This page lists the available, Recent nominal species as well as known misidentifications, etc. recorded in the MUSSEL Project Database that have not been circumscribed under any valid species. Fossil species are omitted.
Ravenel, 1834. Cat. Rec. Shells: 7. [nomen nudum]
‘Fer.’ Lea, 1836. Synopsis Fam. Naiades: 46. [nomen nudum]
‘Fer.’ Lea, 1838. Synopsis Fam. Naiades: 28. [nomen nudum]
‘Fer.’ Lea, 1852. Synopsis Fam. Naiades: 44. [nomen nudum]
‘Fer.’ Lea, 1870. Synopsis Fam. Naiades: 70. [nomen nudum]
(misidentified reference to Mytilus anatinus Linnaeus, 1758)
Sowerby in Richardson, 1836. Fauna boreali-americana 3: 316.
Sowerby, 1870. Conch. Icon. 17: pl. 31, sp. 124.
Anodontites (s.s.) brevis — Simpson (1914), Haas (1969)
‘Lea’ of Authors.
‘Lea’ of Authors.

‘Lanza?’ Sowerby, 1867. Conch. Icon. 17: pl. 15, sp. 56.
‘Lea’ Sowerby, 1870. Conch. Icon. 17: pl. 29, fig. 56b.
Type(s): LECTOTYPE BMNH_1965211, Hab._?
Bourguignat, 1885 of Authors.
‘Klein. Brown’ of Authors.
Rafinesque, 1832. Atl. Jour. 1(4): 154.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 92.
Anodontites aperta — Simpson (1914), Simone (2006)
Férussac, 1822. Art. Anod., in Dict. class. d’hist. nat. 1: 397. [nomen nudum]
Krynicki, 1837. Bull. Soc. imp. Nat. Moscou 10(2): 58. [nomen nudum]
‘Stentz’ Villa, 1841. Dispos. Syst. Conchyl.: 40. [nomen nudum]
‘Fer.’ Lea, 1836. Synopsis Fam. Naiades: 54. [nomen nudum]
Lea, 1838. Synopsis Fam. Naiades: 32. [nomen nudum]
‘Fer.’ Lea, 1852. Synopsis Fam. Naiades: 53. [nomen nudum]
(misidentified reference to Dianisotis chinensis Rafinesque, 1831)
Paetel, 1890. Cat. Conch.-Samml. 3: 177.
Villa of Authors.
(homonym of Anodonta compressa Menke, 1830)
Brusina, 1870. Contrib. Malac. Croat.: 32. [nomen nudum]
Brusina, 1870. Contrib. Malac. Croat.: ??. [nomen nudum]
‘Küst.’ of Authors.
‘Ferussac’ of Authors.
Lea, 1836. Synopsis Fam. Naiades: 54. [nomen nudum]
Lea, 1838. Synopsis Fam. Naiades: 32. [nomen nudum]
Jay, 1839. Cat. Rec. Shells: 27. [nomen nudum]
Lea, 1852. Synopsis Fam. Naiades: 53. [nomen nudum]
‘Küst.’ C.B. Adams, 1847. Cat. Gen. Sp. Adams: 14. [nomen nudum]
Servain, 1885 of Authors.
Locard, in MNHN coll. of Authors.
de Gregorio, 1914. Il Nat. Siciliano 2: 63, pl. 11, figs. 4a-c.
Anodonta foliopsis — de Gregorio (1914)
‘Fer.’ Lea, 1836. Synopsis Fam. Naiades: 54. [nomen nudum]
‘Fer.’ Lea, 1838. Synopsis Fam. Naiades: 32. [nomen nudum]
‘Fer.’ Lea, 1852. Synopsis Fam. Naiades: 53. [nomen nudum]
Menke of Authors.
‘Z.’ Anton, 1839. Verz. Conchylien: 16. [nomen nudum]
(error for Anodonta abyssina Morton, 1836)
White, 1893. Non-Marine Foss. Moll.: 478 [72].
Anodonta abyssina — Henderson (1935)
(intro'd as intra-sp. of Anodonta ferussaciana Lea, 1834)
de Gregorio, 1914. Il Nat. Siciliano 2: 64, pl. 11, figs. 5a-b.
Anodonta ferussaceana [sic] var. incertopsis — de Gregorio (1914)
Bourguignat, 1886 of Authors.
(error for Anodonta foliopsis de Gregorio, 1914)
de Gregorio, 1914. Il Nat. Siciliano 2: pl. 11, caption.
‘Küster’ Lea, 1870. Synopsis Fam. Naiades: 84. [nomen nudum]
‘Kutsch.’ Brusina, 1870. Contrib. Malac. Croat.: 32. [nomen nudum]
Kokeil, Kreglinger, Binn. Moll., p. 333, 1870 of Authors.
