Alasmidonta (Sulcularia) badia Frierson, 1927
‘Rafinesque’ of Authors.
Frierson, 1927. Check List N. Amer. Naiades: 19.
Haas, 1969. Das Tierreich 88: 399.
(misidentified reference to Sulcularia badia Rafinesque, 1831)

Anodonta jewittiana Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 927.
Frierson, 1927. Check List N. Amer. Naiades: 97.
(error for Anodonta jewettiana Lea, 1868)

Anodonta jewittii Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 927.
Frierson, 1927. Check List N. Amer. Naiades: 97.
‘Lea’ Haas, 1931. Senckenbergiana 13: 99.
(error for Anodonta jewettii Lea, 1868)

Anodonta linneana Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 264.
Hanley, 1856. Illustr. Descr. Cat. Rec. Bivalve Shells: 387.
Sowerby, 1870. Conch. Icon. 17: pl. 35, sp. 144.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 646.
Simpson, 1914. Descr. Cat. Naiades: 431.
Frierson, 1927. Check List N. Amer. Naiades: 14.
Haas, 1969. Das Tierreich 88: 364.
Parmalee & Bogan, 1998. The Freshwater Mussels of Tennessee: 206.
Watters et al., 2009. Freshw. Mussels OH: 260.
(error for Anodonta linnaeana Lea, 1852)

Anodonta nuttaliana Hanley, 1843
‘Lea’ of Authors.
Hanley, 1843. Illustr. Descr. Cat. Rec. Bivalve Shells: 216.
Frierson, 1927. Check List N. Amer. Naiades: 14.
Turgeon et al., 1988. Am. Fisher. Soc. Spec. Publ. (16): 28.
Williams et al., 1993. Fisheries 18(9): 10.
(error for Anodonta nuttalliana Lea, 1838)

Anodonta pennsylvanica Stark, 1828
‘Lamarck’ of Authors.
Stark, 1828. Elements Nat. Hist. 2: 89.
Lea, 1836. Synopsis Fam. Naiades: 50.
Lea, 1838. Synopsis Fam. Naiades: 30.
Lea, 1852. Synopsis Fam. Naiades: 49.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 263.
Sowerby, 1867. Conch. Icon. 17: pl. 11, sp. 30.
Lea, 1870. Synopsis Fam. Naiades: 79.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 618.
Ortmann & Walker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (112): 40.
Frierson, 1927. Check List N. Amer. Naiades: 22 [as ‘Strophitus undulatus-pennsylvanicus’].
Haas, 1969. Das Tierreich 88: 373 [as ‘Strophitus undulatus pennsylvanicus’].
(error for Anodonta pensylvanica Lamarck, 1819)

Anodonta salmonea Sowerby, 1867
‘Lea’ of Authors.
Sowerby, 1867. Conch. Icon. 17: pl. 19, sp. 74.
Frierson, 1927. Check List N. Amer. Naiades: 15.
F.C. Baker, 1928. Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 155.
(error for Anodonta salmonia Lea, 1838)

Anodonta shafferiana Lea, 1870
‘Lea’ of Authors.
Lea, 1870. Synopsis Fam. Naiades: 81.
Clessin, 1873. Conchyl. Cab. 9(1): 243, pl. 17, figs. 5-7.
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [7].
Call, 1895. Trans. Acad. Sci. St. Louis 7: 60.
Utterback, 1916. Amer. Midl. Nat. 4(7): 311.
Frierson, 1927. Check List N. Amer. Naiades: 23.
(error for Anodonta shaefferiana Lea, 1852)

Anodontites schombergianus Frierson, 1927
‘Sowerby’ of Authors.
Frierson, 1927. Check List N. Amer. Naiades: 97.
Martinez et al., 2004. Mem. Fund. La Salle Cienc. Nat. 159-160: 294.
Lasso et al., 2009. Biota Colombiana 10(1-2): 72.
(error for Anodon schomburgianus Sowerby, 1870)

Elliptio cylindraceus Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 29, sp. 87.
(new name for Unio lugubris Lea, 1838)

Elliptio rugolosus Frierson, 1927
‘Küster’ Frierson, 1927. Check List N. Amer. Naiades: 35.
(error for Unio rugulosus Küster, 1856)

Elliptio (Nephritica) haricotti Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 38, sp. 150.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, fig. 4.
Type(s): LECTOTYPE [AS HOLOTYPE] UMMZ_97047 (by R.I. Johnson, 1972: 144), Guatemala.

