Palaeotis

Palaeotis is a genus of paleognath birds from the middle Eocene epoch of central Europe. One species is known, Palaeotis weigelti. The holotype specimen is a fossil tarsometatarsus and phalanx. Lambrect (1928) described it as an extinct bustard (genus Otis), and gave it its consequent name (Palaeotis means ancient bustard).[1] After a suggestion by Storrs L. Olson, a review of the type specimen and the referral of several other fossils by Houde and Haubold (1987) concluded that Paleotis is a palaeognath and assigned it to the same order as ostriches; the Struthioniformes.

Description
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.

Other scientists are less convinced that Palaeotis is a struthioniform, placing it instead as a more basal ratite. It may be related to the mysterious Remiornis, a putative ratite known from the Eocene of France.

If Palaeotis is, as Houde and Haubold suggested a basal or even ancestral ostrich, it would be the only ratite known from the Northern hemisphere at this early age, and this has important implications for the evolution of ratites. See Paleognathae.