Pachystruthio
| Pachystruthio Temporal range: | |
|---|---|
 | |
| Restoration of a male P. dmanisensis | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Infraclass: | Palaeognathae |
| Order: | Struthioniformes |
| Family: | Struthionidae |
| Genus: | †Pachystruthio (Kretzoi, 1954) |
| Type species | |
| †Pachystruthio pannonicus (Kretzoi, 1954) | |
| Other species | |
| |
| Synonyms | |
| |
Pachystruthio is an extinct genus of large flightless birds which lived in Eurasia from the Pliocene to the Middle Pleistocene. Its fossils have been found in Hungary, Greece, Crimea, Georgia, and China. Pachystruthio was related to living ostriches, being another group of Struthioniformes, but separate from the extant ostrich genus Struthio. One of the species, P. dmanisensis, has been estimated as standing 3.5 metres (11 ft) tall and weighing around 450 kg (990 lb), making it much larger than the modern ostrich and one of the largest known birds.