Primer registro de conodontes ashgillianos en la Precordillera (Argentina)

a reworked conodont fauna from the empozada formation (mendoza precordillera) which belongs to the caradoc-ashgill (british series from the upper ordovician) interval is reviewed. for the first time amorphognathus cf. ordovicicus branson & mehl, 1933 is identified in argentina. this species together with a. superbus, define the late caradoc-earliest ashgill of the precordillera. the recovered conodont fauna is similar in composition with those of the british province of the north atlantic realm, suggesting close relationships between both areas.