voiceless implosives (...) are rare in languages. Tojolabal, a language spoken in Mexico, and Cakchiquel, another Quichean language of Guatemala in Central America, are said to use them (E. Pike 1963: 104, 107). Campbell (1973), cited by Pinkerton (1986: 126), notes that in fact all the Quichean languages, spoken in the area round Guatemala city, make phonologically contrastive use of (...) a voiceless uvular implosive made by rarefying the pressure between the larynx and a closure made between the very back of the tongue and the uvula (the rearmost part of the velum).