MUSSELpdb

Conrad, T.A. 1853. A synopsis of the family of Naïades of North America, with notes, and a table of some of the genera and sub-genera of the family, according to their geographical distribution, and descriptions of genera and sub-genera. Proceedings of the Academy of Natural Sciences of Philadelphia 6: 243-269. Available electronically.

Taxonomic Opinions

Alasmodonta arcula (Lea, 1838) = Alasmidonta arcula

Alasmodonta confragosa Say = Arcidens confragosus

Alasmodonta marginata (Say) = Alasmidonta varicosa
+ Unio varicosa Lamarck, 1819
+ Unio rugulosus Wood, 1828
+ Alasmodonta truncata ‘Say, in lit.’ of Authors

Alasmodonta marginata (Say) = Alasmidonta marginata

Anodonta angulata Lea = Gonidea angulata

Anodonta benedictensis Lea = Pyganodon grandis

Anodonta buchanensis Lea = Anodontoides ferussacianus

Anodonta californiensis Lea

Anodonta cataracta Say = Pyganodon cataracta
+ Anodonta fluviatilis ‘Gmelin’ of Authors

Anodonta cognata Gould = Anodonta oregonensis

Anodonta couperiana Lea = Utterbackiana couperiana

Anodonta cylindracea Lea = Anodontites cylindracea

Anodonta declivis Con., 1834 = Pyganodon grandis
+ Anodonta plana Lea, 1834

Anodonta decora Lea = Pyganodon grandis

Anodonta denigrata Lea, 1852 = Anodontoides denigratus

Anodonta excurvata Dekay = Pyganodon cataracta

Anodonta ferruginea Lea = Anodontoides ferussacianus

Anodonta ferussaciana Lea = Anodontoides ferussacianus

Anodonta footiana Lea = Pyganodon grandis

Anodonta fragilis Lam. = Pyganodon fragilis

Anodonta gibbosa Say, 1824 = Pyganodon gibbosa

Anodonta gigantea Lea = Pyganodon grandis

Anodonta glauca Valen. = Anodontites trapesialis

Anodonta grandis Say, 1829 = Pyganodon grandis
+ Anodonta corpulenta Cooper, 1834

Anodonta harpenthis [sic] Lea = Pyganodon grandis

Anodonta imbecilis [sic] Say, 1829 = Utterbackia imbecillis
+ Anodonta incerta Lea, 1834

Anodonta implicata Say = Utterbackiana implicata
+ Anodonta newtonensis Lea, 1838

Anodonta impura Say, 1829 = Brachyanodon impura

Anodonta linneana [sic] Lea = Pyganodon grandis

Anodonta lugubris Say, 1829 = Pyganodon grandis

Anodonta marginata Say = Pyganodon cataracta

Anodonta marryattana [sic] Lea = Pyganodon grandis

Anodonta nuttalliana Lea

Anodonta oblita Lea, 1852 = Anodontoides denigratus

Anodonta opaca Lea, 1852 = Pyganodon grandis

Anodonta oregonensis Lea

Anodonta ovata Lea = Pyganodon grandis

Anodonta pavonia Lea = Strophitus undulatus

Anodonta pepiniana Lea = Pyganodon grandis

Anodonta plicata Hald. = Anodontoides denigratus

Anodonta salmonia Lea = Pyganodon grandis

Anodonta stewartiana Lea = Pyganodon grandis

Anodonta subcylindracea Lea = Anodontoides ferussacianus

Anodonta suborbiculata Say = Utterbackiana suborbiculata

Anodonta subvexa Con. = Pseudodontoideus subvexus

Anodonta teres Con. = Pyganodon cataracta

Anodonta virens Lea = Pyganodon grandis

Anodonta wahlamatensis Lea = Anodonta nuttalliana

Coelatura aegyptiacus Caill. = Coelatura aegyptiaca

Complanaria complanata (Barnes) = Pterosyna complanata
+ Unio katherinae Lea, 1838

Complanaria compressa (Lea, 1832) = Platynaias compressa
+ Complanaria alasmodontina Stimpson, 1851

