sentences:  Remains of this animal have been found in the Upper Elliot Formation and is among the most completely known early ornithischians, shedding new light on the origin of this group.The exact age of this taxon has been the subject of uncertainty.It was originally interprereted as living during the Late Triassic (Norian age), around 210 million years ago; however, Olsen, Kent & Whiteside (2010) stated that there is no independent geochronological support for its assumed age, and the available data makes it impossible to conclusively determine whether "Eocursor" is of Triassic or Early Jurassic (potentially as young as Sinemurian) age.