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.

Taxonomic Opinions

= Sphenonaias opacata (Crosse & Fischer, 1894) — Cummings et al., 2025: 338, pl. 70 bottom, Tables 3, 9.

= Barynaias opacata (Crosse & Fischer, 1894) — Czaja et al., 2023: 86.

= Barynaias opacata (Crosse & Fischer, 1893) — Graf & Cummings, 2021: 20.

= Barynaias opacata Crosse & Fischer, 1893 — Bogan, 2010: [4].

= Barynaias opacata (Crosse & Fischer, 1893) — Graf & Cummings, 2007: 308.

= Elliptio opacata Crosse y Fischer, 1893 — Contreras-Arquieta, 2000: 44.

= Barynaias opacatus (Crosse & Fischer, 1893) — Haas, 1969: 246.

= Elliptio (Barynaias) opacatus (Crosse & Fischer, 1893) — Frierson, 1927: 39, sp. 159.

= Unio (sec. Elliptio) opacatus Crosse & Fischer, 1893 — Simpson, 1914: 626.

= Unio (sec. Elliptio) opacatus Crosse & Fischer, 1893 — Simpson, 1900: 712.

= Unio (Elliptio) opacatus Crosse & Fischer, 1893 — Martens, 1900: 517.

= Unio (Uniomerus) opacatus Crosse & Fischer, 1893 — Fischer & Crosse, 1894: 592, pl. 66, figs. 1-1a.