2015, several other Patagonian and Antarctic ornithopods were also found to be related. The simplified cladogram below results from analysis by Rozadilla et al., 2019, showing all members of Elasmaria forming a polytomy. Palaeoecology Talenkauen, as a basal ornithopod, would have been a small, bipedal herbivore. Other dinosaurs from the Pari Aike Formation include the giant titanosaurid Puertasaurus and the large predatory theropod Orkoraptor. References Notes Citations External links National Geographic news release on Talenkauen; the National Geographic Society was one of the supporters of the research on this dinosaur. Ornithischian genera Cenomanian life Maastrichtian life Late Cretaceous dinosaurs of South America Cretaceous Argentina Fossils of Argentina Fossil taxa described in 2004 Taxa named by Fernando Novas