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Page last updated
Wed 1 October 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!

Search the database pages:

Bivalvia | ... | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina | Pyganodon

species Pyganodon grandis (Say, 1829): specimens
     44 available nominal species synonyms (72 total synonyms)

Recent Taxonomic Opinions

Pyganodon grandisGraf & Cummings (2007), Cyr et al. (2007), Zanatta et al. (2007), Tiemann et al. (2007), Williams et al. (2008), ... Dai et al. (2025), Perkins et al. (2025), Chen et al. (2025), FMCS (2025), Cummings et al. (2025)
Pyganodon simpsonaia [sic]Cyr et al. (2007)
Pyganodon grandis grandisWatters et al. (2009)
Anodonta grandis grandisITIS (2012)
Anodonta grandis corpulentaITIS (2012)
Anodonta grandis simpsonianaITIS (2012)
Pyganodon simpsonianaDoucet-Beaupré et al. (2012)
P. grandisSheng et al. (2014), Marshall et al. (2018)
Anodonta grandisKongim et al. (2015), Soliman et al. (2016)

Range

Widespread in interior North America, from the Rio Grande to the Arctic. Invading east into the Atlantic Slope and west into the Pacific.

Map of Georeferenced Specimens

species map


Canada

specimen
USNM_86434

Fort Rae, Gt. Slave Lake

specimen
USNM_5712

Great Slave Lake

specimen
USNM_86443

Mo. of Saskatchewan R., L. Winnipeg

specimen
USNM_86442

N End of Lake Winnipeg


Mexico

UMMZ_104019.


unknown

specimen
USNM_86677

[no locality available - North America]


USA

specimen
MCZ_161863

[Shears Lake, Kent Co.], Michigan

specimen
USNM_86664

Bayou Teche, Louisiana

specimen
USNM_86626

Bear Grass Creek, near Louisville, Ky

specimen
MCZ_161861

Camp Lake, Michigan

specimen
USNM_86633

canal, near Cincinnati, Ohio

specimen
UMMZ_104010

Clear Lake, Ulvers Pt., Deuel Co., South Dakota

specimen
USNM_86468

Fort Winnebago

specimen
USNM_86706

Ft. Winnebago

specimen
USNM_86657

Harpeth R., Tenn

specimen
USNM_86381

Lake Champlain, Vermont

specimen
USNM_86702

Lake Concordia, Louisiana

specimen
UAT_2225

Lake Mary, 10 mi. SE Flagstaff, Coconino Co., Arizona

specimen
USNM_86440

Lake Pepin, Ohio

specimen
USNM_86690

Leon Co., Texas

specimen
USNM_87806

Leon, Texas

specimen
USNM_86615

Marietta, Ohio

specimen
MCZ_150645

Michigan

specimen
USNM_86595

Mohawk, N.Y.

specimen
USNM_128835

New Orleans

specimen
SMF_4300

Ohio, U.S.A.

specimen
USNM_86540

Poland, Ohio

specimen
USNM_86659

Port Gibson, Mississippi

specimen
USNM_86666

Red R., Alexandria, Louisiana

specimen
MCZ_150644

Sand Lake, Michigan

specimen
MCZ_150633

Shears Lake, Michigan

specimen
MCZ_161867

Slawsons Lake, Michigan

specimen
USNM_86680

Texas

specimen
USNM_86426

Topeka, Kas.

specimen
USNM_86427

Uphaupee Cr., ..., Ala.

specimen
TMYERS_003

Upper Lake Mary at “The Narrows”, Coconino Co., Arizona

DMNH_149886. Lake Mary, 10 mi. SE Flagstaff, Coconino Co., Arizona

DMNH_75128. Lake Mary, 10 mi. SE Flagstaff, Coconino Co., Arizona

UMMZ_60218. Lake Mary, 9 mi. SE Flagstaff, Coconino Co., Arizona

UF_517091. Lake McMillan Reservoir, N of Carlsbad, Eddy Co., New Mexico, USA

Georeferenced Genbank Vouchers


USA

UMMZ_265697. (28S: AF305384, COI: AF156504, go to Genbank) Huron River, MI.