Galatea Bruguière, 1797
Bruguière, 1797, Encycl. Méth. 2: pl. 250.
Type species: Galathea radiata Lamarck, 1804 () = Galatea paradoxa

Galathea Lamarck, 1804
Lamarck, 1804, Ann. Mus. Hist. Nat. 5: 431.
(homonym of Fabricius, 1793; renamed Egeria de Roissy, 1805; renamed Potamophila Sowerby & Sowerby, 1821)
Type species: Galathea radiata Lamarck, 1804 (monotypy) = Galatea paradoxa

Egeria de Roissy, 1805
de Roissy, 1805, Hist. Nat. Moll. 6: 324.
(new name for Galathea Lamarck, 1804)

Potamophila Sowerby & Sowerby, 1821
Sowerby & Sowerby, 1821, Genera of Shells 2: pl. 66.
(new name for Galathea Lamarck, 1804)

Megadesma Bowdich, 1822
Bowdich, 1822, unknown publication: 8, fig. 21.
(new name for Galathea Lamarck, 1804)

Galataea Leach, 1823
Leach, 1823, unknown publication: 59.
(error for Galatea Bruguière, 1797)

Galathaea Bory de St. Vincent, 1827
Bory de St. Vincent, 1827, Encycl. Méth. 2: 151.
Deshayes, 1832, Enc. Méth. 2 (Deuxième partie): 163 [as ‘Galathæa’].
Sowerby, 1839, Conch. Man.: 88.
(error for Galatea Bruguière, 1797)

Galateola Herrmannsen, 1846
Fleming, 1828, Hist. Brit. Anim.: 409. [nomen nudum]
Herrmannsen, 1846, Ind. Gener. Malacol. 1: 458.

Galateia Brito Capello, 1878
Brito Capello, 1878, unknown publication: 2.
(error for Galatea Bruguière, 1797)

Galatheia Dautzenberg, 1891
Dautzenberg, 1891, unknown publication: 576.
(error for Galatea Bruguière, 1797)

Taxonomic History (since 1900)

Egeria (s.s.) — Dall (1903)
Galatea — Pallary (1909), Huber (2010), WoRMS (2011), Kondakov et al. (2020)
Egeria — Pilsbry & Bequaert (1927), Clench (1929), Thiele (1934), Daget (1998), Bogan (2010), IUCN (2010)
— Daget (1998)