Elliptio (Nephronaias) guatemalensis Frierson, 1927
‘von Martens’ Frierson, 1927. Check List N. Amer. Naiades: 36.
(error for Unio (Elliptio) guatemalanus Martens, 1900)

Elliptio (Nephronaias) sajensis Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 37, sp. 139.
Frierson, 1928. Nautilus 41(4): 139, pl. 2, fig. 2.
Type(s): LECTOTYPE [AS HOLOTYPE] UMMZ_108010, Rio Saja, 5 mi W Esmeralda, Guatemala.

Elliptio tetralasmus manubius Frierson, 1927
‘Gould’ Frierson, 1927. Check List N. Amer. Naiades: 34.
(misidentified reference to Unio manubius Gould, 1855)

Fusconaia undata trigonoides Utterback, 1915
‘Frierson, MS’ Utterback, 1915. Amer. Midl. Nat. 4(4): 107, pl. 15, figs. 30A-D; pl. 4, figs. 9a-b.
Frierson, 1927. Check List N. Amer. Naiades: 55, sp. 232d.
(intro'd as intra-sp. of Unio undatus Barnes, 1823)

Glabaris glabrus Frierson, 1927
‘Simpson’ Frierson, 1927. Check List N. Amer. Naiades: 13.
(intro'd as syn of Anodonta impura Say, 1829)

Lampsilis arkansensis Frierson, 1927
‘Lea’ Frierson, 1927. Check List N. Amer. Naiades: 81, sp. 355.
(error for Unio arkansasensis Lea, 1862)

Lampsilis fimbriata Frierson, 1907
Frierson, 1907. Nautilus 21(8): 86, pl. 12, two upper figs. & lower left one.
Frierson, 1927. Check List N. Amer. Naiades: 83, sp. 363.
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_91161, Valles River, Mexico.

Lampsilis propia Frierson, 1927
‘Lea’ Frierson, 1927. Check List N. Amer. Naiades: 75.
(error for Unio proprius Lea, 1865)

Lampsilis (Actinonaias) meddellina Frierson, 1927
‘Lea’ Frierson, 1927. Check List N. Amer. Naiades: 84.
(error for Unio medellinus Lea, 1838)

Lampsilis (Cyrtonaias) tampicoensis kusteriana Frierson, 1927
‘Lea’ Küster, 1862. Conchyl. Cab. 9(2): 275, pl. 93, fig. 1 [as ‘Unio tampicoënsis’].
Frierson, 1927. Check List N. Amer. Naiades: 85, sp. 383d.
(intro'd as intra-sp. of Unio tampicoensis Lea, 1838)
Type(s): TYPE LOST XXX_UNKNOWN, [locality unknown].

Lampsilis (Disconaias) martensi Frierson, 1927
‘Philippi’ Martens, 1900. Biol. Centr.-Amer., Moll.: pl. 37, figs. 1-1a [as ‘Unio aztecorum’].
Frierson, 1927. Check List N. Amer. Naiades: 83, sp. 364.
Type(s): HOLOTYPE (MONOTYPY) ZMB/MOLL_220183, Misantlla, Mexico.

Lampsilis (Disconaias) novileonensis Frierson, 1927
‘Pilsbry’ Frierson, 1927. Check List N. Amer. Naiades: 83 [as ‘novi-leonensis’].
(error for Lampsilis novileonis Pilsbry, 1910)

Lampsilis (Disconaias) pilsbryana Frierson, 1927
‘Say’ Frierson, 1912. Nautilus 26(2): pl. 3, fig. 4 [as ‘Lampsilis purpuriatus’].
Frierson, 1927. Check List N. Amer. Naiades: 83, sp. 368.
Type(s): LECTOTYPE [AS HOLOTYPE] UMMZ_91175 (by R.I. Johnson, 1972: 147), Valles River, Mecos, Mexico.

