Lower Tithonian (Upper Jurassic) serpulids (Polychaeta, Sedentaria) have been found in the Czorsztyn Unit in the western part of the Pieniny Klippen Belt. A new species, named as Spirorbis imprimus sp.nov., accompanied by other specifically indeterminable serpulid remnants, was described. Epizoan worms found on shells of both benthic and nektonic animals indicate neritic environmental conditions for the whole assemblage.