Abstract
Abstract Dinoflagellate cysts of the Wetzeliella‐complex belonging to the genera Kisselovia (sensu Lentin and Williams, 1976), Rhombodinium, Wetzeliella and Wilsonidium are reported for the first time from Eocene sediments of the Aquitaine Basin, southwestern France. Ten species are illustrated, six of which are described as new: Kisselovia aculeata, K. columna, Rhombodinium translucidum, R. rugosum, Wetzeliella uncinata, and Wilsonidium compactum. The assemblages illustrate the wide range of ornamentation and archeopyle morphology within the Wetzeliella‐complex. Kisselovia aculeata combines a penitabular arrangement of processes with a soleiform archeopyle. Paratabulation in Rhombodinium rugosum is outlined by parasutural folds. Wetzeliella uncinata has a unique archeopyle type, combining an adnate perioperculum with a shorter, free endoperculum. The species of Kisselovia display a para‐quadra paratabulation pattern.
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