Enigmatic dinosaur footprints from the Lower Jurassic of Poland

Abstract

Three unusual dinosaur ichnites are reported from the Hettangian strata of the Holy Cross Mountains, Central Poland. The tracks are compared with similar forms from the Upper Triassic and Lower Jurassic of North America. The Polish footprints resemble Stenonyx Hitchcock (1865), a very small print presumably left by a diminutive or a baby theropod, and Atreipus Olsen and Baird (1986), a footprint suspected to be of ornithischian origin, basically known from Late Triassic deposits.