Rediscovery of the syntype series of Astarte omalii de la Jonkaire, 1823 and Astarte basterotii de la Jonkaire, 1823 (Mollusca, Bivalvia, Astartidae)

According to the recent literature the type material of the bivalve species Astarte omalii de la Jonkaire, 1823 and Astarte basterotii de la Jonkaire, 1823 could not be traced. Therefore, and also because of existing confusion between these taxa, neotypes were designated. Recently, however, the syntype specimens of these species were located in the collections of the Muséum National d’Histoire Naturelle (Paris, France). Previously designated neotypes are set aside and the rediscovered samples again become the name-bearing type material. The two syntype series are analysed and illustrated, and lectotypes and paralectotypes are designated.