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 [, , , ] when in consonant clusters and in intervocalic positions.
 Fricatives /θ, ɕ/ can be heard as laminal and alveolar fricatives [, ] when in word-initial position in free variation among speakers.
 /h/ can be heard as  when in word-initial position in free variation among speakers.
 The fricative trill /r̝/ is also heard as voiceless  in free variation in initial positions.
 The trill sound /r/ can be heard as voiceless  when in word-final contexts.
 Labial consonants can also be labialized  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

References 

Paman languages
Extinct languages of Queensland