Linguolabial consonant

Linguolabials, or more specifically apicolabials and laminolabials, are consonants articulated by placing the tongue tip or blade against the upper lip, which is drawn downward to meet the tongue. They represent one extreme of a coronal articulatory continuum that extends from labio-lingual to subapical-palatal places of articulation. Cross-linguistically, linguolabial consonants are very rare. They are found in a cluster of 17 Southern Oceanic languages in Vanuatu, in the Kajoko dialect of Bijago in Guinea-Bissau, in Umotína (a recently extinct Bororoan language of Brazil), and as paralinguistic sounds elsewhere, such as 'expressive' words in Mochi Chaga. They are also relatively common in disordered speech, and the IPA diacritic is specifically provided for in the extensions to the IPA, as it is otherwise rare enough that speech pathologists might be unaware of it.