The PDF file includes:

• Table S1. Comparison of the Cretaceous Paraphyllanthoxylon species and the anatomically similar genus Aplectotremas.
• Legend for data file S1
• References (39–51)

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Other Supplementary Material for this manuscript includes the following:

• Data file S1. Cretaceous angiosperm wood fossils used to create Fig. 1 (Excel file).