ABSTRACT - The ichnotaxon Bulbichnus giornii n. ichnogen. and n. ichnosp. is herein described. The trace fossil comes from the Marnoso- Arenacea Formation (Mount San Sepolcro, Northern Apennines, central Italy). It is a vertical, three dimensional structure that preserves the bulb imprint. The diagnostic characters of this crossichnion which is about 50 cm in length and > 4 cm in diameter, are an almost at ventral side and a convex dorsal side. A rhythmic alternation of bulbs

About 200 Zoophycos specimens, including 90 specimens studied in detail, have been analysed in the continuous Upper Cretaceous–Lower Miocene pelagic sedimentary type sections of the Gubbio area (the Contessa Highway, Contessa Quarry and Bottaccione sections, Northern Apennines). The sediments are reddish to grey limestones and marls of the Scaglia Group and marls with volcaniclastic deposits of the Bisciaro Formation. The aim was to examine the evolutionary trend of what is p