Lampsilis (Ligumia) nervosa Frierson, 1927
‘Rafinesque’ of Authors.
Frierson, 1927. Check List N. Amer. Naiades: 77, sp. 336.
Haas, 1969. Das Tierreich 88: 445.
(misidentified reference to Unio (Leptodea) nervosa Rafinesque, 1820)

Lampsilis (Ligumia) streckeri Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 74, sp. 321.
Frierson, 1928. Nautilus 41(4): 139, pl. 2, fig. 1.
Type(s): HOLOTYPE UMMZ_91075, Little Red R., Arkansas.

Lampsilis (s.s.) rafinesqueana Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 69, sp. 309.
Frierson, 1928. Nautilus 41(4): 138, pl. 1, figs. 1-2.
Type(s): SYNTYPES UMMZ_91176, Indian Creek, McDonald Co., McDonald.

Lampsilis (s.s.) sowerbyana Frierson, 1927
‘Lea’ Sowerby, 1868. Conch. Icon. 16: pl. 63, sp. 316 [as ‘Unio pictus’].
Frierson, 1927. Check List N. Amer. Naiades: 69, sp. 308.

Lampsilis (Villosa) wrightiana Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 81, sp. 351.
Frierson, 1928. Nautilus 41(4): 139, pl. 2, fig. 3.
Type(s): SYNTYPE UMMZ_91179, Volusia Co., Fla.

Margaritana curreyana Lea, 1842
‘Lea’ of Authors.
Lea, 1842. Trans. Amer. Phil. Soc. 8 [O. 3]: pl. 18, fig. 40.
Agassiz, 1852. Arch. Naturg. 18(1): 47.
Lea, 1852. Synopsis Fam. Naiades: 42.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 263.
Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 499.
Sowerby, 1868. Conch. Icon. 16: pl. 63, sp. 319.
Lea, 1870. Synopsis Fam. Naiades: 68.
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [6].
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 661.
Simpson, 1914. Descr. Cat. Naiades: 474.
Frierson, 1927. Check List N. Amer. Naiades: 21.
Haas, 1969. Das Tierreich 88: 395.
(error for Margaritana curreyiana Lea, 1840)

Margaritana etowahensis Simpson, 1900
‘Conrad’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 672.
Simpson, 1914. Descr. Cat. Naiades: 510.
Frierson, 1927. Check List N. Amer. Naiades: 19.
(error for Margaritana etowaensis Conrad, 1849)

Margaron (Anodonta) marryatana Lea, 1870
‘Lea’ of Authors.
Lea, 1870. Synopsis Fam. Naiades: 82.
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [7] [as ‘Anodonta marryatana’].
Frierson, 1927. Check List N. Amer. Naiades: 15.
(error for Anodonta maryattana Lea, 1840)

Obliquaria reflexa conradi Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 65, sp. 290a.
(intro'd as intra-sp. of Obliquaria (Quadrula) reflexa Rafinesque, 1820)
Type(s): LECTOTYPE ANSP_56695, Alabama R., Ala.

Parreysia robsoni Frierson, 1927
‘Lea’ Sowerby, 1866. Conch. Icon. 16: pl. 36, sp. 198 [as ‘Unio pumilus’].
Frierson, 1927. Check List N. Amer. Naiades: 45.
(new name for Unio pumilus Sowerby, 1866)
Type(s): HOLOTYPE BMNH_1965150, Loc._ ?

Pleurobema tombigbeanum Frierson, 1908
Frierson, 1908. Nautilus 22(3): 27, pl. 3, figs. 3-4.
Frierson, 1927. Check List N. Amer. Naiades: 42 [under P. taitianum Lea].

