Cyrenoida insula Morrison, 1946

Cyrenoida panamensis Pilsbry & Zetek, 1931

Iphigenia altior (Sowerby, 1833)
+ Iphigenia ambigua Bertin, 1881

Mytella arciformis (Dall, 1909)

Mytella guyanensis (Lamarck, 1819)
+ Modiola sinuosa King & Broderip, 1832
+ Modiola brasiliensis var. mutabilis Carpenter, 1857

Mytella speciosa (Reeve, 1857)

Mytella strigatus (Hanley, 1843)
+ Mytilus falcatus d’Orbigny, 1846
+ Mytilus charruanus d’Orbigny, 1846

Mytella tumbezensis (Pilsbry & Olsson, 1935)

Mytilopsis adamsi Morrison, 1946

Mytilopsis trautwineana (Tryon, 1866)

Mytilopsis zeteki Hertlein & Hanna, 1949

Polymesoda (Egeta) altilis (Gould, 1853)
+ Cyrena fontainei Philippi, 1851
+ Cyrena olivacea Carpenter, 1857

Polymesoda (Egeta) anomala (Deshayes, 1855)
+ Cyrena (Anomala) isocardioides Deshayes, 1854
+ Cyrena peruviana Deshayes, 1854

Polymesoda (Egeta) inflata (Philippi, 1851)
+ Cyrena maritima C.B. Adams, 1852
+ Cyrena cordiformis Récluz, 1853
+ Cyrena (Anomala) angulata Deshayes, 1854
+ Cyrena dura Deshayes, 1854
+ Cyrena (Anomala) inflata Deshayes, 1854
+ Cyrena panamensis Prime, 1860
+ Cyrena recluzii Prime, 1865
+ Cyrena tumida Prime, 1865
+ Cyrena cardiformis Sowerby, 1878
+ Polymesoda joseana Morrison, 1946

Polymesoda (Neocyrena) boliviana (Philippi, 1851)
+ Cyrena exquisita Prime, 1867
+ Cyrena tribunalis Prime, 1870

Polymesoda (Neocyrena) fontainei (d’Orbigny, 1844)
+ Cyrena fortis Prime, 1861
+ Cyrena chilina Prime, 1867

Polymesoda (Neocyrena) meridionalis (Prime, 1865)

Polymesoda (Neocyrena) nicaraguana (Prime, 1869)
+ Cyrena solida Philippi, 1846

Polymesoda (Neocyrena) ordinaria (Prime, 1865)
+ Cyrena germana Prime, 1867

Polymesoda (s.s.) mexicana (Broderip & Sowerby, 1829)
+ Cyrena (Anomala) nitidula Deshayes, 1854
+ Cyrena fragilis Sowerby, 1878

Polymesoda (s.s.) notabilis (Deshayes, 1855)
+ Polymesoda (Egetaria) pullastra Mörch, 1861
+ Polymesoda zeteki Pilsbry, 1931