Pecten solarium Lamarck, 1819 was often confused with different species of large Neogene pectinids. The two main species confused with it are Pecten gigas (Schlotheim, 1813) and P. ligerianus Dollfus & Dautzenberg, 1906. They both belong to the genus Gigantopecten Rovereto, 1899 whilst P. solarium is a Flabellipecten Sacco, 1897. The three species here studied are morphologically different. The geographic and chronostratigraphic distributions of G. gigas and F. solarium are also different but F. solarium and G. ligerianus are sympatric in the west of France. The systematic revision of the species Pecten solarium is based on a specimen housed in the Lamarck collection of the Muséum national d'Histoire naturelle, Paris. This specimen bears the name "P. solarium" written by Lamarck himself. It is herein designated the lectotype of Lamarck, 1819. The chronostratigraphic and palaeo-geographic distributions of this species are updated.
Mollusca, Bivalvia, Pectinidae, Flabellipecten, Gigantopecten, Eggenburgian, Badenian, Serravallian, Miocene, biometry (AFC), systematic revision, lectotype, palaeobiogeography