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Data last updated
Tue 05 May 2026
Publication Frierson (1927): species taxonomic opinions
Full Citation
Frierson, L.S. 1927. A Classified and Annotated Check List of the North American Naiades. 111 pp. https://babel.hathitrust.org/cgi/pt?id=coo.31924002812125&view=1up&seq=3.
Taxonomic Opinions
Alasmidonta (Bullella) arcula (Lea, 1838) = Alasmidonta arcula
Alasmidonta (Pressodonta) calceola (Lea, 1828) = Sulcularia viridis
+ Margaritana deltoidea Lea, 1838
+ Alasmodonta truncata Conrad, 1834
+ Alasmidonta marginata Say, 1834
Alasmidonta (Pressodonta) calceola-minor (Lea, 1845) = Sulcularia viridis
Alasmidonta (Prolasmidonta) heterodon (Lea, 1829) = Prolasmidonta heterodon
Alasmidonta (s.s.) triangulata (Lea, 1858) = Alasmidonta triangulata
Alasmidonta (s.s.) undulata (Say, 1817) = Alasmidonta undulata
+ Alasmodonta sculptilis Say, 1829
+ Unio hians Valenciennes, 1827
Alasmidonta (s.s.) undulata-mytiloides (Swainson, 1840) = Alasmidonta undulata
+ Uniopsis radiata Swainson, 1840
+ Unio swainsoni Sowerby, 1868
Alasmidonta (Sulcularia) badia (Rafinesque, 1831) = Sulcularia viridis + Alasminota holstonia + Alasminota etowaensis
+ Margaritana holstonia Lea, 1838
+ Margaritana etowaensis Conrad, 1849
+ Margaritana georgiana Lea, 1859
+ Margaritana etowahensis Lea, 1858
+ Alasmodonta impressa J.G. Anthony, 1865
+ Unio holstonianus Sowerby, 1868
Alasmidonta (Sulcularia) diversa (Conrad, 1856) = Sulcularia viridis
Amblema (Megalonaias) gigantea (Barnes, 1823) = Megalonaias nervosa + Amblema plicata
+ Unio undulatus Barnes, 1823
+ Unio heros Say, 1829
+ Unio multiplicatus Lea, 1831
+ Unio eightsii Lea, 1860
+ Unio atrocostatus Reeve, 1864
Amblema (Megalonaias) gigantea-boykiniana (Lea, 1840) = Megalonaias nervosa
Amblema (Megalonaias) nickliniana (Lea, 1834) = Megalonaias nickliniana
Amblema (Megalonaias) nickliniana-digitata (Morelet, 1851) = Megalonaias nickliniana
+ Unio (Crenodonta) stolli Martens, 1900
Amblema (Megalonaias) triumphans (Wright, B.H., 1898) = Megalonaias nervosa
Amblema (Plectomerus) dombeyana (Valenciennes, 1827) = Plectomerus dombeyanus
+ Unio crassidens Lamarck, 1819
+ Bariosta ponderosus Rafinesque, 1831
+ Unio interruptus Say, 1831
+ Unio trapezoides Lea, 1831
+ Quadrula trapezoides var. pentagonoides Frierson, 1902
Amblema (s.s.) plicata (Say, 1819) = Amblema plicata
+ Unio rariplicata Lamarck, 1819
+ Unio peruviana Lamarck, 1819
+ Unio heros Küster, 1855
Amblema (s.s.) plicata-costata Rafinesque, 1820 = Amblema plicata + Megalonaias nervosa
+ Unio latecostatus Lea, 1845
+ Unio atrocostatus Sowerby, 1868
Amblema (s.s.) plicata-elliottii (Lea, 1856) = Amblema elliottii
Amblema (s.s.) plicata-neisleri (Lea, 1858) = Amblema neislerii
Amblema (s.s.) plicata-perplicata (Conrad, 1841) = Amblema plicata
+ Unio atrocostatus Lea, 1845
+ Unio brazosensis Lea, 1868
+ Unio pearlensis Conrad, 1855
+ Unio lincecumii Lea, 1868
+ Unio pauciplicatus Lea, 1872
+ Unio perlensis ‘Conrad’ of Authors
Amblema (s.s.) plicata-pilsbryi (Marsh, 1891) = Amblema plicata
Amblema (s.s.) plicata-quintardi (Cragin, 1887) = Amblema plicata
Amblema (s.s.) plicata-southalli (Marshall, 1916) = Amblema plicata
Anodonta (Anodontoides) birgei (Baker, F.C., 1923) = Anodontoides ferussacianus
Anodonta (Anodontoides) ferussaciana Lea, 1834 = Anodontoides ferussacianus + Anodontoides denigratus + Pyganodon grandis
+ Anodonta ferruginea Lea, 1840
+ Anodonta argentea Lea, 1840
+ Anodonta denigrata Lea, 1852
+ Anodonta oblita Lea, 1852
+ Anodonta buchanensis Lea, 1838
+ Anodonta simpsoniana Lea, 1861
+ Anodon plicatus Haldeman, 1842
Anodonta (Arnoldina) dejecta Lewis, 1875 = Brachyanodon californiensis
+ Anodonta mearnsiana Simpson, 1893
Anodonta (Lastena) couperiana Lea, 1840 = Utterbackiana couperiana
+ Anodonta cowperiana Lea, 1840
Anodonta (Lastena) ohiensis Rafinesque, 1820 = Utterbackia imbecillis
