Murinhpatha is still spoken by a substantial
community mainly at Wadeye (Port Keats), Northern
Territory, Australia. Street and Mollinjin's articulatory
diagrams show that the dental series is interdental before
non-front vowels /a,U/ but laminal post-alveolar (with
tongue tip behind the lower teeth) before front vowels.
This distribution seems to argue for this series being
underlying dental, rather than being (lamino-)palatal as
they suggest. The palatal variant is thus due to a front
vowel position. However, this does not account for
palatal variants occurring in syllable-final position.
Retroflex consonants do not occur word-initially. /j/
occurs word-finally after vowels other than /i/. Primary
stress is normally on the first syllable, with alternating
stresses on subsequent syllables.

Street, C.S. and G.P. Mollinjin. 1981. "The phonology of
Murinbata". Work Papers of SIL-AAB, Series A, No. 5:
183-244. (Summer Institute of Linguistics, Australian
Aborigines Branch, Darwin).