‘Z.’ Westerlund, 1890. Fauna Paläarct. Binnenconch. 2(7): 297 [as ‘proboscidæa’]. [nomen nudum]
(intro'd as intra-sp. of Anodonta subcylindracea Lea, 1838)
de Gregorio, 1914. Il Nat. Siciliano 2: 63, pl. 12, figs. 1a-e.
Anodonta subcilindracea [sic] var. propexilis — de Gregorio (1914)
(homonym of Anodonta (Lastena) ohiensis var. radiata Rafinesque, 1820)
Bruguière, 1797. Encycl. Méth. 2: pl. 203 [204], fig. 4a-b [as Anodontites sp.].
‘Val.’ Bory de St. Vincent, 1827. Encycl. Méth. 2: 147.
‘Pfeiff.’ Eichwald, 1838. Bull. Soc. imp. Nat. Moscou 11: 163. [nomen nudum]
(homonym of Anodonta cygnea var. rossmasleri Malzine, 1867)
‘Kinberg’ Drouët, 1852. Etudes Nayades de la France: 17. [nomen nudum]
‘Kutsch.’ Brusina, 1870. Contrib. Malac. Croat.: 32. [nomen nudum]
‘Kstr.’ Westerlund, 1890. Fauna Paläarct. Binnenconch. 2(7): 299. [nomen nudum]
‘Conr.’ Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 503. [nomen nudum]
Bourguignat, 1886 of Authors.
‘Vidovic’ Frauenfeld, 1856. Fauna Dalm.: 76. [nomen nudum]
Villa of Authors.
Kutschig in Brusina, 1866. Moll. Dalm.: 131. [nomen nudum]
(homonym of Anodon trigonus Spix in Wagner, 1827)
Held, 1836. Isis (Oken) 1836: 280.
Fitzinger, 1833. Syst, Verz. Österr. Weichth.: 299. [nomen nudum]
(homonym of Anodonta virens Lea, 1852)
‘Stentz’ Villa, 1841. Dispos. Syst. Conchyl.: 40. [nomen nudum]
(homonym of Anodonta (Lastena) ohiensis var. viridis Rafinesque, 1820)
‘Lea’ Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 503. [nomen nudum]
(misidentified reference to Symphynota woodiana Lea, 1834)
‘Lea’ Bautista, 1991. Indo-Pacific Prehist. Assoc. Bull. 10: 164, Table 1.
Simpsonella sp. — Bolotov et al. (2024)
‘Haas, 1930’ Ramírez et al., 2003. Rev. Biol. Trop. 51: 273. [nomen nudum]
Anodontites weirauchi — Ramírez et al. (2003)
Rafinesque, 1831. Continuation: 3.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 74.
Rafinesque, 1831. Continuation: 2.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 73.
Bariosta diploderma — Simpson (1914)
Rafinesque, 1831. Continuation: 3.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 74.
(intro'd as intra-sp. of Bariosta diaphanus Rafinesque, 1831)
Rafinesque, 1831. Continuation: 3.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 74.
Rafinesque, 1831. Continuation: 2.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 73.
Schlüter, 1838. Kurzgef. Syst. Verz. Conch. Samml.: 32. [nomen nudum]
Schlüter, 1838. Kurzgef. Syst. Verz. Conch. Samml.: 33. [nomen nudum]
Schlüter, 1838. Kurzgef. Syst. Verz. Conch. Samml.: 33. [nomen nudum]
Rafinesque, 1831. Continuation: 6.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 83.
Diplasma marginata — Frierson (1914)
Rafinesque, 1831. Continuation: 6.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 83.
Rafinesque, 1831. Continuation: 6.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 83.
Diplasma vitrea — Frierson (1927), Modell (1942)
Parreysia olivarius — Graf & Cummings (2006)

Marshall, in CM & USNM colls. of Authors.
Type(s): MANUSCRIPT NAME USNM_369000, Uruguay River, Nueva Palmira, Uruguay (Colonia).

