Page last updated
Thu 3 September 2025

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!

Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Quadrulini | Quadrulina | Quadrula

species Quadrula couchiana (Lea, 1860): specimens
     1 available nominal species synonym (2 total synonyms)

Recent Taxonomic Opinions

Amphinaias couchiana — Graf & Cummings (2007), Cummings & Graf (2010)
Quadrula couchiana — Bogan (2010), ITIS (2012), Haag (2012), Williams et al. (2017), Lopes-Lima et al. (2019), Tiemann et al. (2020), Graf & Cummings (2021), FMCS (2021), Czaja et al. (2023), Neemuchwala et al. (2023), Hopper et al. (2023), FMCS (2025)

Range

Rio Grande, western Gulf Coastal Plain, south into northern Mexico.

Map of Georeferenced Specimens

Mexico

USA

USNM_709226. United States, New Mexico, Eddy County, Pecos River, below McMillan Reservoir Dam