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Data last updated
Thu 18 Dec 2025
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Bivalvia
| ... | Unionoidea
| Unionidae
| Ambleminae
| Popenaiadini
| Sphenonaias plexus
nominal species Unio pliciferus var. B minor Fischer & Crosse, 1894
 Unio pliciferus var. B minor Fischer & Crosse, 1894 = Sphenonaias plexus
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(16): 581, pl. 69, fig. 4.
(homonym of Unio margaritifer var. minor Rossmässler, 1835; intro'd as intra-sp. of Unio pliciferus Lea, 1838)
Type(s): HOLOTYPE (MONOTYPY) MNHN-IM-2000-1812, Rio Medellin, Mexique.
= Sphenonaias plexus Taxonomic Opinions+ Sphenonaias plexus (Conrad, 1838) — Cummings et al., 2025 + Barynaias plexus (Conrad, 1838) — Haas, 1969 = Unio (sec. Elliptio) plexus var. minor Crosse & Fischer, 1894 — Simpson, 1914 = Unio (Elliptio) pliciferus var. minor Crosse & Fischer, 1894 — Martens, 1900 + — Simpson, 1900 = Unio (Psoronaias) pliciferus var. B, minor Crosse & Fischer, 1894 — Fischer & Crosse, 1894
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