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Table S1. AICc measures of model support across the primary models considered in the paper, geochemical covariates, and alternative reconstructions of environmental convariates.

Table S2. Model fit (adjusted R2) for simple linear regression of body size on a wide range of environmental covariates.

Table S3. Model results and AICc weights for all possible transitions in the two-phase model of foraminiferan size evolution, showing that the Scythian (Early Triassic: 247.7 million years ago) is strongly favored as the transition point, with atmospheric pO2 as the best Paleozoic model and stasis as the best post-Paleozoic model.

FilenameFormatSizeDescription
EVO_1807_sm_suppmatS1.docx83KSupporting info item
EVO_1807_sm_suppmatS2.docx58KSupporting info item
EVO_1807_sm_suppmatS3.doc69KSupporting info item

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