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The evolution of herbivory is correlated with cold climates in liolaemid lizards. Results are based on a regression of phylogenetically independent contrasts (46) of the gross proportion of plant matter in the diet of each species and an index of the environmental temperature for each species. Contrasts were calculated by using the phylogeny in Fig. 1 for a sample of 75 species for which data on diet and ND2 sequences (for estimating branch lengths) were available.