Mabille, in MNHN coll. of Authors.
Type(s): MANUSCRIPT NAME MNHN_MP_0044, Tonkin.
(error for Unio rugulosus Küster, 1856)
‘Küster’ Frierson, 1927. Check List N. Amer. Naiades: 35.
Isley 1925 of Authors.
Toxolasma parvus — Howells et al. (1996)
Rafinesque, 1831. Continuation: 7.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 84.
Rafinesque, 1831. Continuation: 5.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 79.
Poli, 1795. Testacea Utriusque Siciliae 2: 253.
(misidentified reference to Unio auricularius Spengler, 1793)
Victoria et al., 2022. MOJ Public Health: 138.
‘Ben.’ Lea, 1870. Synopsis Fam. Naiades: 35. [nomen nudum]

Haas, 1910. Nachr. Bl. Dtsch. Malak. Ges. 42: 100.
Haas, 1911. Conch. Cab. 9 (pt. 2, h. 43): pl. 16, fig. 5.
Haas, 1913. Conch. Cab. 9 (pt. 2, h. 48): 161.
Type(s): HOLOTYPE SMF_3531, N. Guinea; Umg. v. Konstantinhafen ?
Microdontia ovata — Haas (1910), Haas (1913), Modell (1964)
Nodularia (s.s.) ovata — Simpson (1914)
Velesunio ovata — McMichael (1956), Bogan (2010)
Velesunio ovatus — McMichael & Hiscock (1958), Haas (1969)
Velesunio ovata [sic] — Graf & Cummings (2007)
Graf & Cummings, 2012. Mussel Proj.: ??. [nomen nudum]
(misidentified reference to Mya nodulosa Wood, 1815)
Wood, 1815. Gen. Conch. 1: 106, pl. 22, figs. 3-4. [in part]
Unio (sec. Lymnium) pictorum — Simpson (1900)
Unio (sec. Lymnium) (Group Unio pictorum) pictorum — Simpson (1914)
‘S.’ Lightfoot, 1786. Catalogue of the Portland Museum: 100, no. 2190. [nomen nudum]
Unio obovata — Simpson (1914)
‘S.’ Lightfoot, 1786. Catalogue of the Portland Museum: 134, no. 2983. [nomen nudum]
‘Mich.’ Schlüter, 1838. Kurzgef. Syst. Verz. Conch. Samml.: 33. [nomen nudum]
Schlüter, 1838. Kurzgef. Syst. Verz. Conch. Samml.: 32. [nomen nudum]
Schlüter, 1838. Kurzgef. Syst. Verz. Conch. Samml.: 32. [nomen nudum]
Swainson, 1840. Treat. Malacol.: 279. [nomen nudum]
Turton, 1822. Conch. Ins. Brit.: 115.
Schrött. of Authors.
‘Charmes’ Kobelt, 1910. Abh. Senckenb. Naturf. Ges. 32: 85. [nomen nudum]
Nodularia (Coelatura) radiata — Kobelt (1910)
Rafinesque, 1831. Continuation: 4.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 76.
Rafinesque, 1831. Continuation: 4.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 76.
Rafinesque, 1820. Ann. Gén. Sci. Phys. 5 (13): 321 [also as ‘Unio cliffordiana’].
Rafinesque, 1864. [in] Binney & Tryon, reprint: 63.
Obliquaria cliffordiana — Burch (1975)
Rafinesque, 1831. Continuation: 3.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 76.
Rafinesque, 1831. Continuation: 3.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 76.
Schumacher, 1815. Overs. Dansk. Vid. Selsk. Forhandl. Kjobehhaven 1813-1815: 7. [nomen nudum]
Rafinesque, 1818. Amer. Mon. Mag. 3: 355. [nomen nudum]
Rafinesque, 1819. Jour. Phys. Chim. Hist. Nat. 88: 426 [as ‘U. (Proptera) phaiedra’]. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 22, 29.
(error for Pseudohyria gobiensis McNeil in Morris, 1936)
‘McNeil’ Modell, 1964. Arch. Moll. 93: 108.
(new name for Unio rusticus Sowerby, 1868)
‘Lea’ Sowerby, 1868. Conch. Icon. 16: pl. 64, sp. 324; errata [as ‘Unio rusticus’].
Frierson, 1927. Check List N. Amer. Naiades: 63, sp. 273.
Type(s): TYPE LOST BMNH_XXX, Siam.
Psoronaias plexoideus — Frierson (1927)
Elliptio (Barynaias) plexoideus — Haas (1930)
Barynaias plexus — Haas (1969)

Iredale, 1934. Austral. Zool. 8: 72, pl. 5, fig. 9; pl. 6, fig. 8.
Iredale, 1943. Austral. Zool. 10: 190.
Type(s): HOLOTYPE AMS_484, Bloomfield River, Queensland, Australia [-15.95, 145.333 ± 10 km].
Rugoshyria aquilonalis — Iredale (1934), Iredale (1943)
Hyridella aquilonalis — McMichael & Hiscock (1958)

