Bantu, and perhaps less conservative due to contact with non-Bantu Niger-Congo languages; Central Bantu is likely the innovative line cladistically. Northwest Bantu is not a coherent family, but even for Central Bantu the evidence is lexical, with little evidence that it is a historically valid group.

Another attempt at a detailed genetic classification to replace the Guthrie system is the 1999 "Tervuren" proposal of Bastin, Coupez, and Mann. However,