Pleurobema utterbackii Utterback, 1915
Frierson in Utterback, 1915. Amer. Midl. Nat. 4(5): 197, pl. 5, fig. 12a-b; pl 20, figs. 63A-D.
Frierson, 1927. Check List N. Amer. Naiades: 57, sp. 247 [as ‘Q. (Fusconaia) utterbackii’].
Type(s): HOLOTYPE (ORIG. DESIG.) MCZ_271448, White R., Hollister, Taney Co., Missouri.

Pleurobema (Plethobasus) cicatricoideum Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 45, sp. 203.
(error for Unio cicatricoides Frierson, 1911)

Pleurobema (s.s.) aldrichi Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 44, sp. 197.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, fig. 1.
Type(s): LECTOTYPE ANSP_145246, Selma, Ala.

Pleurobema (s.s.) fictum Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 43, sp. 195.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, figs. 2-2a.
Type(s): HOLOTYPE UMMZ_80791, Cahaba River, Alabama.

Pleurobema (s.s.) marshalli Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 43, sp. 196.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, fig. 3.
Type(s): FIGURED SYNTYPE UMMZ_80859, Tombigbee River, Boligee, Greene Co., Alabama.

Psoronaias kuxensis Frierson, 1917
Frierson, 1917. Nautilus 31: 48, pl. 7, figs. 1-2.
Frierson, 1927. Check List N. Amer. Naiades: 64, sp. 282.
Type(s): HOLOTYPE (ORIG. DESIG.) ANSP_117094, Kux Creek, Chama, Guatemala.

Psoronaias martensi Frierson, 1927
Martens, 1900. Biol. Centr.-Amer., Moll.: 494, pl. 31, figs. 1-2 [as ‘Unio psoricus’].
Frierson, 1927. Check List N. Amer. Naiades: 64, sp. 279.
Type(s): LECTOTYPE [AS TYPE] ZMB/MOLL_39466 (by R.I. Johnson, 1972: 146), N. Guatemala: Rio de las Salinas.

Psoronaias plexoideus Frierson, 1927
‘Lea’ Sowerby, 1868. Conch. Icon. 16: pl. 64, sp. 324; errata [as ‘Unio rusticus’].
Frierson, 1927. Check List N. Amer. Naiades: 63, sp. 273.
(new name for Unio rusticus Sowerby, 1868)
Type(s): TYPE LOST BMNH_XXX, Siam.

Quadrula lachrymosa Swainson, 1840
‘Lea’ of Authors.
Swainson, 1840. Treat. Malacol.: 378.
Hanley, 1843. Illustr. Descr. Cat. Rec. Bivalve Shells: 177.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 256.
Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 497.
Reeve, 1864. Conch. Icon. 16: pl. 9, sp. 33.
Call, 1895. Trans. Acad. Sci. St. Louis 7: 21.
F.C. Baker, 1898. Bull. Chicago Acad. Sci. 3(1): 83, pl. 25, fig. 1; pl. 12, fig. 2.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 776.
Call, 1900. Ind. Dept. Geol. Nat. Res. (1899): 489.
Ortmann, 1909. Nautilus 22(10): 100.
Ortmann, 1909. Ann. Carnegie Mus. 5: 199.
Ortmann, 1910. Nautilus 23(11): 140.
Ortmann, 1910. Nautilus 23: 116.
Ortmann, 1912. Ann. Carnegie Mus. 8: 253.
Simpson, 1914. Descr. Cat. Naiades: 839, 841.
Vanatta, 1915. Proc. Acad. Nat. Sci. 67: 556.
Ortmann & Walker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (112): 14, 16.
Frierson, 1927. Check List N. Amer. Naiades: 47.
F.C. Baker, 1928. Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 84.
R.I. Johnson, 1980. Bull. MCZ 149(2): 90.
Vidrine, 1993. Histr. Distr. Freshw. Mussels LA: 53.
Strayer & Jirka, 1997. Pearly Mussels NY (26): 98.
(error for Unio lacrymosus Lea, 1828)

