What is "ptiloris"

The genus Ptiloris consists of three allopatric species of birds in the Paradisaeidae family. These birds of paradise are commonly known as riflebirds, so named for the likeness of their black velvety plumage to the uniform of the Rifle Brigade. Alternatively, the bird’s cry is similar to a rifle being fired and hitting its target but a call like this is not commonly reported (see Behaviour and Ecology). They are distributed in the rainforests of New Guinea and Eastern Australia.