Duonychus tsogtbaatarikobayashi，Zelenitsky，Fiorillo＆Chinzorig，2025 www.cell.com/iscience/iscience/fulltext/fulltext/s2589-0042(25)00401-8：00401-8 didactyl therizinosaur, possessing only two manual digits• A keratinous sheath on digit I provides rare insight into theropod claw structure• Duonychus re
