Ptilopachus

Ptilopachus is an African genus of birds in the New World quail family.

Ptilopachus
Stone partridge
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Galliformes
Family:	Odontophoridae
Subfamily:	Ptilopachinae Bowie, Coehn & Crowe 2013
Genus:	Ptilopachus Swainson, 1837
Type species
Ptilopachus erythrorhynchus = Tetrao petrosus Swainson, 1837
Species
Stone partridge (P. petrosus) Nahan's partridge (P. nahani)

The genus Ptilopachus was introduced in 1837 by the English naturalist William John Swainson to accommodate a single species, the stone partridge, which is therefore the type species. The genus name is from Ancient Greek ptilon meaning "feather" with pakhus meaning "thick" or "dense".

As traditionally defined, only the stone partridge was included in this genus, but based on genetic evidence, it now also includes Nahan's partridge (formerly considered a francolin). The study also concludes that this genus is more closely related to the New World quails (Odontophoridae) and might be considered their only African representative.

Image	Genus	Common Name	Distribution
	P. petrosus Gmelin, 1789	Stone partridge	Kenya and Ethiopia to Gambia
	P. nahani (Dubois, AJC, 1905)	Nahan's partridge	northeastern DR Congo and western Uganda

At about 25 cm (9.8 in) in length, both are relatively small, terrestrial birds with a red eye-ring, base of the bill, and legs, and brownish upperparts.

• Donacobius, the only American species of an otherwise Old World bird lineage