Ceratogyrus darlingi (commonly called burst horned baboon or African rear-horned baboon, synonym Ceratogyrus bechuanicus) is a theraphosid spider from southern Africa, mainly Botswana and Lesotho. They reach a body length of about 5 inches (130 mm) and are ash-gray, mud-brown to black. The peltidium features a black foveal horn.