+ Anodonta imbecillis Say, 1829
+ Anodonta incerta Lea, 1834
+ Anodonta henryana Lea, 1857
Anodonta (Lastena) ohiensis Rafinesque, 1820 = Potamilus ohiensis
Anodonta (Lastena) ohiensis-horda Gould, 1855 = Utterbackia imbecillis + Pyganodon fragilis
+ Anodon hordeum Sowerby, 1867
Anodonta (Pyganodon) cataracta Say, 1817 = Pyganodon cataracta
+ Anodonta (s.s.) atra Rafinesque, 1820
+ Anodonta fluviatilis ‘Gmelin’ of Authors
+ Anodonta teres Conrad, 1834
+ Anodonta virgulata Lea, 1857
+ Anodonta williamsii Lea, 1862
+ Anodonta tryonii Lea, 1862
+ Anodonta dolearis Lea, 1863
+ Anodonta doliaris Lea, 1863
Anodonta (Pyganodon) cataracta-gibbosa Say, 1825 = Pyganodon gibbosa + Pyganodon cataracta
+ Anodonta dariensis Lea, 1858
Anodonta (Pyganodon) cataracta-hallenbeckii Lea, 1858 = Pseudodontoideus connasaugaensis + Pyganodon grandis
+ Anodonta gesnerii Lea, 1858
Anodonta (Pyganodon) grandis Say, 1829 = Pyganodon grandis
+ Anodonta inflata Rafinesque, 1831
+ Anodonta gigantea Lea, 1838
+ Anodonta corpulenta Cooper, 1834
+ Anodonta stewartiana Lea, 1834
+ Anodonta virens Lea, 1852
+ Anodonta linnaeana Lea, 1852
+ Anodonta opaca Lea, 1852
Anodonta (Pyganodon) grandis-bealei Lea, 1863 = Pyganodon grandis
Anodonta (Pyganodon) grandis-benedictensis (Lea, 1834) = Pyganodon grandis
+ Margaron (Anodonta) benedictii Lea, 1870
Anodonta (Pyganodon) grandis-dakota Frierson, 1910 = Pyganodon grandis
Anodonta (Pyganodon) grandis-dakotana Utterback, 1915 = Pyganodon grandis
Anodonta (Pyganodon) grandis-globosa Lea, 1841 = Pyganodon globosa
+ Anodon nopalatensis Sowerby, 1867
Anodonta (Pyganodon) grandis-grijalvae Morelet, 1884 = Pyganodon globosa
Anodonta (Pyganodon) grandis-lugubris Say, 1829 = Pyganodon grandis + Brachyanodon californiensis
+ Anodonta plana Lea, 1834
+ Anodonta declivis Conrad, 1834
+ Anodonta decora Lea, 1838
+ Anodonta ovata Lea, 1838
+ Anodonta footiana Lea, 1840
+ Anodonta maryattana Lea, 1840
+ Anodonta harpethensis Lea, 1840
+ Anodonta leonensis Lea, 1862
+ Anodonta texasensis Lea, 1859
+ Anodonta danielsii Lea, 1858
8 more...
Anodonta (Pyganodon) grandis-pepiniana Lea, 1838 = Pyganodon grandis
+ Anodonta dallasiana Lea, 1863
+ Anodonta kennicottii Lea, 1861
+ Anodon opalina J.G. Anthony, 1865
+ Anodonta houghtonensis Currier in DeCamp, 1881
Anodonta (Pyganodon) grandis-tabascensis Morelet, 1884 = Pyganodon globosa
+ Anodonta tabascoensis Simpson, 1900
Anodonta (Pyganodon) implicata Say, 1829 = Utterbackiana implicata + Pyganodon cataracta
+ Anodonta newtonensis Lea, 1838
+ Anodonta housatonica Gould, 1848
+ Anodonta excurvata De Kay, 1843
Anodonta (s.s.) beringiana Middendorff, 1851 = Beringiana beringiana
+ Anodonta youkanensis Lea, 1867
+ Anodonta youconensis Lea, 1867
Anodonta (s.s.) impura Say, 1829 = Brachyanodon impura
+ Unio (Anodonta) coarctata Anton, 1839
+ Anodonta chalcoensis Crosse & Fischer, 1893
+ Anodonta chapalensis Crosse & Fischer, 1893
+ Anodonta exilior Lea, 1871
+ Anodon glabrus Sowerby, 1870
+ Anodonta viridana Clessin, 1876
+ Glabaris glabrus Frierson, 1927
Anodonta (s.s.) kennerlyi Lea, 1860 = Brachyanodon kennerlyi
Anodonta (s.s.) lurulenta Morelet, 1849 = Anodontites lurulenta
Anodonta (s.s.) marginata Say, 1817 = Pyganodon cataracta + Pyganodon fragilis + Pyganodon lacustris
+ Anodonta fragilis Lamarck, 1819
+ Anodonta lacustris Lea, 1857
+ Anodon flava J.G. Anthony, 1865
+ Anodon glandulosa J.G. Anthony, 1865
+ Anodon pallida J.G. Anthony, 1865
+ Anodon irisans J.G. Anthony, 1865
+ Anodonta subcarinata Currier, 1867
+ Anodon pholadiformis Sowerby, 1870
+ Anodon exilis Sowerby, 1870
+ Anodon subcylindracea Sowerby, 1867
Anodonta (s.s.) oregonensis Lea, 1838 = Brachyanodon oregonensis
+ Anodon cognata Gould, 1850
Anodonta (s.s.) richardsoni Martens, 1900 = Brachyanodon impura
Anodonta (s.s.) wahlamatensis Lea, 1838 = Brachyanodon nuttalliana
+ Anodonta wahlametensis ‘Lea’ of Authors
