Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Pachynaias Crosse & Fischer, 1894: synonymy

1 Recent freshwater species (1 total species)

Synonymy

Pachynaias Fischer & Crosse, 1894

Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio spheniopsis Morelet, 1849 (orig. desig.) = Pachynaias spheniopsis

Pavhynaias Contreras-Arquieta, 2000

Contreras-Arquieta, 2000. Mexicoa 2(1): 44.
(error for Pachynaias Fischer & Crosse, 1894)
Type species: Unio spheniopsis Morelet, 1849 = Pachynaias spheniopsis

Taxonomic History (since 1900)

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

Quadrula (sec. Pachynaias) — Simpson (1900), Simpson (1914)
Unio (Pleurobema) — Martens (1900)
Unio (Elliptio) — Martens (1900)
Nephronaias — Ihering (1901)
Plagiola (Arotonaias) — Simpson (1914)
Elliptio (Pachynaias) — Frierson (1927)
Elliptio (Barynaias) — Frierson (1927), Haas (1929)
Pachynaias — Haas (1929), Thiele (1934), Haas (1969), Haas (1969), Graf & Cummings (2007), ... Smith et al. (2020), Graf & Cummings (2021), Czaja et al. (2023), Freeman et al. (2025), Cummings et al. (2025)
Barynaias — Haas (1969)
Pavhynaias [sic] — Contreras-Arquieta (2000)