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!

Search the database pages:

Unionoidea | Unionidae | Ambleminae | Quadrulini | Quadrulina | Quadrula fragosa

nominal species Unio tragosus Hanley, 1843

‘Conrad’ Hanley, 1843, Illustr. Descr. Cat. Rec. Bivalve Shells: 178, pl. 20, fig. 40.
(error for Unio fragosus Conrad, 1835)

= Quadrula fragosa

Taxonomic Opinions

+ Quadrula fragosa (Conrad, 1835) — Watters et al., 2009
+ Quadrula (sec. Theliderma) fragosa (Conrad, 1836) — Simpson, 1914
+ Quadrula (sec. Theliderma) fragosus (Conrad, 1836) — Simpson, 1900

Page updated: 08:18:54 Tue 01 Jul 2025