Despite the growing number of studies describing digit ratio patterns in tetrapods, knowledgeconcerning certain basic issues is still scarce. In lower vertebrates such as tailless amphibians (Anura), thenumbering of individual fingers on the forelimbs and their homology with the fingers of other vertebrates pose anunsolved problem. Based on reviewed data on anuran limb development, we argue that the correct fingernumbering scheme should be based on the assumption that the first finger, not the fifth finger, was reduced onthe forelimbs. We analyzed the digit ratio in the common toad (Bufo bufo, Bufonidae), a species characterized bywell-developed sexual dimorphism whereby females are larger than males, using both numbering schemes presentin the literature.Results:We found that the digit ratio on hindlimbs differed significantly between the sexes only in the cases of left2D:3D, with lower digit ratios in females, and of left 3D:4D, with lower digit ratios in males. We found that sex wasthe only significant variable for forelimbs, differentiating 2D:3D on the left forelimb, with lower digit ratios infemales; 2D:4D on the right forelimb, with lower digit ratios in males; and 3D:4D on both forelimbs, with lower digitratios in males. These results relate to variant II reflecting the hypothesis that the first digit was reduced duringphylogenesis. There was no relationship between the body size (SVL) of individuals and any digit ratio, excluding2D:4D on the right forelimbs in models with age variables. Additionally, for a subset of data where individual agewas known, the models indicated that age was linked to significant differences in 2D:4D and 3D:4D on the lefthindlimbs, while age, SVL, and sex influenced 2D:4D on the right forelimbs.Conclusion:We emphasize the importance of the problem of the correct numbering of forelimb digits in Anuraand, under the assumption that it was the fifth digit that was reduced, argue that earlier results on digit ratio in thisgroup should be interpreted with caution. The detected relationship between digit ratio and age in amphibiansexpands our knowledge, indicating that the age of individuals should be included in future digit ratio studies. Thisrelationship may also apply to studies using digit ratio as a noninvasive indicator of endocrine disruption inamphibians.