Iredale, 1934. Austral. Zool. 8: 72, pl. 5, fig. 8; pl. 6, fig. 9.
Iredale, 1943. Austral. Zool. 10: 190.
Type(s): HOLOTYPE (ORIG. DESIG.) AMS_61949, Mary River at Kenilworth, N of Brisbane, Queensland, Australia [-26.6, 152.733 ± 10 km].
Rugoshyria interserta — Iredale (1934), Iredale (1943)
Hyridella interserta — McMichael & Hiscock (1958)
Makhan & Hawkeswood, 2026. Calodema 1156: 2, figs. 5-7.
Schlüter, 1838. Kurzgef. Syst. Verz. Conch. Samml.: 33. [nomen nudum]
(error for Unio taumilapanus Conrad, 1855)
‘Conrad’ Contreras-Arquieta, 2000. Mexicoa 2(1): 44.
Rafinesque, 1831. Continuation: 5.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 81.
(error for Bariosta lasmabrachys Rafinesque, 1831)
‘Rafinesque’ Ferussac, 1835. Mag. Zool. 5(59-60): 25.
Rafinesque, 1831. Continuation: 2.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 72.
Rafinesque, 1831. Continuation: 2.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 73.
(misidentified reference to Unio exolescens Gould, 1843)
‘Gould’ of Authors.
Brandt, 1974. Arch. Moll. 105: 299.
Pfeiffer & Graf, 2013. J. Moll. Studies 79: 251.
Pfeiffer & Graf, 2015. Zool. J. Linn. Soc. 175(2): [4].
Lopes-Lima et al., 2017. MPE 106: 177.
Trapezoideus exolescens — Konopleva et al. (2017)
Trapezoideus foliaceus — Bolotov et al. (2017)
Trapezoideus sp. 1 — Bolotov et al. (2017)
Physunio sp. ‘Trapezoideus’ — Bolotov et al. (2017), Bolotov et al. (2018), Huang et al. (2019), Konopleva et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020)
undescribed Contradentini sp. — Pfeiffer et al. (2021)
Rafinesque, 1831. Continuation: 4.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 77.
(homonym of Unio perplexus Say, 1829)
Rafinesque, 1831. Continuation: 4.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 76.
Bourguignat of Authors.
Conrad, 1854. Jour. Acad. Nat. Sci. 2(4): 298, pl. 27, fig. 5.
Pleurobema (s.s.) alta — Simpson (1900)
Pleurobema (s.s.) altum — Simpson (1914), Frierson (1927)
Pleurobema altum — Haas (1969), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Lydeard et al. (1999), IUCN (2000), Graf & Cummings (2007), Cummings & Graf (2010), ITIS (2012)
Pleurobema fibuloides — Williams et al. (2008)
Adami of Authors.
of Authors.

Lister, 1685. Conch.: pl. 147, fig. 3 ?. [pre-linnaean]
Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 80, sp. 42.
Type(s): HOLOTYPE MNHN_MPL_0032, Habite..... Mus. n°.
Unio angusta — Simpson (1914)
‘Phl.’ of Authors.
Anton, 1839. Verz. Conchylien: 14, sp. 545.
Servain of Authors.
Parr. of Authors.
Rafinesque, 1831. Continuation: 4. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 77.
Bourguignat of Authors.
(misidentified reference to Unio baudoni Folin & Bérillon, 1874)
‘Drouet’ Kobelt, 1879. Icon. Land- und Süssw.-Moll. 6: 43, pl. 163, fig. 1646.
Galland of Authors.
Bourguignat of Authors.
‘Ziegler. Potier’ Lea, 1852. Synopsis Fam. Naiades: 39. [nomen nudum]
‘Ziegler. Potier’ Lea, 1870. Synopsis Fam. Naiades: 63. [nomen nudum]

