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Data last updated
Mon 1 Dec 2025
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Bivalvia
| Unionoida
| Unionoidea
| Unionidae
| Ambleminae
| Lampsilini
| Potamilus
species Potamilus fragilis (Rafinesque, 1820): specimens9 available nominal species synonyms (15 total synonyms)
Recent Taxonomic Opinions
Leptodea fragilis — Graf & Cummings (2007), Tiemann et al. (2007), Williams et al. (2008), Watters et al. (2009), Bogan (2010), ... Inoue et al. (2020), Klymus et al. (2020), Gasparini et al. (2020), Graf & Cummings (2021), Hauck et al. (2023)
Medionidus mcglameriae — Graf & Cummings (2007), Cummings & Graf (2010), ITIS (2012)
Potamilus fragilis — Smith et al. (2020), Johnson & Smith (2020), Smith & Johnson (2020), FMCS (2021), Keogh et al. (2021), Hopper et al. (2023), FMCS (2025)
Range
Widespread in the Interior, Great Lakes and Gulf Coastal Plain basins, North America. Introduced to the Northern Atlantic Slope.
Map of Georeferenced Specimens
MUSSELp Specimen Records
USA
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USNM_86119
Claiborne, Ala.
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USNM_86118
Columbus, Miss.
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USNM_86118
Columbus, Miss.
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ANSP_20209
creeks, Kentucky
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UMMZ_209186
L. Butte de Morts, Wisc.
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ANSP_416326
Sangamon River, Lake of the Woods, Mahomet, Champaign Co., Illinois 40.2040° N, 88.3876° W
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USNM_160709
Spring R., Hardy, Ark
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UMMZ_130460
Tombigbee River, Epes, Sumpter Co., Alabama
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Genbank Vouchers
Georeferenced Genbank Vouchers
USA
INHS_39037_1. (28S: MK036091, 5.8S: MK036174, COI: MK044923, ITS1: MK036174, ND1: MK045074, go to Genbank) Illinois River, Illinois drainage (39.6862, -90.6416).
INHS_39037_2. (28S: MK036092, 5.8S: MK036175, COI: MK044924, ITS1: MK036175, ND1: MK045075, go to Genbank) ditto.
INHS_39037_3. (28S: MK036093, 5.8S: MK036176, COI: MK044925, ITS1: MK036176, ND1: MK045076, go to Genbank) ditto.
UF_438237-LfraAla001. (COI: MT662019, ITS1: MT661766, ND1: MT669665, go to Genbank) USA, Alabama, Monroe County, Alabama River at RM 71, first bend in river downstream of Claiborne Lock & Dam; UTM Zone 16 3496668E, 447857N (31.603941, -87.54968).
UF_439528-LfraMob063. (COI: MT662033, ND1: MT669679, go to Genbank) USA, Alabama, Shelby County, Living River Preserve, picnic area (33.16938, -87.02185).
UF_439528-LfraMob064. (COI: MT662032, ND1: MT669678, go to Genbank) ditto.
UF_439529-LfraAmi057. (COI: MT662029, ND1: MT669675, go to Genbank) USA, Louisiana, Livingston Parish, 0.8km ESE from Babin Road, 1.9km South of the river fork (30.388667, -90.967791).
UF_439529-LfraAmi058. (COI: MT662030, ND1: MT669676, go to Genbank) ditto.
UF_439529-LfraAmi059. (COI: MT662031, ND1: MT669677, go to Genbank) ditto.
UF_439352-LfraAmi041. (COI: MT662021, ND1: MT669667, go to Genbank) USA, Louisiana, Livingston Parish, Amite River (30.38867, -90.96779).
UF_439352-LfraAmi042. (COI: MT662022, ND1: MT669668, go to Genbank) ditto.
UF_439330-LfraAmi040. (5.8S: MT661773, COI: MT662020, ITS1: MT661773, ND1: MT669666, go to Genbank) USA, Louisiana, Livingston Parish, Amite River (30.40467, -90.95933).
UF_439365-LfraPrl045. (COI: MT662025, ND1: MT669671, go to Genbank) USA, Louisiana, St. Tammany Parish, Pearl River (30.455856, -89.763868).
UF_439332-LfraPrl043. (COI: MT662023, ND1: MT669669, go to Genbank) USA, Louisiana, St. Tammany Parish, Pearl River (30.464601, -89.771283).
UF_439332-LfraPrl044. (5.8S: MT661780, COI: MT662024, ITS1: MT661780, ND1: MT669670, go to Genbank) ditto.
UF_439343-LfraPrl046. (COI: MT662026, ND1: MT669672, go to Genbank) USA, Louisiana, St. Tammany Parish, Pearl River (30.486114, -89.785241).
UF_439343-LfraPrl047. (COI: MT662027, ND1: MT669673, go to Genbank) ditto.
UF_439343-LfraPrl048. (COI: MT662028, ND1: MT669674, go to Genbank) ditto.
UF_441212. (5.8S: KT285687, COI: KT285643, ITS1: KT285687, go to Genbank) USA, Texas, Robertson County, Brazos River at FM 485, west of Highway 6 (30.8676502, -96.6956368).
JBFMC_12094_1. (16S: PQ238851, go to Genbank) USA: Louisiana, Bayou Pierre.
JBFMC_12076_1. (16S: PQ238850, go to Genbank) USA: Louisiana, Calcasieu River.
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