Quadrula (Cyclonaias) tuberculata utterbackiana Frierson, 1927
‘Lea’ Utterback, 1915. Amer. Midl. Nat. 4(5): 183, pl. 20, fig. 57a-b [as ‘Plethobasus cooperianus’].
Frierson, 1927. Check List N. Amer. Naiades: 52, sp. 224c.
(intro'd as intra-sp. of Obliquaria (Rotundaria) tuberculata Rafinesque, 1820)

Quadrula (Fusconaia) flava sampsoniana Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 55, sp. 235d.
(intro'd as intra-sp. of Obliquaria (Quadrula) flava Rafinesque, 1820)
Type(s): LECTOTYPE UMMZ_92226 (by R.I. Johnson, 1972: 149), Elk River, Missouri.

Quadrula (Fusconia [sic] beadleana Frierson, 1927
‘Lea’ of Authors.
Frierson, 1927. Check List N. Amer. Naiades: 57.
Vidrine, 1993. Histr. Distr. Freshw. Mussels LA: 63 [as ‘Pleurobema beadleanum’].
Burdick & White, 2007. J. Moll. Studies 73: 370 [as ‘Pleurobema beadleanum’].
Haag, 2012. N. Amer. Freshw. Mussels: 71 [as ‘Pleurobema beadleanum’].
(error for Unio beadleianus Lea, 1861)

Quadrula (Pleuronaia) analogia Frierson, 1927
‘Ortmann’ Frierson, 1927. Check List N. Amer. Naiades: 60, sp. 261.
(error for Fusconaia cor var. analoga Ortmann, 1918)

Quadrula (Pleuronaia) meridithii B.H. Wright, 1888
‘Lea’ of Authors.
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [4].
Frierson, 1927. Check List N. Amer. Naiades: 58, sp. 253.
(error for Unio meredithii Lea, 1858)

Quadrula (Quincuncina) vittata Frierson, 1927
‘Lamarck’ Reeve, 1865. Conch. Icon. 16: pl. 23, sp. 106 [as ‘Unio rotundatus’].
Frierson, 1927. Check List N. Amer. Naiades: 50, sp. 218.

Quadrula trapezoides var. pentagonoides Frierson, 1902
Frierson, 1902. Nautilus 16(4): 39.
Frierson, 1927. Check List N. Amer. Naiades: 62 [as ‘A. (Plectomerus) dombeyana’].
(intro'd as intra-sp. of Unio trapezoides Lea, 1831)
Type(s): LECTOTYPE ANSP_128928 (by R.I. Johnson, 1972: 147), Lake Charles, La.

Strophitus undulatus ovatus Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 22, sp. 37e.
R.I. Johnson, 1972. Occ. Pap. Moll. 3(41): 147, pl. 22, fig. 2.
(intro'd as intra-sp. of Anodonta undulata Say, 1817)
Type(s): LECTOTYPE UMMZ_113533 (by R.I. Johnson, 1972: 147), Edwards River, Illinois.

Strophitus undulatus tennesseensis Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 22, sp. 37d.
(intro'd as intra-sp. of Anodonta undulata Say, 1817)
Type(s): LECTOTYPE MCZ_16690 (by R.I. Johnson, 1956: 138), Duck River, Shelbyville, Rockford, Co., Tennessee.

Unio averillii Simpson, 1900
“Wright” of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 560.
Simpson, 1914. Descr. Cat. Naiades: 138.
Frierson, 1927. Check List N. Amer. Naiades: 76.
R.I. Johnson, 1970. Bull. MCZ 140(6): 373.
R.I. Johnson, 1972. Bull. Fla. State Mus. 16(4): 237.
Burch, 1975. Freshw. Unio. North Amer.: 159.
(error for Unio averellii B.H. Wright, 1888)

