Peytoia is a genus of hurdiid radiodont that lived in the Cambrian period, containing two species, Peytoia nathorsti from the Miaolingian of Canada and Peytoia infercambriensis from Poland, dating to Cambrian Stage 3. Its two frontal appendages had long bristle-like spines, it had no fan tail, and its short stalked eyes were behind its large head. 108 specimens of Peytoia are known from the Greater Phyllopod bed, where they comprise 0.21% of the community. Peytoia infercambriensis is the geologically oldest known radiodont species.