TABLE 6 in Body size histories of Shungura Formation reptiles in biotic and abiotic environmental context

Abigail K. Parker; Jean-Renaud Boisserie; Johannes Müller; Christopher A. Brochu; Jason J. Head

doi:10.5281/zenodo.18849504

TABLE 6. — Correlation statistics of reptile and mammal maximum sizes with faunal variables across members of the Shungura Formation. A shows results for pairwise correlation tests between log 10 mass values and B shows results for pairwise correlation tests for the first differences in those values between members, not including results for Trionychidae and Cercopithecidae because the sampled specimens come from too few consecutive members to calculate correlation in their first differences. Each cell contains the Pearson correlation coefficient and p-value for the correlation test. The row and column marked S have non-normally-distributed data, so the correlation test results shown are the Spearman rank correlation coefficient and corresponding p-value. P-values under 0.05 which are not significant after Bonferroni correction are marked with *, p-values which are significant after Bonferroni correction are marked with **, and correlation coefficients over 0.75 are marked in bold. Data from Bobe & Behrensmeyer (2004), Hernández Fernández & Vrba (2006), Levin et al. (2011), and Negash et al. (2020) and Homo Linnaeus, 1758 in the late Pliocene, as constituents of broader pulses of faunal turnover synchronized by episodes of global climatic change. A more recent concept, the variability selection hypothesis, emphasizes the importance of fluctuating climates and environments, rather than any single trend, in shaping human adaptation and evolution. Here we evaluate these ideas for the Plio-Pleistocene in light of new analyses of fossil mammals from the Turkana Basin of Kenya and Ethiopia. Our results show that between 4 and 1 Ma (million years ago). Herbivore δ 13 C (S)Herbivore δ 18 OAAH % (S)Reduncin %Grassland indicator proportionFaunal mean annual precipitationAEuthecodon0.591–0.0540.10.2380.1570.258p = 0.061p = 0.875p = 0.769p = 0.482p = 0.645p = 0.622Crocodylus–0.0770.0480.0610.036–0.038–0.179p = 0.821p = 0.889p = 0.867p = 0.921p = 0.916p = 0.734cf. Mecistops0.0290.1910.086–0.186–0.1370.375p = 1p = 0.717p = 0.919p = 0.724p = 0.796p = 0.755Aquatic turtles–0.619–0.3920.5390.0430.1230.324p = 0.115p = 0.337p = 0.168p = 0.919p = 0.772p = 0.531Trionychidae–0.4–0.6450.40.915–0.0211p = 0.75p = 0.355p = 0.75p = 0.085p = 0.979p = 0.006*Pelomedusidae0.310.857–0.3950.37–0.0270.206p = 0.462p = 0.007*p = 0.332p = 0.367p = 0.949p = 0.695Python0.05–0.1940.05–0.38–0.044–0.23p = 0.912p = 0.617p = 0.898p = 0.313p = 0.911p = 0.66TestudinidaeNA0.55–0.649–0.104–0.4330.085p = 0.201p = 0.115p = 0.824p = 0.332p = 0.891aff. Hip. protamphibiuskarumensis (S)0.4620.350.7430.5330.882–0.543p = 0.134p =0.266p = 0.0089*p = 0.091p = 0.0006*p = 0.297aff. Hip. aethiopicus0.7–0.4920.20.31–0.297NAp = 0.233p = 0.4p = 0.783p = 0.611p = 0.627Hippopotamus sp.–0.10.769–0.10.6960.561NAp = 0.95p = 0.128p = 0.95p = 0.192p = 0.326Equidae–0.2860.305–0.342–0.656–0.780.575p = 0.556p = 0.507p = 0.452p = 0.109p = 0.038*p = 0.232Cercopithecidae–0.0290.9710.628–0.0450.553–0.864p = 1p = 0.001*p = 0.173p = 0.933p = 0.255p = 0.136Bovidae–0.431–0.092–0.237–0.456–0.2470.138p = 0.162p = 0.777p = 0.482p = 0.158p = 0.465p = 0.794Tragelaphini (S)–0.0640.6–0.334–0.286–0.103–0.543p = 0.86p = 0.056p = 0.345p = 0.424p = 0.785p = 0.297BEuthecodon0.098–0.0560.356–0.3030.3710.465p = 0.787p = 0.878p = 0.312p = 0.394p = 0.291p = 0.43Crocodylus–0.2580.1090.342–0.470.3720.247p = 0.502p = 0.781p = 0.406p = 0.24p = 0.364p = 0.689Testudinidae0.6380.506–0.5320.628–0.6110.999p = 0.247p = 0.385p = 0.356p = 0.257p = 0.273p = 0.035*Aquatic turtles–0.825–0.4320.648–0.5170.6240.079p = 0.043*p = 0.393p = 0.164p = 0.293p = 0.185p = 0.9Pelomedusidae0.5050.796–0.8450.693–0.8560.766p = 0.306p = 0.058p = 0.034*p = 0.127p = 0.029*p = 0.131Python0.553–0.0840.227–0.3730.2110.559p = 0.447p = 0.916p = 0.773p = 0.627p = 0.789p = 0.622aff. Hip. protamphibiuskarumensis–0.791–0.4780.86–0.790.7420.363p = 0.004*p = 0.137p = 0.001*p = 0.007**p = 0.014*p = 0.548aff. Hip. aethiopicus0.755–0.555–0.9880.941–0.954NAp = 0.455p = 0.626p = 0.097p = 0.219p = 0.193Equidae0.1750.0110.045–0.5910.231–0.158p = 0.741p = 0.983p = 0.933p = 0.217p = 0.66p = 0.799Bovidae–0.382–0.116–0.012–0.0720.0120.18p = 0.247p = 0.734p = 0.973p = 0.843p = 0.975p = 0.772Tragelaphini–0.5140.1940.482–0.6430.6540.333p = 0.129p = 0.591p = 0.189p = 0.062p = 0.056p = 0.584

TABLE 6 in Body size histories of Shungura Formation reptiles in biotic and abiotic environmental context

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