Abstract
The present paper reports 8 species of the dinoflagellate genera Ornithocercus Stein, Podolampas Stein and Pyrocystis Murray from the Grand-Lahou lagoon complex. For Ornithocercus and Podolampas genera, dichotomous key for identification of species is presented. Diagnostic descriptions, illustrations and geographic distribution are provided for all taxa. Most species were neritic or neritic-oceanic and tropical or sub-tropical in nature which is indicative of the area of study. New distribution records (Podolampas elegans Schütt and Pyrocystis robusta Kofoid) for the Côte d’Ivoire part of the Gulf of Guinea originated mainly from an oceanographic station (Station 2: Grau of Lahou) situated further from the coastline.
Key words: Côte d’Ivoire, dinoflagellates, Grand-Lahou lagoon complex.