Evans (2018) lists the Tirio languages as:[2] Baramu is somewhat more divergent in vocabulary, but this may reflect language contact rather than divergence in its position within the family.

The moribund language Abom was once classified as a divergent Tirio language, sharing only an eighth of its lexicon with the others, but it turns out to not belong to the family at all, nor to the Anim family that Tirio is a branch of.

[3] A survey of the Tirio languages can be found in Jore and Alemán (2002).

[4] Usher (2020) reconstructs the consonant inventory as follows:[5] Vowels are *a *e *i *o *u.

The pronouns are:[5] Lower Fly River (Makayam and Baramu) reflexes of proto-Trans-New Guinea (pTNG) etyma:[6]