The genus Acacia formerly enclosed roughly 1300 species, about 960 of them indigenous to Australia, with the remaining distribute around the tropical to warm-temperate regions of both hemispheres, including Europe, Africa, southern Asia, and the Americas. However, in 2005 the genus was separated into five individual genera under the tribe "Acacieae." The genus Acacia was maintained for the majority of the Australian species and a few in tropical Asia, Madagascar and Pacific Islands. Most of the species outside Australia, and a small number of Australian species, were reclassified into Vachellia and Senegalia. The two final genera, Acaciella and Mariosousa, each contain about a dozen species from the Americas.