Haas, 1930. Senckenbergiana 12(1): 7, figs. 6-7.
Type(s): TYPE SMF_3657, Hunan, M. China.
Drouët, 1892. J. de Conch. 40: 89.
‘Charpentier mss.’ Küster, 1856. Conchyl. Cab. 9(2): 155, pl. 44, fig. 6.
Type(s): TYPE LOST XXX_UNKNOWN, Mexiko.
Unio (sec. Elliptio) coloratus — Simpson (1900)
Unio (Simonaias) cuprinus var. coloratus — Martens (1900)
Unio (sec. Elliptio) (Group of Unio coloratus) coloratus — Simpson (1914)
Elliptio (Sphenonaias) coloratus — Frierson (1927)
Nephronaias (Sphenonaias) colorata — Haas (1969)
Sphenonaias colorata — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Bruguière, 1797. Encycl. Méth. 2: pl. 249, fig. 3 [as Unio sp.].
‘Val.’ Bory de St. Vincent, 1827. Encycl. Méth. 2: 151.
‘Sow. Flem.’ of Authors.
Rafinesque, 1819. Jour. Phys. Chim. Hist. Nat. 88: 427. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 29.
Locard of Authors.
(misidentified reference to Unio cornutus Barnes, 1823)
Lea 1827 of Authors.
Dysnomia (s.s.) flexuosa — Frierson (1927)
Dysnomia (Torulosa) torulosa — Frierson (1927)
Rafinesque, 1819. Jour. Phys. Chim. Hist. Nat. 88: 427. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 29.
‘Sow. Flem.’ of Authors.
Rafinesque, 1831. Continuation: 4. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 77.
Jay, 1835. Cat. Rec. Shells: 16. [nomen nudum]
Mabille of Authors.
Parreys of Authors.
Bourguignat of Authors.
Rafinesque, 1831. Continuation: 4. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 77.
‘Jays’s Cat.’ Lea, 1852. Synopsis Fam. Naiades: 39. [nomen nudum]
‘Jays’s Cat.’ Lea, 1870. Synopsis Fam. Naiades: 63.
Letourneux in Bourguignat, 1883. Aperçu Unionid. Pénins. Ital.: 30.
Kobelt of Authors.
Vid. of Authors.

Lea, 1859. Proc. Acad. Nat. Sci. 11: 152.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 7]: 250 [68], pl. 39, fig. 130.
Type(s): HOLOTYPE (MONOTYPY) BMNH_1965169, Hab._? [Asia ?].
Nodularia (s.s.) fluctiger — Simpson (1900)
Nodularia (sec. Scabies) fluctigera — Haas (1911)
Nodularia (s.s.) fluctigera — Simpson (1914)
Diplodon fluctiger — Haas (1919), Simone (2006), Graf & Cummings (2007), Graf & Cummings (2009), Bogan (2010)
Nodularia (Scabies) fluctigera — Haas (1924)
Diplodon guaranianus fluctiger — Haas (1930)
Ecuadorea fluctiger — Modell (1950)
Diplodon (s.s.) guaranianus fluctiger — Haas (1969)
Schröter, 1779. Gesch. Flußconch.: 181, pl. 9, fig. 1. [non-binomial]
Mørch, 1868. Amer. J. Conch. 4: 38.
Lamellidens (s.s.) marginalis — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915)
Bourguignat of Authors.
‘Sow. Flem.’ of Authors.
(intro'd as intra-sp. of Unio plenus Lea, 1840)
de Gregorio, 1914. Il Nat. Siciliano 2: 48.
Unio plenus var. interduos — de Gregorio (1914)
Conrad, 1838. Monogr. Fam. Unionidae 2(11): back cover.
Unio iridescens — Simpson (1914)
Locard, in coll. MNHN of Authors.
Servain, 1888. Bull. Soc. Malac. France 5: 317. [nomen nudum]
Rafinesque of Authors.
‘Sow. Flem.’ of Authors.
(error for Unio (s.s.) longedentatus Anton, 1839)
‘Anton’ Lea, 1870. Synopsis Fam. Naiades: 63.
(error for Unio (s.s.) longedentatus Anton, 1839)
‘Anton’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 862.
‘Anton’ Simpson, 1914. Descr. Cat. Naiades: 1193.
Sganzin, 1841. Mém. Soc. Hist. Nat. Strasbourg 3: 8.
Unio madagascariensis — Kobelt (1910), Fischer-Piette & Vukadinovic (1973), IUCN (2016)
Caelatura [sic] madagascariensis — Haas (1969)
Coelatura madagascariensis — Daget (1998), Graf & Cummings (2007), Bogan (2010)
Bourguignat in Servain, 1888. Bull. Soc. Malac. France 5: 317. [nomen nudum]

Germain, 1911. Bull. Mus. Nation. Hist. Natur. 17: 139, pl. 1, figs. 3-5.
Germain, 1918. Bull. Mus. Nation. Hist. Natur. 24: 36.
Type(s): HOLOTYPE MNHN_20832, Madagascar.
Unio malgachensis — Germain (1911), Simpson (1914), IUCN (2016)
Caelatura [sic] geayi — Haas (1969)
Caelatura [sic] malgachensis — Fischer-Piette & Vukadinovic (1973)
Coelatura malgachensis — Daget (1998), Graf & Cummings (2007)
‘Bourguignat’ of Authors.
Adami of Authors.

