The most salient distinction between Ayacucho Quechua and the others is that it lacks the aspirated (tʃʰ, pʰ, tʰ, kʰ, qʰ) and ejective (tʃʼ, pʼ, tʼ, kʼ, qʼ) series of stop consonants. The other varieties of Bolivia and Southern Peru taken together have been called Cusco–Collao Quechua (or "Qusqu–Qullaw"); however, they are not monolithic. For instance, Bolivian Quechua is morphologically distinct from Cusco and Ayacucho Quechua, while North Bolivian is phonologically quite conservative compared to both South Bolivian and Cusco so there is no bifurcation between Ayacucho and Cusco–Collao.