Unio bissellianus Lea, 1870
‘Lea’ of Authors.
Lea, 1870. Synopsis Fam. Naiades: 50.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 743.
Simpson, 1914. Descr. Cat. Naiades: 714.
Frierson, 1927. Check List N. Amer. Naiades: 35.
Haas, 1969. Das Tierreich 88: 210.
(error for Unio bisselianus Lea, 1867)

Unio cistelliformis Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 716.
Simpson, 1914. Descr. Cat. Naiades: 641.
Frierson, 1927. Check List N. Amer. Naiades: 29.
Haas, 1969. Das Tierreich 88: 228.
R.I. Johnson, 1970. Bull. MCZ 140(6): 317.
Davis et al., 1981. Biol. J. Linn. Soc. 15: 135.
Davis, 1984. Malacologia 25(2): 631.
Williams et al., 1993. Fisheries 18(9): 11.
Haag, 2012. N. Amer. Freshw. Mussels: 73.
(error for Unio cistellaeformis Lea, 1863)

Unio detectus Frierson, 1911
Frierson, 1911. Nautilus 25(5): 52, pls. 2 , lower fig.; pl. 3, upper fig.
Frierson, 1927. Check List N. Amer. Naiades: 45, sp. 202.
Type(s): HOLOTYPE UMMZ_81937, Ohio River.

Unio hanleyanus Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 250.
Sowerby, 1866. Conch. Icon. 16: pl. 46, sp. 249.
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [3].
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 759.
Simpson, 1914. Descr. Cat. Naiades: 780.
Frierson, 1927. Check List N. Amer. Naiades: 42, sp. 175.
Haas, 1969. Das Tierreich 88: 256.
Burch, 1975. Freshw. Unio. North Amer.: 13.
Turgeon et al., 1988. Am. Fisher. Soc. Spec. Publ. (16): 32.
Williams et al., 1993. Fisheries 18(9): 13.
Parmalee & Bogan, 1998. The Freshwater Mussels of Tennessee: 184.
Lydeard et al., 1999. Gulf Mex. Sci. 17(2): 129.
(error for Unio hanleyianus Lea, 1852)

Unio hazelhurstianus B.H. Wright, 1888
‘Lea’ of Authors.
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [3].
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 719 [as ‘Unio (sec. Elliptio) hazelhurstianus’].
Simpson, 1914. Descr. Cat. Naiades: 648.
Frierson, 1927. Check List N. Amer. Naiades: 29 [as ‘Elliptio (Elliptio) hazelhurstianus’].
Haas, 1969. Das Tierreich 88: 229 [as ‘Elliptio (Elliptio) hazelhurstianus’].
R.I. Johnson, 1970. Bull. MCZ 140(6): 333.
Burch, 1975. Freshw. Unio. North Amer.: 164.
(error for Unio hazlehurstianus Lea, 1858)

Unio hippopaeus Lea, 1852
‘Lea’ of Authors.
Lea, 1852. Synopsis Fam. Naiades: 21 [as ‘hippopæus’].
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 261 [as ‘hippopæus’].
Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 497 [as ‘hippopæus’].
Reeve, 1864. Conch. Icon. 16: pl. 11, sp. 40 [as ‘hippopæus’].
Lea, 1870. Synopsis Fam. Naiades: 31 [as ‘hippopæus’].
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [3], [as ‘hippopæus’].
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 767 [as ‘hippopæa’].
Ortmann, 1909. Nautilus 22(10): 101 [as ‘Q. hippopæa’].
Ortmann, 1909. Ann. Carnegie Mus. 5: 203 [as ‘Quadrula undulata hippopæa’].
Simpson, 1914. Descr. Cat. Naiades: 816 [as ‘hippopæa’].
Frierson, 1927. Check List N. Amer. Naiades: 61.
Haas, 1969. Das Tierreich 88: 287.
Clarke, 1973. Malacologia 13(1-2): 35.
Burch, 1975. Freshw. Unio. North Amer.: 165.
Strayer & Jirka, 1997. Pearly Mussels NY (26): 98.
He & Zhuang, 2013. Freshwater Bivalves China: 27.
(error for Unio hippopoeus Lea, 1845)