+ Anodonta nuttalliana Lea, 1838
+ Anodon rostratus Sowerby, 1867
+ Anodonta laosensis Fischer, 1891
+ Anodonta rotundovata Trask, 1854
+ Anodonta triangularis Trask, 1854
+ Anodonta nuttalliana var. idahoensis Hemphill, 1891
Anodontites cylindracea (Lea, 1838)
+ Anodon bambousearum Morelet, 1851
+ Anodonta strebelii Lea, 1868
Anodontites depexa (von Martens, 1900) = Anodontites tehuantepecensis
Anodontites jaliscoensis (Pilsbry, 1920)
Anodontites montezuma (Lea, 1841)
+ Anodonta inaequivalva Lea, 1868
+ Anodonta lenticularis Lea, 1868
+ Anodon montezianus Sowerby, 1870
Anodontites tehuantepecensis (Crosse & Fischer, 1894)
Anodontites tortilis (Lea, 1852) = Anodontites tortilis + Anodontites schomburgiana
+ Anodonta luteola Lea, 1858
+ Anodon schomburgianus Sowerby, 1870
Arcidens confragosa (Say, 1829) = Arcidens confragosus
Arkansia wheeleri Ortmann & Walker, 1912 = Arcidens wheeleri
Arotonaias cyrenoides (Philippi, 1847)
+ Unio sagrinatus Sowerby, 1868
+ Unio newcombianus Lea, 1856
+ Unio gabbianus Martens, 1900
Arotonaias gabbiana (Lea, 1868)
+ Unio nicaraguensis Lea, 1868
Arotonaias imbricata (Mörch, 1861) = Arotonaias encarpa
+ Unio encarpus Lea, 1868
Canthyria collina (Conrad, 1836) = Parvaspina collina
Canthyria spinosa (Lea, 1838) = Elliptio spinosa
Carunculina glans (Lea, 1831) = Toxolasma glans + Toxolasma lividum
+ Toxolasma lividus Rafinesque, 1831
+ Unio maestus ‘Lea’ of Authors
+ Unio moestus Lea, 1841
Carunculina glans-corvuncula (Lea, 1868) = Toxolasma corvunculus + Toxolasma pullus
+ Unio pullus Conrad, 1838
Carunculina glans-cylindrella (Lea, 1868) = Toxolasma cylindrellus
Carunculina minor (Lea, 1843) = Toxolasma paulum
Carunculina parva (Barnes, 1823) = Toxolasma parvum
Carunculina parva-compressa (Simpson, 1900) = Toxolasma texasiense
Carunculina parva-haleiana (Lea, 1843) = Leaunio lienosus
Carunculina parva-mearnsi (Simpson, 1900) = Toxolasma texasiense
Carunculina parva-texasensis (Lea, 1857) = Toxolasma texasiense
+ Unio bairdianus Lea, 1857
+ Unio bealei Lea, 1862
Carunculina paula (Lea, 1840) = Toxolasma paulum + Toxolasma germanum
+ Unio germanus Lea, 1861
+ Unio cromwellii Lea, 1865
+ Unio marginis Lea, 1865
Cumberlandia monodonta (Say, 1829)
+ Unio soleniformis Lea, 1831
Cyprogenia stegaria (Rafinesque, 1820)
+ Unio verrucosus albus Hildreth, 1828
+ Unio irroratus Lea, 1828
Cyprogenia stegaria-pusilla Simpson, 1900 = Cyprogenia stegaria
Decurambis marginata (Say, 1818) = Alasmidonta marginata + Alasmidonta varicosa
+ Decurambis scriptum Rafinesque, 1831
+ Alasmodon corrugata De Kay, 1843
+ Alasmodonta truncata ‘Say, in lit.’ of Authors
+ Alasmidonta (Decurambis) marginata susquehannae Ortmann, 1919
Decurambis marginata-atropurpureum Rafinesque, 1831 = Alasmidonta atropurpurea + Alasmidonta raveneliana
+ Margaritana raveneliana Lea, 1834
+ Unio swananoensis Hanley, 1843
Decurambis marginata-varicosa (Lamarck, 1819) = Alasmidonta varicosa
+ Alasmodon marginata De Kay, 1843
Diplasma vitrea Rafinesque = Indonaia olivaria
+ Unio olivarius Lea, 1831
Dromus dromas (Lea, 1834)
Dromus dromas-caperatus (Lea, 1845) = Dromus dromas
+ Unio abacoides Haldeman, 1846
Dysnomia (Capsaeformis) capsaeformis (Lea, 1834) = Epioblasma capsaeformis
Dysnomia (Capsaeformis) florentina (Lea, 1857) = Epioblasma florentina
+ Unio sacculus Reeve, 1864
+ Unio saccatus Küster, 1862
Dysnomia (Capsaeformis) florentina-curtisi (Utterback, 1915) = Epioblasma curtisii
Dysnomia (Capsaeformis) lefevrei (Utterback, 1915) = Epioblasma turgidula
Dysnomia (Capsaeformis) turgidula (Lea, 1858) = Epioblasma turgidula
+ Unio deviatus Reeve, 1864
Dysnomia (Capsaeformis) walkeri (Wilson & Clark, 1914) = Epioblasma walkeri
Dysnomia (Penita) arcaeformis (Lea, 1831) = Epioblasma arcaeformis + Truncilla truncata
+ Unio nexus Say, 1831
+ Truncilla metaplata Rafinesque, 1831
Dysnomia (Penita) brevidens (Lea, 1831) = Epioblasma brevidens
