sektensaurus (meaning "island lizard", "sekten" meaning "island" in tehuelche) is a genus of ornithopod dinosaur, possibly an elasmarian, from the late cretaceous (campanian to maastrichtian) of patagonia, argentina. its remains were uncovered in the fluvial tuffs of the lago colhué huapí formation in the golfo san jorge basin. the type and only species is s. sanjuanboscoi.