Opisthodactylus

Superregnum: Eukaryota
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Aves
Subclassis: Carinatae
Infraclassis: Neornithes
Parvclassis: Palaeognathae
Ordo: Rheiformes
Familia: † Opistodactylidae
Genus: † Opisthodactylus
Species: † O. patagonicus

Name

Opisthodactylus Ameghino, 1895

Opisthodactylus is an extinct genus of rhea from the Miocene.
Sources

* The Origin and Evolution of Birds by Alan Feduccia