Lynch, John. Anejom̃. 2002. hh:s:Lynch:Anejom:2002
/ʔ/ only appears in /aʔo ~ oʔo/ 'no' and the hesitation marker /jaʔ/.
Rising diphthongs exist, but aren't enumerated; /ai au/ vary with /ei ou/.
The /s/ of morpheme-initial /stʃ/ clusters deletes after a consonant.
There are various other allophonic rules involving vowel deletion following /h/.