Paceyodon davidi was named by Clemens (2011). Its type specimen is NHMUK M45920, a tooth (right lower molariform), and it is a 3D body fossil. Its type locality is Pant 4 (St. Bride's Island), which is in a Hettangian/Sinemurian fissure fill limestone/marl in the United Kingdom. It is the type species of Paceyodon.