MUSSELpdb
Taxonomy
Species & Genus Richness of
freshwater mussels
by Taxonomy
Species & Genus Richness of
freshwater bivalves
by Family
Geography
Species Richness & Endemism of
freshwater mussels
by Geography
Data last updated
Mon 2 March 2026
Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Lampsilini | Ortmanniana ligamentina
nominal species Unio crassus Say, 1817
Unio crassus Say, 1817 = Ortmanniana ligamentina
Lister, 1685. Conch.: pl. 150, fig. 5.
Bruguière, 1797. Encycl. Méth. 2: pl. 249, fig. 1 [as Unio sp.].
‘LeSueur’ Say, 1817. Nich. Encyc. 2: [11], pl. 1, fig. 8.
‘LeSueur’ Say, 1819. Nich. Encyc. 4: [16], pl. 1, fig. 8.
Say, 1858. [in] Binney, Compl. Writings T. Say: 49.
(homonym of Unio crassus Philipsson in Retzius, 1788)
Taxonomic Opinions
+ Actinonaias ligamentina ligamentina (Lamarck, 1819) — Watters et al., 2009: 36.
+ Actinonaias ligamentina (Lamarck, 1819) — Williams et al., 2008: 107.
+ Actinonaias ligamentina (Lamarck, 1819) — Parmalee & Bogan, 1998: 51.
+ Actinonaias carinata carinata (Barnes, 1823) — Burch, 1975: 161.
+ Actinonaias carinatus (Barnes, 1823) — F.C. Baker, 1928: 218.
+ Actinonaias carinata (Barnes, 1823) — Ortmann & Walker, 1922: 47.
+ Lampsilis ligamentinus Lam. — Vanatta, 1915: 551.
+ Lampsilis (Eurynia) ligamentina (Lamarck, 1819) — Simpson, 1914: 80.
+ Lampsilis (sec. Eurynia) ligamentinus Lamarck — Simpson, 1900: 539.
+ Unio (s.s.) ligamentinus Lamarck, 1819 — Call, 1900: 484.
+ Unio ligamentinus Lamarck — Call, 1895: 23.
+ Unio orbiculatus Hild. — B.H. Wright, 1888: [4].
+ Margaron (Unio) ligamentinus (Lam.) — Lea, 1870: 43.
= Unio crassus Say, 1817 — Sowerby, 1868: pl. 95, sp. 520.
= Unio crassus Say — Sowerby, 1866: pl. 40, sp. 220.
+ Unio fasciatus [Raf.] — Conrad, 1853: 249.
+ Unio (Elliptio) ligamentinus Lam. — Mørch, 1853: 46.
+ Margaron (Unio) ligamentinus (Lam.) — Lea, 1852: 28.
+ Unio ligamentinus Lamarck — Küster, 1848: 23.
= Unio crassus Say — Hanley, 1843: 192.
= Margarita (Unio) crassus Say. Bar. — Lea, 1838: 19.
= Unio crassus Say, 1817 — Conrad, 1836: 34, pl. 16.
= Margarita (Unio) crassus (Say, 1817) — Lea, 1836: 24.
= Unio crassus Say, Raf. — Ferussac, 1835: 27, 33.
= Unio crassus — Jay, 1835: 17.
= Unio crassus Say — Lea, 1834: 88.
+ Unio crassidens Lamarck, 1819 — Menke, 1830: 107.
+ Unio cariosus Say — Lea, 1829: 417.
= Unio crassus ‘LeSueur’ Say — Hildreth, 1828: 278, “Fig. 1”.
+ Unio peruviana Lamarck, 1819 — Bory de St. Vincent, 1827: 151, pl. 249, fig. 1.
= Unio crassus — Barnes, 1823: 118, pl. 1, figs. 1a-b.
+ Unio ellipticus — Barnes, 1823: 259.
= Unio (Elliptio) crassa Say — Rafinesque, 1820: 293, sp. 2.
+ Unio crassidens — Lamarck, 1819: 71.
= Unio crassus Say, 1817 — Say, 1819: sp. 1, pl. 1, fig. 8.
= Unio crassus Say, 1817 — Say, 1817: [sp. 1,] pl. 1, fig. 8.
