Labial–retroflex consonants are doubly articulated consonants that are co-articulated at the lips and the front part or underside of the tongue against the palate. They are only attested in Yele, an unclassified language of Rossel Island, Papua New Guinea. [1] [2] [3]
Several labial–retroflex consonants are attested in Yele: a voiceless plosive /ʈ͡p/, a nasal /ɳ͡m/, prenasalized /ɳ͡mɖ͡b/ (also analyzed as /ɳ͡mʈ͡p/ but phonetically voiced), and postnasalized /ʈ͡pɳ͡m/, all or most of which may also occur palatalized: /ʈ͡pʲ/, /ɳ͡mʲ/, /ʈ͡pɳ͡mʲ/ and possibly /ɳ͡mɖ͡bʲ/. [1] [2] [3]