Bivalvia

nominal species Psoronaias plexoideus Frierson, 1927

Psoronaias plexoideus Frierson, 1927 = nomen dubium

‘Lea’ Sowerby, 1868. Conch. Icon. 16: pl. 64, sp. 324; errata [as ‘Unio rusticus’].
Frierson, 1927. Check List N. Amer. Naiades: 63, sp. 273.
(new name for Unio rusticus Sowerby, 1868)
Type(s): TYPE LOST BMNH_XXX, Siam.

Taxonomic Opinions

+ — Cummings et al., 2025: 395.

+ Barynaias plexus (Conrad, 1838) — Haas, 1969: 247.

= Elliptio (Barynaias) plexoideus Frierson — Haas, 1930: 319.

= Psoronaias plexoideus Frierson, 1927 — Frierson, 1927: 63, sp. 273.