+ Unio interruptus ‘Rafinesque’ of Authors
Dysnomia (Penita) haysiana (Lea, 1834) = Epioblasma haysiana
+ Unio sowerbianus Lea, 1834
Dysnomia (Penita) lenior (Lea, 1840) = Epioblasma lenior
+ Unio lenis Lea, 1840
Dysnomia (Penita) metastriatus (Conrad, 1838) = Epioblasma metastriata
+ Unio compactus Lea, 1859
Dysnomia (Penita) modicella (Lea, 1859) = Epioblasma othcaloogensis
Dysnomia (Penita) othcaloogensis (Lea, 1857) = Epioblasma othcaloogensis
Dysnomia (Penita) penita (Conrad, 1834) = Epioblasma penita
Dysnomia (Pilea) personata (Say, 1829) = Epioblasma personata
+ Unio pileus Lea, 1831
+ Unio capillaris Lea, 1834
Dysnomia (Pilea) sulcata (Lea, 1829) = Epioblasma obliquata + Epioblasma perobliqua
+ Unio ridibundus Say, 1829
+ Unio gibbosus var. perobliquus Conrad, 1836
+ Unio obliquatus ‘Rafinesque’ of Authors
Dysnomia (Pilea) sulcata-pectita (Conrad, 1853) = Epioblasma obliquata + Epioblasma rangiana
+ Truncilla (Scalenaria) sulcata var. delicata Simpson, 1900
Dysnomia (s.s.) flexuosa (Rafinesque, 1820) = Epioblasma flexuosa
+ Unio cornutus Lea 1827 of Authors
+ Unio foliatus Hildreth, 1828
Dysnomia (s.s.) lewisi (Walker, 1910) = Epioblasma lewisii
Dysnomia (s.s.) stewardsoni (Lea, 1852) = Epioblasma stewardsonii
Dysnomia (Torulosa) biemarginata (Lea, 1857) = Epioblasma biemarginata
Dysnomia (Torulosa) propinqua (Lea, 1857) = Epioblasma propinqua
Dysnomia (Torulosa) rangiana (Lea, 1838) = Epioblasma rangiana
Dysnomia (Torulosa) sampsonii (Lea, 1862) = Epioblasma sampsonii
Dysnomia (Torulosa) torulosa (Rafinesque, 1820) = Epioblasma torulosa
+ Amblema gibbosa Rafinesque, 1820
+ Unio cornutus Lea 1827 of Authors
+ Unio perplexus Lea, 1831
+ Unio obliquus Potiez & Michaud, 1844
Dysnomia (Torulosa) torulosa-gubernaculum (Reeve, 1856) = Epioblasma gubernaculum
Dysnomia (Truncillopsis) triquetra (Rafinesque, 1820) = Epioblasma triquetra
+ Unio triangularis Barnes, 1823
+ Unio formosus Lea, 1831
+ Unio cuneatus Swainson, 1823
Elliptio (Barynaias) averyi (Lea, 1859) = Nephronaias caldwellii
+ Unio caldwellii Lea, 1858
Elliptio (Barynaias) opacatus (Crosse & Fischer, 1893) = Sphenonaias opacata
Elliptio (Barynaias) pigerrimus (Crosse & Fischer, 1893) = Psoronaias crocodilorum
Elliptio (Barynaias) sallei (Crosse & Fischer, 1893) = Nephronaias sallei
Elliptio (Barynaias) sallei-grossus (von Martens, 1900) = Pachynaias spheniopsis
Elliptio (Barynaias) tamaulipasensis (Conrad, 1855) [sic] = Fusconaia mitchelli + Fusconaia iheringi
+ Unio taumilapanus Conrad, 1855
+ Unio mitchelli Simpson in Dall, 1895
+ Unio iheringi B.H. Wright, 1898
Elliptio (Barynaias) tamaulipasensis-elongatus (Simpson, 1914) = Fusconaia mitchelli
Elliptio (Elliptoideus) sloatianus (Lea, 1840) = Elliptoideus sloatianus
+ Unio atromarginatus Lea, 1840
+ Unio aratus Conrad, 1849
+ Unio plectophorus Conrad, 1849
+ Margaron (Unio) plectoforus Lea, 1852
Elliptio (Eurynaia [sic]) dilatatus (Rafinesque, 1820) = Eurynia dilatata + Elliptio arca
+ Unio nasuta Lamarck, 1819
+ Unio gibbosus Barnes, 1823
+ Obliquaria bicolor Rafinesque, 1831
+ Obliquaria violacea Rafinesque, 1831
+ Unio arctatus Ferussac, 1835
+ Unio arctior Lea, 1838
+ Unio stonensis Lea, 1840
+ Unio lazarus Sowerby, 1868
Elliptio (Eurynaia [sic]) dilatatus-arcus (Conrad, 1834) = Elliptio arca
Elliptio (Eurynaia [sic]) dilatatus-armathwaitensis (Wright, B.H., 1898) = Eurynia dilatata
Elliptio (Eurynaia [sic]) dilatatus-delicatus (Simpson, 1900) = Eurynia dilatata
Elliptio (Eurynaia [sic]) dilatatus-fulvus (Rafinesque, 1831) = Eurynia dilatata + Elliptio arca
+ Unio luridus Lea, 1852
+ Unio rufus Lea, 1857
+ Unio subgibbosus Lea, 1857
Elliptio (Martensnaias) rubicundus (von Martens, 1900) = Psoronaias rubicunda
Elliptio (Micronaias) aratus (Lea, 1843) = Micronaias arata
Elliptio (Micronaias) fallaciosus (Simpson, 1914) = Micronaias fallaciosa
