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Odontopterygiformes (was Re: Fossil bird review article (Mayr, 2005, Biol. Rev.)

While on the topic of Paleogene birds, there is also this:

Bourdon, E. (2005). Osteological evidence for sister group relationship between pseudo-toothed birds (Aves: Odontopterygiformes) and waterfowls (Anseriformes). Naturwissenschaften (Online First).

Abstract: "The phylogenetic affinities of the extinct pseudo-toothed birds have remained controversial. Some authors noted that they resemble both pelicans and allies (Pelecaniformes) and tube-nosed birds (Procellariiformes), but assigned them to a distinct taxon, the Odontopterygiformes. In most recent studies, the pseudo-toothed birds are referred to the family Pelagornithidae inside the Pelecaniformes. Here, I perform a cladistic analysis with five taxa of the pseudo-toothed birds including two undescribed new species from the Early Tertiary of Morocco. The present hypothesis strongly supports a sister group relationship of pseudo-toothed birds (Odontopterygiformes) and waterfowls (Anseriformes). The Odontoanserae (Odontopterygiformes plus Anseriformes) are the sister group of Neoaves. The placement of the landfowls (Galliformes) as the sister taxon of all other neognathous birds does not support the consensus view that the Galloanserae (Galliformes plus Anseriformes) are monophyletic."
Electronic supplementary material Supplementary material is available in the online version of this article at http://dx.doi.org/10.1007/s00114-005-0047-0.

Bourdon finds the Galloanserae to be paraphyletic, and Anseriformes are grouped with the extinct Odontopterygiformes in the new clade Odontoanserae. The Galliformes are recovered as the most basal neognath clade. (The hoatzin [Opisthocomidae] comes up as the most basal neoavian clade. Mayr's (2005) paper (mentioned by Mickey Rowe) upholds a previous view that the gastornithids (= diatrymids) are actually anseriforms (though I can't see why they would be in the crown-group). Considering that the dromornithids are also considered by some researchers to be at least closely related to the anseriforms, the basal Neognathae is getting quite crowded: Galliformes, Anseriformes, Dromornithidae, Gastornithids and now Odontopterygiformes. Maybe lithornithids as well.