 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.Santiagueño also lacks the aspirated and ejective series, but it was a distinct development in Argentina.It also maintains remnants of the Quechua "s–š" distinction, which has otherwise been lost from Southern Quechua, which suggests other varieties of Quechua in its background.