Lea, 1859. Proc. Acad. Nat. Sci. 11: 152.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 7]: 250 [68], pl. 38, fig. 129.
Type(s): HOLOTYPE (MONOTYPY) BMNH_1965175, Hab._?
Nephronaias melleus — Simpson (1900), Frierson (1917)
Nephronaias (Group of Nephronaias scamnata) mellea — Simpson (1914)
Elliptio (Nephronaias) melleus — Frierson (1927)
Nephronaias (s.s.) mellea — Haas (1969)
Nephronaias mellea — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Philippi, 1847. Zeitschr. f. Malakozool. 4(6): 95.
Philippi, 1849. Abbild. Beschr. Conch. 4: 28, pl. 6, fig. 3.
Type(s): TYPE LOST XXX_UNKNOWN, México.
Unio (sec. Elliptio) mexicanus — Simpson (1900)
Unio (Elliptio) mexicanus — Martens (1900)
Unio (sec. Elliptio) (Group of Unio coloratus) mexicanus — Simpson (1914)
Elliptio (Sphenonaias) mexicanus — Frierson (1927)
Elliptio (Nephronaias) mexicanus — Haas (1929)
Nephronaias (Sphenonaias) mexicana — Haas (1969)
Sphenonaias mexicana — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Bourguignat of Authors.
‘Jays’s Cat.’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Jays’s Cat.’ Lea, 1870. Synopsis Fam. Naiades: 63. [nomen nudum]
(misidentified reference to Unio mutabilis Lea, 1859)
‘Lea’ Hedley & Musson, 1891. unknown publication: 564.
Hyridella interserta — McMichael & Hiscock (1958)
‘Fer.’ Lea, 1836. Synopsis Fam. Naiades: 41. [nomen nudum]
‘Fer.’ Lea, 1838. Synopsis Fam. Naiades: 26. [nomen nudum]
‘Fer.’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Fer.’ Lea, 1870. Synopsis Fam. Naiades: 63. [nomen nudum]
‘Potier and Michaud’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Potier and Michaud’ Lea, 1870. Synopsis Fam. Naiades: 63. [nomen nudum]
Bourguignat of Authors.
Mørch, 1853. Cat. Conch. Yoldi 2: 44. [nomen nudum]

