurolophosaurus nanuzae, males and females differ for only 2D:4D digit ratio. Otherwise, our results on the studied Tropidurus species conform to previous studies showing no differences in digit ratios between males and females. Hence, it might be the case of local selective forces shaping interpopulation variation in the expression of sexual dimorphism for digit ratio.

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          Journal
          Herpetozoa
          Herpetozoa
          Pensoft Publishers
          2682-955X
          1013-4425
          March 09 2021
          March 09 2021
          : 34
          : 67-70
          Article
          10.3897/herpetozoa.34.e59064
          © 2021

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