Claim: Sivaladapis, a now extinct primate, survived the mass extinction event at the Cretaceous-Paleogene boundary and are the first true primates appearing in the earliest Eocene.
Evidence: Sivaladapis is an extinct, adapiform primate genus that belongs to the family Sivaladapidae. Roughly 10 million years after the mass extinction event at the Cretaceous-Paleogene boundary that eliminated many organisms, including the non-avian dinosaurs, adapiform primates appear simultaneously in the fossil record of the Holarctic along with many other mammalian lineages that rapidly evolved and diversified. Adapiform and omomyid primates are the first true primates appearing in the earliest Eocene around 55 million years ago.