The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

The MUSSEL Project Database is moving to a new server, with a new URL! The new address for this page will be: https://musselpdb.org/fmuotwaolcb/db.php?ty=nomsp&id=3323

Search the database pages:

Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Ortmanniana ligamentina

nominal species Unio callosus Lea, 1841

Lea, 1841, Proc. Amer. Phil. Soc. 2: 31.
Lea, 1842, Trans. Amer. Phil. Soc. 8 [O. 3]: 239 [77], pl. 23, fig. 54.
Type(s): HOLOTYPE AMNH_30561, Ohio Canal, 12 mi below Columbus, Franklin Co., Ohio.

= Ortmanniana ligamentina

Taxonomic Opinions

= Sphenonaias callosa (Lea, 1841) — Graf & Cummings, 2021
+ Actinonaias ligamentina — Inoue et al., 2020
= Sphenonaias callosa (Lea, 1841) — Graf & Cummings, 2007
+ Nephronaias (Sphenonaias) mexicana (Philippi, 1847) — Haas, 1969
= Elliptio (Sphenonaias) callosus (Lea, 1841) — Frierson, 1927
= Unio (sec. Elliptio) callosus Lea, 1841 — Simpson, 1914
= Unio (sec. Elliptio) callosus Lea, 1841 — Simpson, 1900
= Unio callosus Lea — B.H. Wright, 1888
= Margaron (Unio) callosus (Lea) — Lea, 1870
= Unio (Niäa) callosus Lea — Adams & Adams, 1857
= Unio callosus Lea, 1841 — Conrad, 1853
= Margaron (Unio) callosus (Lea) — Lea, 1852

Page updated: 09:23:41 Mon 28 Jul 2025