†subfamily Idiornithinae Brodkorb 1965 (seriema)
Aves - Cariamiformes - Cariamidae
Parent taxon: Cariamidae according to C. Mourer-Chauviré 1981
Sister taxa: Ameghinornis, Cariama, Cariaminae, Chunga, Gypsornis, Miocariama, Noriegavis, Similiornis, Talantatos
Subtaxa: Idiornis
Ecology: ground dwelling omnivore
Distribution: found only at Messel (Eocene of Germany)