“…characterizes areas of high productivity[10,11,17,22,25,26,[34][35][36][37][38][39] Impagidinium spp. is rather composed of proximochorate gonyaulacoid cysts which are typical of oceanic marine environments[10,11,17,18,22,30,31,35,[40][41][42][43]] Palaeohystrichophora spp. consists of the peridinian cysts Palaeohystrichophora infusorioides and Palaeohystrichophora palaeoinfusa.…”