Rapid Asia–Europe–North America geographic dispersal of earliest Eocene primate Teilhardina during the Paleocene–Eocene Thermal Maximum

Correlated PETM sections and separately catalogued Teilhardina dental samples support an Asia-to-Europe-to-North-America appearance sequence within a short earliest-Eocene interval.

Separately catalogued Teilhardina dental samples in China, Belgium and Wyoming occur in correlated PETM sections within an approximately 56–55.8 Ma sequence; correlation and dental taxonomy do not make them one migrating population or a global genus origin.

The primary study identifies separately catalogued PETM dental samples as Teilhardina in three sections, while keeping their correlated appearance sequence distinct from a single population, direct ancestry or a crown-Primate diagnosis.

The profiled Teilhardina samples are from the Hengyang Basin in China, Dormaal in Belgium and the Bighorn Basin in Wyoming; these three correlated localities do not establish a complete distribution or migration track.

The three correlated Teilhardina samples are dental and stratigraphic evidence; they do not directly record diet, habitual habitat, locomotion, body mass or ecological guild.

Dental comparisons among separately catalogued Teilhardina samples support the reported PETM morphological sequence; no associated postcranial skeleton is documented by this comparison.