From the introduction: "Quiegolani Zapotec (henceforth QZ) words contain initial consonant clusters of two or even three consonants and most of these consonant clusters show a decreasing slope of sonority. This violates sonority constraints proposed by Greenberg in 1978 and further discussed by Bell and Saka (1983). This, however, is understandable when viewed from a diachronic perspective. This will be discussed in section 6.4.
"Further, QZ, like most Zapotec languages, has a lenis-fortis distinction among some of its consonants. However, this distinction is less clear in QZ than in other Zapotec languages and carries a lower functional load."
"Quiegolani Zapotec phonology,"
Work Papers of the Summer Institute of Linguistics, University of North Dakota Session: Vol. 37, Article 4.
Available at: https://commons.und.edu/sil-work-papers/vol37/iss1/4