Lamalama language
The Lamalama language, also known by the clan name Mbarrumbathama (Austlang) or Mba Rumbathama, formerly known as  Lamu-Lamu or  Lama-Lama, is a Paman language of Queensland, Australia. Lamalama is one of four languages once spoken by the Lamalama people, the others being Morrobolam (Umbuygamu), Mbariman-Gudinhma, and Umpithamu. Naming and language relationships
In January 2019, the ISO database changed its reference name to Lamalama, from Lamu-Lamu. , Glottolog calls it Lamalama, while AIATSIS' Austlang database thesaurus heading is Mbarrumbathama language. Austlang says, quoting linguist Jean-Cristophe Verstraete (2018), that Lamalama, Rimanggudinhma (Mbariman-Gudhinma) and Morrobolam form a genetic subgroup of Paman known as Lamalamic, "defined by shared innovations in phonology and morphology". Within this subgroup, "Morrobolam and Lamalama form a phonologically innovative branch, while Rumanggudinhma forms a more conservative branch". Phonology

Consonants 

 Voiceless fricative sounds /ɸ, θ, ɕ, h/ are heard as voiced [β, ð, ʑ, ɦ] when in consonant clusters and in intervocalic positions. Fricatives /θ, ɕ/ can be heard as laminal and alveolar fricatives [s̻, s] when in word-initial position in free variation among speakers. /h/ can be heard as [x] when in word-initial position in free variation among speakers. The fricative trill /r̝/ is also heard as voiceless [r̝̥] in free variation in initial positions. The trill sound /r/ can be heard as voiceless [r̥] when in word-final contexts. Labial consonants can also be labialized [ʷ] optionally within the onset of stressed syllables, or when after high-back vowel sounds. Consonant lengthening [Cː] can be heard within the onset of stressed syllables. Vowels

Further reading
Verstraete, J. (2018). The Genetic Status of Lamalamic: Phonological and Morphological Evidence. Oceanic Linguistics 57(1), 1-30. University of Hawai'i Press. References 
Verstraete, J. (2019). Mbarrumbathama (Lamalama). Journal of the International Phonetic Association, 49(2), 265-288. Paman languages
Extinct languages of Queensland