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Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Sphenonaias opacata

nominal species Unio opacatus Crosse & Fischer, 1894

Unio opacatus Crosse & Fischer, 1894 = Sphenonaias opacata

Crosse & Fischer, 1894. J. de Conch. 41: 295.
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(16): 592, pl. 66, figs. 1-1a.
Type(s): HOLOTYPE (MONOTYPY) MNHN-IM-2000-1755, Mexique.

= Sphenonaias opacata

Taxonomic Opinions

= Sphenonaias opacata (Crosse & Fischer, 1894) — Cummings et al., 2025

= Barynaias opacata (Crosse & Fischer, 1894) — Czaja et al., 2023

= Barynaias opacata (Crosse & Fischer, 1893) — Graf & Cummings, 2021

= Barynaias opacata Crosse & Fischer, 1893 — Bogan, 2010

= Barynaias opacata (Crosse & Fischer, 1893) — Graf & Cummings, 2007

= Elliptio opacata Crosse y Fischer, 1893 — Contreras-Arquieta, 2000

= Barynaias opacatus (Crosse & Fischer, 1893) — Haas, 1969

= Elliptio (Barynaias) opacatus (Crosse & Fischer, 1893) — Frierson, 1927

= Unio (sec. Elliptio) opacatus Crosse & Fischer, 1893 — Simpson, 1914

= Unio (sec. Elliptio) opacatus Crosse & Fischer, 1893 — Simpson, 1900

= Unio (Elliptio) opacatus Crosse & Fischer, 1893 — Martens, 1900

= Unio (Uniomerus) opacatus Crosse & Fischer, 1893 — Fischer & Crosse, 1894