Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Quadrulini

genus Megalonaias Utterback, 1915: synonymy

2 Recent freshwater species (2 total species)

Synonymy

Megalonaias Utterback, 1915

Utterback, 1915. Amer. Midl. Nat. 4(4): 123.
Utterback, 1916. Amer. Midl. Nat. 4(7): 43.
(correct name for Magnonaias Utterback, 1915)
Type species: Unio heros Say, 1829 = Megalonaias nervosa

Magnonaias Utterback, 1915

Utterback, 1915. Amer. Midl. Nat. 4(3): 47.
Utterback, 1916. Amer. Midl. Nat. 4(7): 7.
(incorrect original spelling of Megalonaias Utterback, 1915)
Type species: Unio heros Say, 1829 (original designation) = Megalonaias nervosa

Taxonomic History (since 1900)

The Taxonomic History lists the ways authors have classified the species currently assigned to Megalonaias, since 1900.

Quadrula (sec. Crenodonta) — Simpson (1900), Simpson (1914)
Unio (Crenodonta) — Martens (1900)
Unio (s.s.) — Call (1900)
Quadrula — Simpson (1900), Ortmann (1909), Pilsbry (1910)
Crenodonta — Ortmann (1912), Haas (1929), Clench & Turner (1956)
Megalonaias — Utterback (1915), Ortmann & Walker (1922), Ortmann (1923), Ortmann (1924), Ortmann (1925), ... Hopper et al. (2023), Hauck et al. (2023), Ma et al. (2024), FMCS (2025), Cummings et al. (2025)
Truncilla — Ortmann & Walker (1922)
Amblema (s.s.) — Frierson (1927)
Amblema (Megalonaias) — Frierson (1927), Haas (1930)
Lampsilis (Ligumia) — Frierson (1927)
Amblema (sec. Megalonaias) — Thiele (1934)
Amblema — Goodrich & van der Schalie (1937), Davis & Fuller (1981), Vidrine (1993)
Ligumia — Haas (1969)
Tritogonia — ITIS (2012)
M. — Marshall et al. (2018)