Complanaria costata (Raf.) = Lasmigona costata
+ Alasmodonta rugosa Barnes, 1823

Cucumaria cucumoides (Lea) = Cucumerunio novaehollandiae

Hyriopsis delphinus (Gruner) = Hyriopsis bialata

Leptodea lata Raf. = Hemistena lata
+ Unio dehiscens Say, 1829
+ Unio oriens Lea, 1831

Leptodea leptodon Raf. = Potamilus leptodon
+ Unio planus Barnes, 1823
+ Anodon purpurascens Swainson, 1823
+ Symphynota tenuissima Lea, 1829

Leptodea leptodon Raf. = Potamilus fragilis

Margaritana arcuata (Barnes) = Margaritifera margaritifera

Margaritana falcata Gould = Margaritifera falcata

Margaritana monodonta (Say) = Cumberlandia monodonta
+ Unio soleniformis Lea, 1831

Metaptera alata (Say) = Potamilus alatus
+ Metaptera megaptera Rafinesque, 1820

Metaptera fragilis (Raf.) = Potamilus fragilis
+ Unio fragilis ‘Rafinesque’ of Authors
+ Unio gracilis Barnes, 1823

Metaptera inflata (Lea) = Potamilus inflatus
+ Unio inflatus Conrad, 1836
+ Unio alabamensis Conrad, 1834

Metaptera ohiensis (Raf.) = Potamilus ohiensis
+ Symphynota laevissima Lea, 1829

Monodontina buschiana (Con.) = Pseudodon vondembuschianus
+ Margaritana vondembuschiana Lea, 1840

Nodularia douglasiæ (Gray) = Nodularia douglasiae

Parreysia multidentatus (Parreyss) = Parreysia corrugata

Plectomerus atromarginatus (Lea) = Elliptoideus sloatianus

Plectomerus boykianus [sic] (Lea) = Megalonaias nervosa

Plectomerus costatus (Raf.) = Amblema plicata
+ Unio costatus ‘Rafinesque’ of Authors
+ Unio undulatus Barnes, 1823
+ Unio latecostatus Lea, 1845

Plectomerus crassidens (Lam.) = Plectomerus dombeyanus
+ Unio interruptus Say, 1831
+ Unio trapezoides Lea, 1831

Plectomerus nicklinianus (Lea) = Megalonaias nickliniana

Plectomerus perplicatus (Con.) = Amblema plicata
+ Unio atrocostatus Lea, 1845

Plectomerus plectophorus (Con.) = Elliptoideus sloatianus

Plectomerus plicatus (Say) = Amblema plicata
+ Unio peruviana Lamarck, 1819
+ Unio rariplicata Lamarck, 1819
+ Unio dombeyana Valenciennes, 1827
+ Unio crassus Barnes, 1823
+ Unio hippopoeus Lea, 1845

Plectomerus plicatus (Say) = Plectomerus dombeyanus

Plectomerus sloatianus (Lea) = Elliptoideus sloatianus

Strophitus argentea (Lea) = Anodontoides denigratus

Strophitus arkansensis (Lea) = Strophitus undulatus

Strophitus calceolus (Lea) = Sulcularia viridis

Strophitus curreyanus [sic] (Lea) = Pegias fabula

Strophitus deltoideus (Lea) = Sulcularia viridis

Strophitus edentulus (Say) = Strophitus undulatus
+ Anodon areolatus Swainson, 1829

Strophitus etowaosis [sic] (Con., 1849) = Alasminota etowaensis

Strophitus fabula (Lea) = Pegias fabula

Strophitus hildrethianus (Lea) = Simpsonaias ambigua

Strophitus holstonia (Lea) = Alasminota holstonia

Strophitus minor (Lea) = Sulcularia viridis

Strophitus radiatus (Con.)

