Labiodental ɱ in Drubea

While labiodental [ɱ] occurs frequently across the world's languages as a predictable nasal allophone before labiodental fricatives [f] and [v], a new source for the same segment not previously reported elsewhere is described here. In Drubea, it arises through nasal spreading from a nasal vowel to a preceding oral fricative. While partly assimilatory in nature, we see that it is also partially dissimilatory in effect with greater segmental consequences than usually associated with the appearance of [ɱ] in the world's languages.