Lea, 1852. Proc. Amer. Phil. Soc. 5: 252. [nomen nudum]
Lea, 1852. Trans. Amer. Phil. Soc. 10 [O. 5]: 275 [31], pl. 22, fig. 33.
Type(s): HOLOTYPE USNM_85073, Columbia R., Oregon.
Nephronaias oregonensis — Simpson (1900), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
Nephronaias (Group of Nephronaias macnielii) oregonensis — Simpson (1914)
Elliptio (Nephronaias) oregonensis — Frierson (1927)
Nephronaias (s.s.) oregonensis — Haas (1969)
‘Fer.’ Lea, 1836. Synopsis Fam. Naiades: 41. [nomen nudum]
‘Fer.’ Lea, 1838. Synopsis Fam. Naiades: 26. [nomen nudum]
‘Fer,’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Fer,’ Lea, 1870. Synopsis Fam. Naiades: 63. [nomen nudum]
Rafinesque, 1819. Jour. Phys. Chim. Hist. Nat. 88: 427. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 29.
(misidentified reference to Unio ovata Lamarck, 1819)
‘Lam.’ Stark, 1828. Elements Nat. Hist. 2: 90.
Rafinesque of Authors.
Drouët, 1882. Unionidae de Serbie: 17.
Rafinesque, 1832. Atl. Jour. 1(4): 154.
Rafinesque, 1864. [in] Binney & Tryon, reprint: 92.
Anodontites paphos — Simpson (1914), Simone (2006)
Diplodon paphos — Simone (2006)
(error for Unio pequottinus Linsley, 1845)
‘Linsley’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 744.
‘Linsley’ Simpson, 1914. Descr. Cat. Naiades: 731.
Linsley, 1845. Amer. J. Sci. 48(2): 277. [nomen nudum]
Unio pequottianus [sic] — Simpson (1914)
Servain, 1888. Bull. Soc. Malac. France 5: 318.
‘Phil.’ of Authors.
‘Lea’ B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [4]. [nomen nudum]
Bourguignat of Authors.
Villa, 1841. Dispos. Syst. Conchyl.: 62.
Unio plombarius — Simpson (1914)
‘Fer.’ Lea, 1836. Synopsis Fam. Naiades: 41. [nomen nudum]
‘Fer.’ Lea, 1838. Synopsis Fam. Naiades: 26. [nomen nudum]
‘Fer.’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Fer.’ Lea, 1870. Synopsis Fam. Naiades: 64. [nomen nudum]
‘Zeig.’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Zeig.’ Lea, 1870. Synopsis Fam. Naiades: 64. [nomen nudum]
‘Fer.’ Lea, 1836. Synopsis Fam. Naiades: 41. [nomen nudum]
‘Fer.’ Lea, 1838. Synopsis Fam. Naiades: 26.
‘Fer.’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Fer.’ Lea, 1870. Synopsis Fam. Naiades: 64. [nomen nudum]
Rafinesque, 1831. Continuation: 4. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 77.
(error for Unio purpuriatus Say, 1831)
‘Say’ Küster, 1861. Conchyl. Cab. 9(2): 162.
Say, 1831. New Harm. Dissem. 1(29): [no pagination].
Say, 1858. [in] Binney, Compl. Writings T. Say: 133.
Type(s): TYPE LOST XXX_UNKNOWN, México....in a stream a few leagues from Vera‑Cruz.
Nephronaias medellinus — Simpson (1900)
Unio (Elliptio) medellinus — Martens (1900)
Nephronaias (Group of Nephronaias medellina) medellina — Simpson (1914)
Unio purpuriatus — Simpson (1914)
Lampsilis (Disconaias) purpuriata — Frierson (1927), Haas (1929), Haas (1969)
Disconaias purpuriata — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Rafinesque, 1831. Continuation: 4. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 77.
(homonym of Unio rugosa Poiret, 1801)
Anton, 1839. Verz. Conchylien: 14, sp. 546.
(homonym of Unio rugulosus Wood, 1828)
‘Charpentier mss.’ Küster, 1856. Conchyl. Cab. 9(2): 154, pl. 44, fig. 5.
Type(s): TYPE LOST XXX_UNKNOWN, Neuholland.
Nephronaias rugulosus — Simpson (1900)
Unio (Simonaias) dysoni — Martens (1900)
Nephronaias tabascoensis — Ihering (1901)
Nephronaias (Group of Nephronaias scamnata) rugulosa — Simpson (1914)
Elliptio (Nephronaias) rugolosus [sic] — Frierson (1927)
Elliptio (Nephronaias) rugulosa — Haas (1929)
Nephronaias (s.s.) rugulosa — Haas (1969)
Nephronaias rugulosa — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
(homonym of Unio rusticus Lea, 1856; renamed Psoronaias plexoideus Frierson, 1927)
‘Lea’ Sowerby, 1868. Conch. Icon. 16: pl. 64, sp. 324; errata.
Type(s): TYPE LOST BMNH_XXX, Siam.
Unio (sec. Elliptio) crocodilarum [sic] — Simpson (1900)
Unio (sec. Elliptio) (Group of Unio semigranosus) crocodilarum [sic] — Simpson (1914)
Psoronaias plexoideus — Frierson (1927)
Barynaias plexus — Haas (1969)
Castro of Authors.
Rafinesque, 1831. Continuation: 4. [nomen nudum]
Rafinesque, 1864. [in] Binney & Tryon, reprint: 77.
Bourguignat of Authors.
‘Gass.’ Lea, 1870. Synopsis Fam. Naiades: 64. [nomen nudum]
‘Charpentier mss.’ Küster, 1856. Conchyl. Cab. 9(2): 152, pl. 44, fig. 2.
Diplodon (Hyridella s.s.) australis — Simpson (1900), Simpson (1914)
“Velesunio shuttleworthi” ** — Iredale (1934), Iredale (1943)
Velesunio shuttleworthi — McMichael & Hiscock (1958)

Crosse & Fischer, 1894. J. de Conch. 41: 296.
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(16): 617, pl. 66, fig. 2-2a.
Type(s): HOLOTYPE (MONOTYPY) MNHN_IM-2000-1792, Mexique.
Unio (sec. Elliptio) sphenorhynchus — Simpson (1900)
Unio (Sphenonaias) acutirostris — Martens (1900)
Unio (sec. Elliptio) (Group of Unio pigerrimus) sphenorhynchus — Simpson (1914)
Elliptio (Nephronaias) sphenorhynchus — Frierson (1927), Haas (1929)
Nephronaias (s.s.) sphenorhynchus — Haas (1969)
Nephronaias sphenorhyncha — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Thiesse of Authors.

