Kalkatungic is a branch of the Pama–Nyungan family,
Kalkatungu, Yalarnnga.
The two languages are not close; Dixon treats them as separate families. A Wakabunga language is often included based on a word list that turned out to be mislabeled Kalkatungu.
Footnotes
References Dixon, R. M. W. 2002. Australian Languages: Their Nature and Development. Cambridge University Press