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Data last updated
Mon 1 Dec 2025
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Bivalvia
| ... | Unionoidea
| Unionidae
| Unioninae
| Anodontini
| Alasmidontina
| Pyganodon
species Pyganodon grandis (Say, 1829): specimens44 available nominal species synonyms (68 total synonyms)
Recent Taxonomic Opinions
Pyganodon grandis — Graf & Cummings (2007), Cyr et al. (2007), Zanatta et al. (2007), Tiemann et al. (2007), Williams et al. (2008), ... Chen et al. (2025), FMCS (2025), Cummings et al. (2025), Hou et al. (2025), Wang et al. (2025)
Pyganodon simpsonaia [sic] — Cyr et al. (2007)
Pyganodon grandis grandis — Watters et al. (2009)
Anodonta grandis grandis — ITIS (2012)
Anodonta grandis corpulenta — ITIS (2012)
Anodonta grandis simpsoniana — ITIS (2012)
Pyganodon simpsoniana — Doucet-Beaupré et al. (2012)
P. grandis — Sheng et al. (2014), Marshall et al. (2018)
Anodonta grandis — Kongim 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
MUSSELp Specimen Records
Canada
unknown
USA
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MCZ_161863
[Shears Lake, Kent Co.], Michigan
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USNM_86664
Bayou Teche, Louisiana
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USNM_86626
Bear Grass Creek, near Louisville, Ky
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MCZ_161861
Camp Lake, Michigan
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USNM_86633
canal, near Cincinnati, Ohio
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UMMZ_104010
Clear Lake, Ulvers Pt., Deuel Co., South Dakota
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USNM_86468
Fort Winnebago
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USNM_86706
Ft. Winnebago
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USNM_86657
Harpeth R., Tenn
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USNM_86381
Lake Champlain, Vermont
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USNM_86702
Lake Concordia, Louisiana
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UAT_2225
Lake Mary, 10 mi. SE Flagstaff, Coconino Co., Arizona
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USNM_86440
Lake Pepin, Ohio
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USNM_86690
Leon Co., Texas
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USNM_87806
Leon, Texas
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USNM_86615
Marietta, Ohio
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MCZ_150645
Michigan
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USNM_86595
Mohawk, N.Y.
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USNM_128835
New Orleans
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SMF_4300
Ohio, U.S.A.
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USNM_86540
Poland, Ohio
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USNM_86659
Port Gibson, Mississippi
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USNM_86666
Red R., Alexandria, Louisiana
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MCZ_150644
Sand Lake, Michigan
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MCZ_150633
Shears Lake, Michigan
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MCZ_161867
Slawsons Lake, Michigan
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USNM_86680
Texas
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USNM_86426
Topeka, Kas.
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USNM_86427
Uphaupee Cr., ..., Ala.
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TMYERS_003
Upper Lake Mary at “The Narrows”, Coconino Co., Arizona
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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
Genbank Vouchers
Georeferenced Genbank Vouchers
USA
UMMZ_265697. (28S: AF305384, COI: AF156504, go to Genbank) Huron River, MI.
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