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Alabama River at Cahaba, collected from a layer in river bank, [0.2 mi.below mouth of Cahaba River, 7.5 mi. SW of Selma]

Walhonding River, 1 mi. E of Walhonding, 2 mi. W of Mohawk Dam

Lake Erie at Put-in-Bay, South Bass Island

Assiniboine River at Beaudry Provincial Park, about 1 mi. W of Headingley, about 16 mi. W of Winnipeg

Mississippi River at Princeton, [5.5 mi. N of Le Claire]

Big Darby Creek, 6.3 mi. SSE of Plain City, 6.9 mi. WSW of Hilliard

Ohio River

Meramec River at Rankin Estate Drive in Peerless Park, [1.18 mi WSW of Valley Park; 1.04 mi WNW of Peerless Park]

Raccoon Creek at OH Rt. 141 bridge, [1.5 mi. NE of Gage, 9.6 mi. W of Gallipolis]

Sipsey Fork at AL Rt. 60 bridge, to AL Rt. 33 bridge (8.8 miles collected), [4.7 mi. W of Grayson, 9.6 mi. N of Double Springs]

Mississippi River at Bergman Island, (= Indian Isle), N end, East Channel, [2.1 mi. SW of Prairie du Chien]

Scioto River at Colvin Quarry, 1 mi. S of San Margarita

Elk River below US Rt. 64 bridge, 1.3 mi. NW of Kelso, 5.0 mi. E of Fayetteville

Little Miami River at Corwin covered bridge, 2.2 mi. S of Waynesville, 4.6 mi. W of Harveysburg

Mississinewa River ca. 1 mi. E of IN Rt. 67 bridge, 3.5 mi. SW of Albany

Floyds Fork at US Rt. 31E bridge, [1.3 mi. SSE of Thixton, 7.8 mi. S of Jeffersontown]

Little Miami River, [0.3 mi.] above Senior, [2.9 mi.] NE of Morrow, [7.1 mi.] ESE of Lebanon

Genesee River

Middle Fork Stones River at US Rt. 231 bridge, 3 mi. S of Murfreesboro

Mississippi River, in old channel of Black River (R.Mi. 5), [5.3 mi. N of La Crosse]

Ohio River, 150-200 ft. from bank, 2.9 mi. NNW of Moscow (OH), 4.4 mi. SE of New Richmond (OH)

Vermilion River at Fitchville, at OH Rt. 162 bridge, 4.7 mi. W of New London

Muskingum River, above Conesville, 5.8 mi. S of Coshocton

Green River at Livermore, at railroad bridge

Sandusky River at Co.Rt. 6 bridge, 5.6 mi. W of Melmore, 6.3 mi. S of Tiffin

South Fork Saline River at bridge, 10.1 mi. W of Benton

Tuscarawas River at New Philadelphia

Rappahannock River [at end of Banks Ford Road], [below Lock No. 4, 0.6 mi. above mouth of Rocky Pen Run, 5.9 mi. WNW of Fredericksburg]

Iowa River at Iowa City

Hocking River at Nelsonville, [11-12 mi. NW of Athens]

Ouachita River, [1.15 mi ESE of Pine Ridge; 3.38 mi WNW of Gaston Mountain]

West Fork Stones River at Murfreesboro, at TN Rt. 96 bridge, W edge, 4.2 mi. NE of Overall

Sandusky River at bridge, 1.2 mi. NNE of Little Sandusky, 6.4 mi. SE of Upper Sandusky

Walhonding River below US Rt. 36 bridge, 3.5 mi. ESE of Warsaw, 5.5 mi. WNW of Coshocton

Grand River (OH) at Painesville, about 1 mi. above N&W railroad bridge, SE edge

Lake Erie at Pelee Island, S end (Fish Point), [19 mi. N of Sandusky]

Big Walnut Creek at Williams Rd. bridge

Meramec River at Huzzah Wildlife Management Area, at MO H bridge, about 5 mi SE of Leasburg [4.66 mi SE of Leasburg; 2.22 mi NNW of Scotia]

Pomme de Terre River, 4.8 mi. SW of Fristoe, [10.9 mi. S of Warsaw]

East Fork Tombigbee River, ca. 4 mi. N of Amory, [5.8 mi. WSW of Smithville]

St. Francis River, off of MO MM (about 1.5-2 mi E of MM and about 12 mi W of Fredericktown) [3.31 mi ENE of Roselle; 10.57 mi WNW of Freder

Pomme de Terre River at Rodgers Shelter, archaeological site, 4.3 mi. SW of Fristoe, 11.0 mi. S of Warsaw

Marsh Creek, just above mouth of Brushy Creek, [4.2 mi. S of Honeybee, 7.0 mi. NE of Whitley City]

Cedar Creek, [1.27 mi WNW of Grafton, 1.77 mi NE of Cedarburg]

Specific locality unknown

Mississippi River, W shore of East Channel, [1.2 mi. NW of center of Prairie du Chien]

Wisconsin River, [1.15 mi E of Orion, 4.30 mi WNW of Avoca]

Mississippi River, "E Mill Run, just W of Sunfish Lake," [1.8 mi. NW of Prairie du Chien]

Tennessee River, [1.0 mi. W of Savannah, 3.5 mi. E of Crump]

St. Francis River at AR70 bridge, about 2 mi NE of Madison [2.00 mi NNE of Madison, 2.11 mi NW of Widener]