(intro'd as intra-sp. of Unio cuprinus Lea, 1831)
Martens, 1900. Biol. Centr.-Amer., Moll.: 506, pl. 36, figs. 1-1b.
Type(s): HOLOTYPE (MONOTYPY) ZMB_108852, Tabasco, Mexico.
Unio (Simonaias) cuprinus subventralis — Martens (1900)
Nephronaias (Group of Nephronaias scamnata) calamitarum var. subventralis — Simpson (1914)
Elliptio (Nephronaias) subventralis — Frierson (1927)
Nephronaias (Popenaias) metallica — Haas (1969)
(error for Unio tabascoensis Küster, 1856)
‘Charp.’ Küster, 1862. Conchyl. Cab. 9(2): 309.
‘Charpentier mss.’ Küster, 1856. Conchyl. Cab. 9(2): 153, pl. 44, fig. 3.
Type(s): TYPE LOST XXX_UNKNOWN, Tabasco in Mexiko.
Nephronaias tabascoensis — Simpson (1900), Ihering (1901), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Unio (Simonaias) cuprinus var. tabascoensis — Martens (1900)
Nephronaias (Group of Nephronaias scamnata) tabascoensis — Simpson (1914)
Elliptio (Nephronaias) tabascoensis — Frierson (1927), Haas (1929)
Nephronaias (s.s.) tabascoensis — Haas (1969)
(new name for Unio taumilapanus Conrad, 1855)
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(16): 621.
Unio taumilapanus — Simpson (1914)
Elliptio (Barynaias) tamaulipasensis — Frierson (1927)
Nephronaias (Sphenonaias) taumilapana — Haas (1969)
Quincuncina mitchelli — Howells et al. (1996), R.I. Johnson (1999)
Servain of Authors.
(renamed Unio tamaulipasensis Fischer & Crosse, 1894)
Conrad, 1855. Proc. Acad. Nat. Sci. 7: 256.
Type(s): TYPE LOST XXX_UNKNOWN, San Juan River, Taumilapas.
Unio taumilapanus — Simpson (1914)
Elliptio (Barynaias) tamaulipasensis — Frierson (1927)
Nephronaias (Sphenonaias) taumilapana — Haas (1969)
Quincuncina mitchelli — Howells et al. (1996), R.I. Johnson (1999)
Sphenonaias tanualipana [sic] — Contreras-Arquieta (2000)
Sphenonaias taumilapana — Graf & Cummings (2007), Bogan (2010), Cummings & Graf (2010), Pfeiffer et al. (2016), Czaja et al. (2023)
Sphenonaias taumilapanus — Smith et al. (2020)
(error for Unio taumilapanus Conrad, 1855)
‘Conrad’ R.I. Johnson, 1999. Occ. Pap. Moll. 6(77): 19.
‘Potier’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Potier’ Lea, 1870. Synopsis Fam. Naiades: 64. [nomen nudum]
(error for Unio tumulatus Morton, 1836)
‘Morton’ Lea, 1838. Synopsis Fam. Naiades: 26.
‘Sow. Flem.’ of Authors.
Servain, 1888. Bull. Soc. Malac. France 5: 317. [nomen nudum]
Bourguignat, 1883. Aperçu Unionid. Pénins. Ital.: 28.

Morelet, 1845. Moll. Terr. Fluv. Portugal: 105, pl. 13, fig. 1.
Type(s): HOLOTYPE BMNH_93-2-4-1964, les eaux de la Vallèe du Tage, entre Villa-Nova et Azumbuja [Portugal].
Unio (sec. Lymnium) batavus — Simpson (1900)
Unio (sec. Lymnium) (Group Unio littoralis) batavus — Simpson (1914)
Diplodon parallelipipedon [sic] — Haas (1940)
‘Locard’ Rochebrune, 1903. Bull. Mus. Nation. Hist. Natur. 9: 390.
Unio yliscerus — Rochebrune (1903)
‘Gray’ Paetel, 1890. Cat. Conch.-Samml. 3: 172. [nomen nudum]
Diplodon zealandicus — Simpson (1914)
‘Stenz. Potier’ Lea, 1852. Synopsis Fam. Naiades: 40. [nomen nudum]
‘Stenz. Potier’ Lea, 1870. Synopsis Fam. Naiades: 64. [nomen nudum]