Scatterplot of relative femoral gland length (FGL/SVL ratio) and the relative distance between the inner edges of the femoral glands (FGD/SVL) in the two new species from Mayotte and their sister taxon Blommersia wittei from Madagascar. Measurements are based on Table 1; and for B. wittei on Vences et al. (2010) and Pabijan et al. (2011). Note the intermediate position of B. wittei between B. transmarina and B. nataliae sp. nov.