Australian languages typically favour peripheral consonants word- and syllable-initially, and they are not allowed or common word- and syllable-finally, unlike the apicals.
In the extinct Martuthunira, the peripheral stops /p/ and /k/ shared similar allophony. Whereas the other stops could be voiced between vowels or following a nasal, the peripherals were usually voiceless.
Dixon, R. M. W. (2002). Australian Languages: Their Nature and Development. Cambridge University Press. p. 63. ISBN 0521473780. 0521473780 ↩