Unio inusitatus Lea, 1870
‘Lea’ Lea, 1870. Synopsis Fam. Naiades: 51.
‘Lea’ Frierson, 1927. Check List N. Amer. Naiades: 31.
(error for Unio inusitatis Lea, 1859)

Unio leseurianus Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 251.
Frierson, 1927. Check List N. Amer. Naiades: 56.
(error for Unio lesueurianus Lea, 1840)

Unio mellinus Paetel, 1890
‘Conrad’ of Authors.
Paetel, 1890. Cat. Conch.-Samml. 3: 159.
Frierson, 1927. Check List N. Amer. Naiades: 72, sp. 316a.
(error for Unio melinus Conrad, 1838)

Unio mytilloides Frierson, 1927
‘Lea, 1829’ Frierson, 1927. Check List N. Amer. Naiades: 52.
(misidentified reference to Pleurobema mytiloides Rafinesque, 1820; error for Pleurobema mytiloides Rafinesque, 1820)

Unio mytilloides Frierson, 1927
‘Swainson’ Frierson, 1927. Check List N. Amer. Naiades: 91.
(error for Unio (s.s.) mytiloides Swainson, 1840; misidentified reference to Unio (s.s.) mytiloides Swainson, 1840)

Unio panucoensis Martens, 1900
‘von dem Busch’ of Authors.
Martens, 1900. Biol. Centr.-Amer., Moll.: 510, 651.
Pilsbry, 1910. Proc. Acad. Nat. Sci. 61: 533.
Simpson, 1914. Descr. Cat. Naiades: 603.
Frierson, 1927. Check List N. Amer. Naiades: 82.
(error for Unio panacoensis Philippi, 1843)

Unio petrinus Frierson, 1927
‘Call (Mss)’ Frierson, 1927. Check List N. Amer. Naiades: 49.
(intro'd as syn of Unio aureus Lea, 1859)

Unio planilateralis Frierson, 1927
‘Conrad’ of Authors.
Frierson, 1927. Check List N. Amer. Naiades: 31.
Haas, 1969. Das Tierreich 88: 233.
(error for Unio planilateris Conrad, 1838)

Unio popeii Fischer & Crosse, 1894
of Authors.
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(16): 605 [as ‘Unio (Graphonaias) popei’].
Martens, 1900. Biol. Centr.-Amer., Moll.: 504 [as ‘Unio (Nephronaias) popei’].
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 738 [as ‘Unio (sec. Elliptio)’]. [in part]
Pilsbry, 1910. Proc. Acad. Nat. Sci. 61: 535. [in part]
Ortmann, 1912. Ann. Carnegie Mus. 8: 271 [as ‘Elliptio’].
Simpson, 1914. Descr. Cat. Naiades: 700 [as ‘Unio (sec. Elliptio)’]. [in part]
Frierson, 1927. Check List N. Amer. Naiades: 38 [as ‘Elliptio (Popenaias)’]. [in part]
Haas, 1929. Senckenbergiana 11: 330 [as ‘Elliptio (Popenaias)’]. [in part]
Haas, 1969. Das Tierreich 88: 201 [as ‘Nephronaias (Popenaias)’]. [in part]
Graf & Cummings, 2007. J. Moll. Studies 73: 308 [as ‘Popenaias’]. [in part]
Pfeiffer et al., 2019. Zool. Scripta 48: 504 [as ‘Popenaias’]. [in part]
(misidentified reference to Unio popeii Lea, 1857)

