The recurrent laryngeal nerve is actually common to all tetrapods, not just mammals. Birds have it, probably dinosaurs had it. https://bioone.org/journals/acta

The recurrent laryngeal nerve is actually common to all tetrapods, not just mammals. Birds have it, probably dinosaurs had it. https://bioone.org/journals/acta-palaeontologica-polonica/volume-57/issue-2/app.2011.0019/A-Monument-of-Inefficiency--The-Presumed-Course-of-the/10.4202/app.2011.0019.full https://bioone.org/journals/acta-palaeontologica-polonica/vo...