A further possibility is that Toumaï is not ancestral to either humans or chimpanzees at all, but rather an early representative of the Gorillini lineage. Brigitte Senut and Martin Pickford, the discoverers of "Orrorin tugenensis", suggested that the features of "S. tchadensis" are consistent with a female proto-gorilla. Even if this claim is upheld the find would lose none of its significance, because at present, very few chimpanzee or gorilla ancestors have been found anywhere in Africa. Thus if "S. tchadensis" is an ancestral relative of the chimpanzees or gorillas, then it represents the earliest known member of "their" lineage. And "S. tchadensis" does indicate that the last common ancestor of humans and chimpanzees is unlikely to closely resemble extant chimpanzees, as had been previously supposed by some paleontologists.