Ptilopachus ventralis; Print; Ptilopachus is an African genus of birds in the New World quail family. As traditionally defined; only the stone partridge was included in this genus; but based on genetic evidence it now also includes the 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; but some taxonomists still include this with the Phasianidae.; 1700-1880