Mawes is added by Ross (2005), but not retained by Usher; Isirawa was rejected by Ross, but retained by Usher and by Donohue (2002).
Malcolm Ross (2005) removed them and linked them with another erstwhile branch of TNG in a Tor–Kwerba proposal.
Usher follows Ross, but adds the Nimboran languages as well.
[1] Isirawa / Saberi Airoran Samarokena Bagusa Kauwera / Kaowerawedj Kwerba / Air Mati Kwerba Mamberamo / Nopuk Trimuris Usher uses the label 'West Foja Range' to avoid the ambiguity of the name 'Kwerb(a/ic)'.
Data for Samarokena is limited, but clear cognates linking Samarokena to the other Kwerba languages include the words for ‘fire’, ‘man’, ‘stone’, and ‘sun’ (note that hV- is assumed to be an accretion).