Species
The following species are recognised in the genus ''Polymesoda'': * '' Polymesoda aequilatera'' (Deshayes, 1855) * '' Polymesoda anomala'' (Deshayes, 1855) * '' Polymesoda arctata'' (Deshayes, 1855) * †'' Polymesoda borealis'' Kadolsky, 1995 * †'' Polymesoda bravoensis'' (Olsson, 1931) * '' Polymesoda caroliniana'' (Bosc, 1801) – Carolina marsh clam * †'' Polymesoda convexa'' (Brongniart, 1822) * †'' Polymesoda cordata'' (J. Morris, 1854) * †'' Polymesoda dejaeri'' Glibert & van de Poel, 1966 * †'' Polymesoda deperdita'' (Lamarck, 1806) * †'' Polymesoda distorta'' (Ludwig, 1865) * †'' Polymesoda donacina'' (F. Sandberger, 1861) * †'' Polymesoda dulwichiensis'' (Rickman, 1860) * '' Polymesoda exquisita'' (Prime, 1867) * '' Polymesoda floridana'' (Conrad, 1846) * '' Polymesoda fontainei'' (d'Orbigny, 1842) * '' Polymesoda fortis'' (Prime, 1861) * '' Polymesoda inflata'' (Philippi, 1851) * †'' Polymesoda laevis'' (Lamarck, 1805) * †'' Polymesoda langauensis'' Hölzl, 1957 * '' Polymesoda meridionalis'' (Prime, 1865) * †'' Polymesoda mermieri'' (Depéret, 1896) * '' Polymesoda mexicana'' (Broderip & G. B. Sowerby I, 1829) * †'' Polymesoda muravchiki'' Pérez, Genta Iturrería & Griffin, 2010 * '' Polymesoda neubaueri'' Coan & Valentich-Scott, 2022 * '' Polymesoda notabilis'' (Deshayes, 1855) * †'' Polymesoda obovata'' (J. Sowerby, 1817) * '' Polymesoda obscura'' (Prime, 1860) * '' Polymesoda ordinaria'' (Prime, 1865) * †'' Polymesoda pireti'' (Cossmann, 1908) * '' Polymesoda placens'' (Hanley, 1845) * '' Polymesoda radiata'' (Hanley, 1845) * †'' Polymesoda salobris'' (Ihering, 1907) * †'' Polymesoda subarata'' (Schlotheim, 1820) * †'' Polymesoda tegalensis'' Oostingh, 1935 * †'' Polymesoda transcaucasica'' (Kvaliashvili, 1962) * '' Polymesoda triangula'' (Busch in Philippi, 1849) * '' Polymesoda tribunalis'' (Prime, 1870) * †'' Polymesoda trigalensis'' (Olsson, 1931) * †'' Polymesoda ulmensis'' (F. Sandberger, 1872) * †'' Polymesoda visenoviensis'' Kadolsky, 1989 ;Former species Many former species of the genus ''Polymesoda'' were transferred to the genus '' Geloina'', while others were synonymized or transferred to different genera. For a list of former species see List of former species in the genus ''Polymesoda''.References
Cyrenidae Bivalve genera {{bivalve-stub