 Louis Leakey, John Napier, and Phillip Tobias were among the first to extensively study the fossils.The Leakey team and others argued that, due expanded cranial capacity, gnathic reduction, relatively small post-canine teeth (compared to "Paranthropus boisei"), "Homo"-like pattern of craniofacial development, and a precision grip in the hand fragments (which indicated the ability for tool use), set OH 7 apart as a transitional species between "Australopithecus africanus" and "Homo erectus".The Leakey team announced the new species "Homo habilis" in the April 1964 issue of "Nature", igniting debate among the anthropology community which lasted through the 1970s.