Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Section localities.
  • fig. S2. Photos of P2 marker bed.
  • fig. S3. Updated GH section.
  • fig. S4. Stable isotopes of Arenahippus tooth enamel.
  • fig. S5. ETM2 dwarfing patterns of Arenahippus, Diacodexis, Hyopsodus, and Cantius.
  • fig. S6. Tooth size regression analyses.
  • table S1. WT carbonate nodule δ13C.
  • table S2. Updated GH carbonate nodule δ13C.
  • table S3. Carbon and oxygen isotope data of Arenahippus tooth specimens.
  • table S4. Stratigraphic levels and tooth size observations associated with each specimen in this study.

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