In the 1930s a nearly complete fossil with catalog number GM 4362 was assigned to Palaeotis, probably by Lambrecht. Houde and Haubold found three additional specimens in the collection of the Geiseltalmuseum, Martin-Luther University, Halle/S., Germany. One of those three is the holotype specimen of Paleogrus geiseltalensis (=Ornithocnemus geiseltalensis, Lambrecht 1935). Houde and Haubold also requested permission to prepare a fossil cataloged as HLMD Me 7530 at the Hesseches Landesmuseum in Darmstadt, Germany. HLMD Me 7530 was collected from the famous Messel shales. When it was prepared, the two Ornithologists assigned it to Palaeotis as well.