Bivalvia

nominal species Unio sphenorhynchus Crosse & Fischer, 1894

Unio sphenorhynchus Crosse & Fischer, 1894 = nomen dubium

Crosse & Fischer, 1894. J. de Conch. 41: 296.
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(16): 617, pl. 66, fig. 2-2a.
Type(s): HOLOTYPE (MONOTYPY) MNHN_IM-2000-1792, Mexique.

Taxonomic Opinions

+ — Cummings et al., 2025: 397.

= Nephronaias sphenorhyncha (Crosse y Fischer, 1893) — Czaja et al., 2023: 87.

= Nephronaias sphenorhyncha (Crosse & Fischer, 1893) — Graf & Cummings, 2021: 20.

= Nephronaias sphenorhyncha Crosse & Fischer, 1893 — Bogan, 2010: [23].

= Nephronaias sphenorhyncha (Crosse & Fischer, 1893) — Graf & Cummings, 2007: 308.

= Nephronaias (s.s.) sphenorhynchus (Crosse & Fischer, 1893) — Haas, 1969: 199.

= Elliptio (Nephronaias) sphenorhynchus (Crosse & Fischer) — Haas, 1929: 327.

= Elliptio (Nephronaias) sphenorhynchus (Crosse & Fischer, 1893) — Frierson, 1927: 36, sp. 126.

= Unio (sec. Elliptio) sphenorhynchus Crosse & Fischer, 1893 — Simpson, 1914: 623.

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

+ Unio (Sphenonaias) acutirostris Lea, 1866 — Martens, 1900: 501.

= Unio (Sphenonaias) sphenorhynchus Crosse & Fischer, 1893 — Fischer & Crosse, 1894: 617, pl. 66, figs. 2-2a.