Elliptio (Micronaias) granadensis (Lea, 1868) = Micronaias granadensis
+ Unio aratus Martens, 1900
Elliptio (Nephritica) haricotti Frierson, 1927 = Nephritica haricotti
Elliptio (Nephritica) poeyanus (Lea, 1857) = Nephritica poeyana
Elliptio (Nephronaias) aeruginosus (Morelet, 1849) = Nephronaias aeruginosa + Nephronaias macnielii
+ Unio macnielii Lea, 1869
Elliptio (Nephronaias) calamitarum (Morelet, 1849) = Nephronaias calamitarum
Elliptio (Nephronaias) calamitarum-prolongus [sic] (Crosse & Fischer, 1893) = Nephronaias calamitarum
Elliptio (Nephronaias) championi (von Martens, 1900) = Nephronaias goascoranensis
Elliptio (Nephronaias) copanensis (von Martens, 1900) = Nephronaias copanensis
Elliptio (Nephronaias) dysoni (Lea, 1859) = Nephronaias dysonii + Nephronaias calamitarum
+ Unio calamitarum var. G arcuans Fischer & Crosse, 1894
Elliptio (Nephronaias) guatemalensis [sic] (Martens, 1900) = Nephronaias goascoranensis
+ Unio goascoranensis Martens, 1900
Elliptio (Nephronaias) hjalmarsoni (Dunker, 1858) = Nephronaias hjalmarsoni
Elliptio (Nephronaias) melleus (Lea, 1859)
Elliptio (Nephronaias) oregonensis (Lea, 1852) = Nephronaias goascoranensis
+ Unio (Elliptio) radiatulus Martens, 1900
Elliptio (Nephronaias) persulcatus (Lea, 1859) = Nephronaias calamitarum
Elliptio (Nephronaias) plicatulus (Charpentier in Küster, 1856) = Nephronaias aztecorum
Elliptio (Nephronaias) ravistellus (Morelet, 1849) = Nephronaias ravistella
Elliptio (Nephronaias) ravistellus-vellicatus (Sowerby, 1865) = Nephronaias ravistella
Elliptio (Nephronaias) ravistellus-yzabalensis (Crosse & Fischer, 1892) = Nephronaias yzabalensis
Elliptio (Nephronaias) rowellii (Lea, 1859) = Nephronaias rowellii
Elliptio (Nephronaias) rugolosus [sic] (Charpentier in Küster, 1856)
Elliptio (Nephronaias) sajensis (Frierson, 1927) = Nephronaias dysonii
Elliptio (Nephronaias) scamnatus (Morelet, 1849) = Nephronaias scamnata
+ Unio (Simonaias) proclinatus Martens, 1900
+ Unio gundlachi Sowerby, 1866
Elliptio (Nephronaias) sphenorhynchus (Crosse & Fischer, 1893) = Nephronaias ortmanni
+ Unio (Nephronaias) ortmanni Frierson, 1913
Elliptio (Nephronaias) subventralis (von Martens, 1900)
Elliptio (Nephronaias) tabascoensis (Charpentier in Küster, 1856)
Elliptio (Pachynaias) rugososulcatus (Lea, 1866) = Pachynaias spheniopsis
Elliptio (Pachynaias) spheniopsis (Crosse & Fischer, 1893) [sic] = Pachynaias spheniopsis
Elliptio (Popenaias) metallicus (Say, 1831) = Popenaias metallica
+ Unio cuprinus Lea, 1831
+ Unio aereus Reeve, 1865
Elliptio (Popenaias) metallicus-ganinus (Pilsbry, 1909) = Popenaias semirasa
Elliptio (Popenaias) popei (Lea, 1857) = Popenaias popeii + Nephronaias ravistella
+ Unio veraepacis Tristram, 1863
Elliptio (Reticulatus) reticulatus (Simpson, 1900) = Arotonaias reticulata
Elliptio (s.s.) aheneus (Lea, 1841) = Elliptio ahenea
Elliptio (s.s.) aheneus-oscari (Wright, B.H., 1892) = Elliptio jayensis
Elliptio (s.s.) angustatus (Lea, 1831) = Elliptio angustata + Elliptio pullata
+ Unio extensus Lea, 1857
Elliptio (s.s.) anthonyi (Lea, 1861) = Elliptio monroensis
Elliptio (s.s.) aquilus (Lea, 1857) = Elliptio pullata
Elliptio (s.s.) arctatus (Conrad, 1834) = Elliptio arctata + Elliptio pullata
+ Unio viridans Lea, 1859
+ Unio mercerii Lea, 1862
+ Unio lazarus Lea, 1852
+ Unio strigosus Lea, 1840
Elliptio (s.s.) buckleyi (Lea, 1841) = Elliptio jayensis
Elliptio (s.s.) buddianus (Lea, 1843) = Elliptio jayensis + Elliptio monroensis + Elliptio dariensis
+ Unio websterii B.H. Wright, 1888
+ Unio buckleyi Simpson, 1900
Elliptio (s.s.) buddianus-dalli (Wright, B.H., 1888) = Elliptio jayensis
Elliptio (s.s.) buddianus-hartwrightii (Wright, B.H., 1896) = Elliptio monroensis
Elliptio (s.s.) buddianus-monroensis (Lea, 1843) = Elliptio monroensis
Elliptio (s.s.) buddianus-orcuttii (Wright, S.H., 1888) = Elliptio jayensis
Elliptio (s.s.) buddianus-pinei (Wright, B.H., 1897) = Elliptio jayensis
