Table S1. Trilobite ontogeny dataset.

Table S2. Raw dataset with individual measurements for all species included and those excluded from analysis.

Figure S1. Developmental modes in trilobites.

Appendix S1. Estimation of AGI and IDC central value and dispersion statistics.

Appendix S2. Details on the construction of tree diagram.

Appendix S3. ASCII format data file used in phylogenetic signal and tree-based regression analyses.

Appendix S4. Possible taphonomic bias in the preservation of DM.

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