Comanche Consonant Mutation Initial Association or Feature Spread?

Right at the left edge: initial consonant mutations in the languages of the world

“…There are at least four areas in the Americas where initial consonant mutationlike phenomena are attested: Numic languages (Uto-Aztecan), Mixe-Zoque, Mundurukú and Curuayá (belonging to the Tupi family), and various Macro-Jê languages. 5 In the Numic languages, such as Comanche (Armagost 1989), Southern Paiute (Sapir 1930), and Chemehuevi (Press 1980), certain prefixes cause root-initial alternations not obviously related to their surface phonology, as the Comanche examples in (17) (Armagost 1989) show.…”