Reptilia - Gruiformes

Full reference: G. Mayr. 2007. The birds from the Paleocene fissure filling of Walbeck (Germany). Journal of Vertebrate Paleontology 27(2):394-408

Parent taxon: Cariamae according to G. Mayr 2007

Sister taxa: Brontornithidae, Cariamides, Cunampaiidae, Idiornithidae, Itaboravis, Otides, Palaeociconiidae, Psilopteridae, Lavocatavis

Subtaxa: Gradiornis walbeckensis

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Type: Gradiornis walbeckensis

Ecology: ground dwelling carnivore