Laycock never presented real evidence for a Kwomtari-Baibai-Pyu family Laycock 1975. The membership is Baibai [bbf] and Fas [fqs] and not Biaka/Nai [bio] as many sources have erroneously repeated. Laycock, Donald C. (1975) Sko, Kwomtari and Left May (Arai) Phyla. In Stephen A. Wurm (ed.), New Guinea Area Languages and Language Study Vol 1: Papuan Languages and the New Guinea linguistic scene (Pacific Linguistics: Series C 38), 849-858. Canberra: Research School of Pacific and Asian Studies, Australian National University.