nominal species Unio sphenorhynchus Crosse & Fischer, 1894

Unio sphenorhynchus Crosse & Fischer, 1894

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.

= nomen dubium

Taxonomic Opinions

+ — Cummings et al., 2025

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

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

= Nephronaias sphenorhyncha Crosse & Fischer, 1893 — Bogan, 2010

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

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

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

= Elliptio (Nephronaias) sphenorhynchus (Crosse & Fischer, 1893) — Frierson, 1927

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

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

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

= Unio (Sphenonaias) sphenorhynchus Crosse & Fischer, 1893 — Fischer & Crosse, 1894