Unio reevianus Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 256.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 538.
Simpson, 1914. Descr. Cat. Naiades: 74.
Utterback, 1916. Amer. Midl. Nat. 4(10): 449.
Frierson, 1927. Check List N. Amer. Naiades: 73.
Haas, 1969. Das Tierreich 88: 437.
R.I. Johnson, 1980. Bull. MCZ 149(2): 132.
Oesch, 1984. Missouri Naiades: 225.
Turgeon et al., 1988. Am. Fisher. Soc. Spec. Publ. (16): 31.
Williams et al., 1993. Fisheries 18(9): 12.
Turgeon et al., 1998. Am. Fisher. Soc. Spec. Publ. (26): 35.
Graf & Cummings, 2007. J. Moll. Studies 73: 305.
Bogan, 2010. FADA: [web].
Cummings & Graf, 2010. Ecol. Class. N. Amer. FW Inverts.: 376.
Haag, 2012. N. Amer. Freshw. Mussels: 71 [as ‘Lampsilis reeviana’].
(error for Unio reeveianus Lea, 1852)

Unio ridellii Frierson, 1927
‘Lea’ of Authors.
Frierson, 1927. Check List N. Amer. Naiades: 54.
Haas, 1969. Das Tierreich 88: 300.
Pfeiffer et al., 2016. Conserv. Genet. 17(2): [3].
(error for Unio riddellii Lea, 1861)

Unio sowerbyanus Küster, 1852
‘Lea’ of Authors.
Küster, 1852. Conchyl. Cab. 9(2): 62.
Agassiz, 1852. Arch. Naturg. 18(1): 43.
Reeve, 1864. Conch. Icon. 16: pl. 14, sp. 58.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 520.
Simpson, 1914. Descr. Cat. Naiades: 17.
Frierson, 1927. Check List N. Amer. Naiades: 94.
Haas, 1969. Das Tierreich 88: 483.
Burch, 1975. Freshw. Unio. North Amer.: 173.
R.I. Johnson, 1978. Bull. MCZ 148: 280.
Parmalee & Bogan, 1998. The Freshwater Mussels of Tennessee: 91.
(error for Unio sowerbianus Lea, 1834)

Unio virginea Frierson, 1927
‘Lamarck’ Frierson, 1927. Check List N. Amer. Naiades: 72.
(error for Unio virginana Reeve, 1865)

Unio whiteanus Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 260.
Frierson, 1927. Check List N. Amer. Naiades: 28.
(error for Unio whiteianus Lea, 1852)

Unio zonata Simpson, 1900
‘Rafinesque’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 744.
Simpson, 1914. Descr. Cat. Naiades: 731.
Frierson, 1927. Check List N. Amer. Naiades: 90.
(error for Unio (Aximedia) zonalis Rafinesque, 1820)

Unio (Lampsilis) amphichaena Frierson, 1898
Frierson, 1898. Nautilus 11(10): 109, pl. 1.
Frierson, 1927. Check List N. Amer. Naiades: 87, sp. 395.
Type(s): HOLOTYPE USNM_159935, Sabine R., Logansport, La.

Unio (Nephronaias) ortmanni Frierson, 1913
Frierson, 1913. Nautilus 27(2): 14, pl. 2.
Frierson, 1927. Check List N. Amer. Naiades: 36 [as ‘E. (Nephronaias) sphenorhynchus Cr. & Fisch. 1893’].
Type(s): LECTOTYPE [AS HOLOTYPE] ANSP_117544 (by R.I. Johnson, 1971: 90), [Conchins] Cochins R., Guatemala.

Unio (Obovaria) jacksoniana Frierson, 1912
Frierson, 1912. Nautilus 26(2): 23, pl. 3, figs. 1-3.
Frierson, 1927. Check List N. Amer. Naiades: 91, sp. 412.
Type(s): LECTOTYPE ANSP_106063, Pearl R., Miss.

Unio (Pleurobema) hagleri Frierson, 1900
Frierson, 1900. Nautilus 13(10): 109, pl. 2.
Frierson, 1927. Check List N. Amer. Naiades: 41, sp. 169.
Type(s): LECTOTYPE ANSP_77902, North River, nr. Tynes, Ala.

Unio calamitarum var. prolongus Frierson, 1927
‘C. & F.’ Frierson, 1927. Check List N. Amer. Naiades: 36.
(error for Unio calamitarum var. B prolongata Fischer & Crosse, 1894)