Elliptio (s.s.) buxtoni (Wright, B.H., 1897) = Elliptio jayensis
Elliptio (s.s.) chipolaensis (Walker, 1905) = Elliptio chipolaensis
Elliptio (s.s.) complanatus (Dillwyn, 1817) = Elliptio complanata + Elliptio icterina + Elliptio fumata + Elliptio hopetonensis + Elliptio roanokensis + Elliptio mediocris + Elliptio congaraea + Elliptio pullata
+ Unio decumbens Lea, 1861
+ Unio violaceus Spengler, 1793
+ Unio purpureus Say, 1817
+ Unio abbevillensis Lea, 1857
+ Unio aberrans Lea, 1863
+ Unio ablatus Lea, 1863
+ Unio amplus Lea, 1872
+ Unio baldwinensis Lea, 1859
+ Unio basalis Lea, 1872
+ Unio beaverensis Lea, 1868
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Elliptio (s.s.) complanatus-catawbensis (Lea, 1862) = Elliptio complanata + Parvaspina lanceolata
+ Unio wheatleyi Lea, 1857
+ Unio rostrum Lea, 1861
+ Unio oblongus Lea, 1872
+ Unio subsquamosus Lea, 1872
+ Unio sagittiformis Lea, 1852
+ Unio curvatus Lea, 1872
Elliptio (s.s.) complanatus-cuvierianus (Lea, 1852) = Elliptio complanata
Elliptio (s.s.) complanatus-icterinus (Conrad, 1834) = Elliptio icterina + Elliptio complanata
+ Unio curatus Lea, 1863
+ Unio cuspidatus Lea, 1872
+ Unio datus Lea, 1868
Elliptio (s.s.) complanatus-jejunus (Lea, 1838) = Elliptio complanata
+ Unio percoarctatus Lea, 1857
Elliptio (s.s.) complanatus-livingstonensis (Lea, 1863) = Elliptio icterina
Elliptio (s.s.) complanatus-ocmulgeensis (Lea, 1861) = Elliptio icterina
Elliptio (s.s.) complanatus-plantii (Lea, 1857) = Elliptio fumata
Elliptio (s.s.) complanatus-pullatus (Lea, 1858) = Elliptio pullata + Elliptio icterina
+ Unio hastatus Lea, 1874
Elliptio (s.s.) complanatus-subinflatus (Conrad, 1835) = Elliptio complanata + Elliptio roanokensis + Elliptio hopetonensis
+ Unio roanokensis Lea, 1838
+ Unio hopetonensis Lea, 1838
Elliptio (s.s.) complanatus-tuomeyi (Lea, 1852) = Elliptio icterina + Elliptio fumata + Elliptio pullata
+ Unio barrattii Lea, 1852
+ Unio hallenbeckii Lea, 1859
+ Unio verutus Lea, 1859
Elliptio (s.s.) congaraeus (Lea, 1831) = Elliptio congaraea
+ Unio fulvus Lea, 1834
+ Unio rufusculus Lea, 1852
+ Unio gibbesianus Lea, 1852
Elliptio (s.s.) coruscus (Gould, 1856) = Elliptio jayensis
Elliptio (s.s.) coruscus-fryanus (Wright, B.H., 1888) = Elliptio occulta + Elliptio jayensis
+ Unio diazensis S.H. Wright, 1897
Elliptio (s.s.) cunninghami (Wright, B.H., 1883) = Elliptio jayensis
Elliptio (s.s.) cylindraceus Frierson, 1927 = Elliptio icterina
+ Unio lugubris Lea, 1838
Elliptio (s.s.) dariensis (Lea, 1842) = Elliptio dariensis
Elliptio (s.s.) dorei (Wright, B.H., 1888) = Elliptio jayensis
Elliptio (s.s.) dorsatus (Lea, 1868) = Elliptio congaraea
Elliptio (s.s.) downiei (Lea, 1858) = Elliptio downiei
Elliptio (s.s.) duttonianus (Lea, 1841) = Parvaspina lanceolata
Elliptio (s.s.) emmonsii (Lea, 1857) = Parvaspina lanceolata + Elliptio angustata
+ Unio subcylindraceus Lea, 1874
Elliptio (s.s.) errans (Lea, 1856) = Elliptio icterina + Elliptio complanata + Elliptio pullata
+ Unio palliatus Ravenel, 1875
+ Unio singularis B.H. Wright, 1899
+ Unio contractus Lea, 1857
Elliptio (s.s.) ferrissii (Marsh, 1891) = Elliptio jayensis
Elliptio (s.s.) folliculatus (Lea, 1838) = Elliptio folliculata
+ Unio attenuatus Lea, 1872
+ Unio exacutus Lea, 1872
+ Unio rostellum Lea, 1872
Elliptio (s.s.) forbesianus (Lea, 1853) = Elliptio congaraea
+ Unio moussonianus Lea, 1852
+ Unio congaraeus Conrad, 1836
Elliptio (s.s.) fraternus (Lea, 1852) = Elliptio fraterna
Elliptio (s.s.) fuscatus (Lea, 1841) = Elliptio occulta
Elliptio (s.s.) geddingsianus (Lea, 1840) = Elliptio icterina + Elliptio complanata
+ Unio whiteianus Lea, 1852
+ Unio protensus Lea, 1865
+ Unio radiolus Lea, 1871
+ Unio limatulus Conrad, 1849
Elliptio (s.s.) geminus (Lea, 1856) = Elliptio complanata + Elliptio downiei
+ Unio satillaensis Lea, 1858
Elliptio (s.s.) hazelhurstianus [sic] (Lea, 1858) = Parvaspina lanceolata
