Estrellichnus jacaensis from the Eocene Jaca Basin of NE Spain: new locality and new ethological interpretation

New occurrences of Estrellichnus jacaensis in the deep-marine turbidite deposits of the Eocene Hecho Group (Fiscal, Huesca, NE Spain) are described. Most of them include specimens preserved as 'urban fossils' located in several villages of the south-central Pyrenees. Well-preserved morphological features of the new specimens studied and their interactions with accompanying ichnotaxa allow reinterpreting the constructional process and functional significance of Estrellichnus and its rejection as a graphoglyptid. The comparison of this ichnogenus with lebensspuren recorded in oceans and seas around the world has allowed finding a plausible current analogue and proposing a likely tracemaker.