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Boxplots for snout-vent length (SVL; left) and the ratio tympanum diameter/snout-vent length (TD/SVL; right). The line in the middle of the box represents the median, and the lower and upper ends of the box are the 25% and 75% quartiles respectively. Each individual is shown with a symbol; the cross in Osteocephalus buckleyi represents the lectotype. Letters correspond to those of clades on Figure 1.
