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—The sensitivity of nine test statistics for assessing the adequacy of the GTR + Γ substitution model in simulations with 5,000 nucleotides under six representative simulation conditions (for results from every simulation scenario, see supplementary figs. S4–S6, Supplementary Material online). The Mahalanobis test statistic was calculated to summarize all test statistics (M1), or the four sensitive test statistics (M2). Each box represents the results of 100 replicate analyses.