Elliptio (s.s.) hepaticus (Lea, 1859) = Elliptio icterina
Elliptio (s.s.) hinkleyi (Wright, B.H., 1888) = Elliptio jayensis
Elliptio (s.s.) insulsus (Lea, 1857) = Elliptio complanata + Elliptio cistellaeformis
+ Unio cistellaeformis Lea, 1863
Elliptio (s.s.) jayensis (Lea, 1838) = Elliptio jayensis
+ Margaron (Unio) jayanus ‘Lea’ of Authors
+ Unio prasinatus Conrad, 1866
+ Unio simpsoni B.H. Wright, 1888
Elliptio (s.s.) jayensis-tryoni (Wright, B.H., 1888) = Elliptio jayensis
Elliptio (s.s.) lanceolatus (Lea, 1828) = Parvaspina lanceolata
Elliptio (s.s.) lecontianus (Lea, 1838) = Elliptio congaraea + Lampsilis straminea
+ Unio contrarius Conrad, 1849
Elliptio (s.s.) lehmani (Wright, S.H., 1897) = Elliptio occulta + Elliptio icterina
+ Unio burtchianus S.H. Wright, 1897
+ Unio fuscatus Reeve, 1865
Elliptio (s.s.) lucidus (Lea, 1863) = Elliptio icterina
Elliptio (s.s.) marshii (Wright, B.H., 1888) = Elliptio jayensis
Elliptio (s.s.) masoni (Conrad, 1834) = Fusconaia masoni
+ Unio merus Lea, 1852
+ Unio castus Simpson, 1900
Elliptio (s.s.) micans (Lea, 1857) = Elliptio icterina + Elliptio complanata
+ Unio perlucens Lea, 1863
Elliptio (s.s.) naviculoides (Lea, 1857) = Parvaspina lanceolata
Elliptio (s.s.) nigellus (Lea, 1853) = Elliptio nigella + Elliptio purpurella
+ Unio denigratus Lea, 1857
+ Unio purpurellus Lea, 1857
Elliptio (s.s.) niger (Rafinesque, 1820) = Elliptio crassidens
+ Unio crassidens Lamarck, 1819
+ Unio cuneatus Barnes, 1823
+ Unio discus Sowerby, 1868
+ Unio (Elliptio) nigra var. maculata Rafinesque, 1820
Elliptio (s.s.) niger-danielsi (Wright, B.H., 1899) = Elliptio crassidens
Elliptio (s.s.) niger-incrassatus (Lea, 1840) = Elliptio crassidens
Elliptio (s.s.) nolani (Wright, B.H., 1888) = Elliptio jayensis
Elliptio (s.s.) obnubilus (Lea, 1857) = Elliptio icterina
+ Unio opacus Lea, 1857
+ Unio aequatus Lea, 1857
Elliptio (s.s.) occultus (Lea, 1841) = Elliptio occulta
Elliptio (s.s.) perstriatus (Lea, 1852) = Elliptio arctata
+ Unio gracilentus Lea, 1857
+ Unio perlatus Lea, 1863
Elliptio (s.s.) polymorphus (Wright, B.H., 1899) = Elliptio monroensis
Elliptio (s.s.) productus (Conrad, 1836) = Elliptio producta + Elliptio fisheriana + Elliptio nasutidus
+ Unio fisherianus Lea, 1838
+ Unio nasutus Conrad, 1838
+ Unio barrotti Küster, 1861
+ Unio nasutulus Lea, 1866
Elliptio (s.s.) pusillus (Lea, 1840) = Elliptio congaraea
+ Unio vestitus Lea, 1861
+ Unio buxeus Lea, 1852
+ Unio corvus Lea, 1859
Elliptio (s.s.) pygmaeus (Lea, 1852) = Platynaias subviridis
+ Unio pygamaeus Simpson, 1914
Elliptio (s.s.) raveneli (Conrad, 1834) = Elliptio icterina + Elliptio complanata
+ Unio confertus Lea, 1834
+ Margarita (Unio) watereensis Lea, 1836
+ Unio santeensis Lea, 1871
Elliptio (s.s.) rostraeformis (Lea, 1856) = Parvaspina lanceolata + Elliptio pullata
+ Unio maconensis Lea, 1857
Elliptio (s.s.) shepardianus (Lea, 1834) = Elliptio shepardiana
Elliptio (s.s.) similis (Lea, 1857) = Elliptio icterina
Elliptio (s.s.) spadiceus (Lea, 1857) = Elliptio complanata
Elliptio (s.s.) spissus (Lea, 1859) = Elliptio downiei
Elliptio (s.s.) subluridus (Simpson, 1900) = Elliptio jayensis
Elliptio (s.s.) subniger (Lea, 1857) = Elliptio fumata + Elliptio complanata
+ Unio burkensis Lea, 1859
Elliptio (s.s.) suttoni (Wright, B.H., 1897) = Elliptio jayensis
Elliptio (s.s.) tenuisculus (Frierson, 1911) = Elliptio jayensis
Elliptio (s.s.) tortivus (Lea, 1840) = Elliptio arctata + Elliptio pullata
+ Unio tetricus Lea, 1857
Elliptio (s.s.) viridicatus (Lea, 1857) = Elliptio icterina
Elliptio (s.s.) viridulus (Lea, 1863) = Parvaspina lanceolata
Elliptio (s.s.) waccamawensis (Lea, 1863) = Elliptio congaraea
Elliptio (s.s.) waltoni (Wright, B.H., 1888) = Elliptio ahenea
Elliptio (Sphenonaias) callosus (Lea, 1841) = Ortmanniana ligamentina + Nephronaias tehuantepecensis
+ Unio tehuantepecensis Crosse & Fischer, 1894
