ammonites
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†family Presbyornithidae Wetmore 1926 (waterfowl)

Amniota - Dinosauria

Full reference: A. Wetmore. 1926. Fossil birds formt he Green River deposits of eastern Utah. Annals of the Carnegie Museum 16(3-4):391-402

Parent taxon: Anatoidea according to B. C. Livezey and R. L. Zusi 2007

Sister taxon: Anatalavis

Subtaxa: Headonornis, Presbyornis, Telmabates, Teviornis, Zhylgaia

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Ecology: volant herbivore