The generic allocation ofIbis paganaMilne-Edwards, with a review of fossil ibises (Aves: Threskiornithidae)

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Abstract
On the basis of characters of the tarsometatarsus, Ibispagana Milne-Edwards from the early Miocene of France is assigned to the living genus Plegadis. Plegadis gracilis A. H. Miller and Bowman, 1956, from the late Pliocene of North America, is a junior homonym of Milnea (=Plegadis) gracilis Lydekker, 1891, and the new name Plegadis pharangites is proposed as a substitute. Plegadis paganus and P. pharangites constitute the only valid Tertiary paleospecies of Threskiornithidae. All other extinct taxa that have been referred to this family are here considered to be Aves incertae sedis except for Theristicus wetmorei Campbell and Eudodmus peruvianus Campbell, from the late Pleistocene of Peru, and the flightless Quaternary taxa Aptertbis glenos Olson and Wetmore of Hawaii and Xenicibis xympithecus Olson and Steadman of Jamaica.

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