Elliptio (Sphenonaias) coloratus (Charpentier, 1856)
Elliptio (Sphenonaias) flucki (Bartsch, 1906) = Nephronaias flucki
Elliptio (Sphenonaias) liebmanni (Philippi, 1847) = Sphenonaias liebmanni
Elliptio (Sphenonaias) liebmanni-cuatotolapamensis Baker, H.B., 1922 = Sphenonaias liebmanni
Elliptio (Sphenonaias) mexicanus (Philippi, 1847)
Elliptio (Sphenonaias) microdon (von Martens, 1887) = Mesonaias explicata
Elliptio (Uniomerus) declivis (Say, 1831) = Uniomerus declivis
+ Unio geometricus Lea, 1834
Elliptio (Uniomerus) dispalans (Wright, B.H., 1899) = Elliptio occulta
Elliptio (Uniomerus) obesus (Lea, 1831) = Uniomerus carolinianus + Uniomerus tetralasmus
+ Unio ineptus Lea, 1852
+ Unio hebes Lea, 1852
+ Unio rivularis Conrad, 1853
+ Unio rivicolus Conrad, 1868
+ Unio cicur Lea, 1861
+ Unio squalidus Lea, 1863
+ Unio jewettii Lea, 1867
+ Unio pawensis Lea, 1868
+ Unio caroliniana Bosc, 1801
Elliptio (Uniomerus) obesus-blandingianus (Lea, 1834) = Uniomerus carolinianus
+ Unio paludicolor Conrad, 1853
Elliptio (Uniomerus) tetralasmus (Say, 1831) = Uniomerus tetralasmus + Uniomerus declivis
+ Unio excultus Conrad, 1838
+ Unio parallelus Conrad, 1841
+ Unio porrectus Conrad, 1854
+ Unio subcroceus Conrad, 1854
+ Unio symmetricus Lea, 1845
+ Unio jamesianus Lea, 1857
+ Unio declivis Conrad, 1836
Elliptio (Uniomerus) tetralasmus-manubius (Gould, 1855) = Uniomerus tetralasmus
Elliptio (Uniomerus) tetralasmus-sayi (Ward, 1839) = Uniomerus tetralasmus
+ Unio sayanus ‘Ward’ of Authors
+ Unio electrinus Reeve, 1865
Glebula suborbiculata (Lamarck, 1819) = Glebula rotundata + Cyrtonaias berlandierii
+ Unio rotundata Lamarck, 1819
+ Unio glebulus Say, 1831
+ Obliquaria (Plagiola) decorticata Rafinesque, 1820
+ Unio subglobosus Lea, 1834
+ Unio grandensis Conrad, 1855
Gonidea angulata (Lea, 1838)
+ Anodon feminalis Gould, 1850
+ Anodonta randalli Trask, 1854
+ Anodon biangulata Sowerby, 1869
Gonidea angulata-haroldiana Dall, 1908 = Gonidea angulata
Gonidea angulata-subangulata (Hemphill, 1891) = Gonidea angulata
Hemistena lata (Rafinesque, 1820)
+ Odatelia radiata Rafinesque, 1832
+ Unio dehiscens Say, 1829
+ Unio oriens Lea, 1831
+ Anodonta prelonga Rafinesque, 1832
+ Unio hildrethi Delessert, 1841
Lampsilis (Actinonaias) computata (Crosse & Fischer, 1893) = Actinonaias sapotalensis
Lampsilis (Actinonaias) coyensis Pilsbry, 1909 = Actinonaias coyensis
Lampsilis (Actinonaias) gundlachi (Dunker, 1858) = Actinonaias gundlachi
Lampsilis (Actinonaias) moctezumensis Pilsbry, 1909 = Disconaias fimbriata
Lampsilis (Actinonaias) ruthveni Baker, H.B., 1922 = Actinonaias sapotalensis
Lampsilis (Actinonaias) sapotalensis (Lea, 1841) = Actinonaias sapotalensis
Lampsilis (Actinonaias) signata Pilsbry, 1909 = Actinonaias signata
Lampsilis (Actinonaias) undivaga Pilsbry, 1909 = Actinonaias signata
Lampsilis (Cyrtonaias) alienigena (Crosse & Fischer, 1893) = Mesonaias umbrosa
Lampsilis (Cyrtonaias) explicata (Morelet, 1849) = Mesonaias explicata
Lampsilis (Cyrtonaias) livida Simpson, 1900 = Mesonaias explicata
+ Unio testudineus Reeve, 1865
+ Unio explicatus Fischer & Crosse, 1894
Lampsilis (Cyrtonaias) saladoensis (Lea, 1860) = Cyrtonaias berlandierii + Diplodon variabilis
+ Unio subtrapezius Philippi, 1847
Lampsilis (Cyrtonaias) sapperi (von Ihering, 1901) = Mesonaias explicata
Lampsilis (Cyrtonaias) tampicoensis (Lea, 1838) = Mesonaias tampicoensis
Lampsilis (Cyrtonaias) tampicoensis-kusteriana N.V. = Mesonaias tampicoensis
+ Unio tampicoensis Küster, 1862
Lampsilis (Cyrtonaias) umbrosa (Lea, 1856) = Mesonaias umbrosa + Unio caffer + Actinonaias medellina + Mesonaias tampicoensis
+ Unio verrauxi Küster, 1856
+ Unio veracruzensis Lea, 1868
+ Lampsilis rovirosai sanjuanensis H.B. Baker, 1922
Lampsilis (Delphinonaias) delphinulus (Morelet, 1849) = Delphinonaias largillierti
Lampsilis (Delphinonaias) paludosa (Morelet, 1849) = Delphinonaias largillierti