Strophitus ravenelianus (Lea) = Alasmidonta raveneliana

Strophitus shæfferiana (Lea) = Strophitus undulatus

Strophitus tetragona (Lea, 1846) = Strophitus undulatus

Strophitus unadilla (Dekay) = Strophitus undulatus

Strophitus undulatus (Say)
+ Anodon rugosus Swainson, 1822
+ Anodonta pensylvanica Lamarck, 1819

Strophitus virgatus (Conrad, 1836) = Strophitus undulatus
+ Anodonta wardiana Lea, 1838

Unio abacus Hald. = Ptychobranchus fasciolaris

Unio aberti Con., 1850 = Cyprogenia aberti
+ Unio lamarckianus Lea, 1852

Unio acutissimus Lea, 1834 = Medionidus acutissimus

Unio affinis Lea, 1852 = Lampsilis straminea

Unio altilis Con. = Hamiota altilis

Unio amœnus Lea, 1841 = Cambarunio iris

Unio amygdalum Lea, 1846 = Villosa amygdalum

Unio angustatus Lea, 1832 = Elliptio angustata

Unio apiculatus Say, 1829 = Quadrula quadrula
+ Unio asper Jay, 1839

Unio approximus Lea, 1845 = Lampsilis hydiana

Unio arctatus Con. = Elliptio arctata

Unio arctior Lea, 1838 = Eurynia dilatata

Unio argenteus Lea, 1841 = Pleurobema oviforme

Unio asper Lea, 1832 = Quadrula quadrula

Unio barnesianus Lea, 1838 = Pleuronaia barnesiana

Unio barrattii Lea, 1852 = Elliptio icterina

Unio biangulatus Lea, 1841 = Ortmanniana pectorosa

Unio bigbyensis Lea, 1841 = Pleuronaia barnesiana

Unio binneyi Lea, 1845 = Diplodon rhuacoicus

Unio blandingianus Lea, 1834 = Uniomerus carolinianus

Unio bournianus Lea, 1841 = Pleurobema clava

Unio boydianus Lea, 1841 = Atlanticoncha ochracea

Unio brumbyanus Lea, 1841 = Ptychobranchus greenii

Unio buckleyi Lea, 1846 = Elliptio jayensis

Unio buddianus Lea, 1846 = Elliptio jayensis

Unio bullatus Raf., 1820 = Pustulosa pustulosa
+ Unio verrucosus albus Hildreth, 1828
+ Unio pustulosus Lea, 1831

Unio bullatus Raf., 1820 = Cyprogenia stegaria

Unio buxeus Lea, 1852 = Elliptio congaraea

Unio caliginosus Lea, 1845 = Leaunio lienosus

Unio callosus Lea, 1841 = Ortmanniana ligamentina

Unio capax Green, 1832 = Potamilus capax
+ Symphynota globosa Lea, 1834

Unio capsæformis Lea, 1834 = Epioblasma capsaeformis

Unio cardium Raf., 1820 = Lampsilis cariosa
+ Unio ventricosus Barnes, 1823
+ Unio occidens Lea, 1829
+ Unio subovatus Lea, 1831
+ Unio ovata Lamarck, 1819

Unio cardium Raf., 1820 = Lampsilis cardium

Unio cariosus Say = Lampsilis cariosa
+ Unio ovata Valenciennes, 1827
+ Unio cariosus De Kay, 1843

Unio cariosus Say = Lampsilis cardium

Unio carolinanus [sic] Bosc = Uniomerus carolinianus
+ Unio obesus Lea, 1831

Unio castaneus Lea, 1832 = Obovaria arkansasensis

Unio catillus Conrad, 1836 = Pleurobema sintoxia

Unio cerinus Con., 1838 = Fusconaia cerina

Unio cicatricosus Say, 1829 = Plethobasus cicatricosus
+ Unio varicosus Lea, 1831

Unio cincinnatiensis Lea, 1841 = Epioblasma cincinnatiensis

Unio claibornensis Lea, 1838 = Lampsilis straminea
+ Unio obtusus Lea, 1840

Unio clarkianus Lea, 1852 = Hamiota altilis

Unio clava Lamarck, 1819 = Pleurobema clava
+ Pleurobema mytiloides Rafinesque, 1820
+ Obliquaria (Scalenaria) scalenia Rafinesque, 1820
+ Pleurobema cuneata Rafinesque, 1820
+ Unio modioliformis ‘Say’ of Authors
+ Unio clavus Conrad, 1835

Unio coccineus ‘Hildreth’ MSS = Pleurobema sintoxia
+ Unio coccineus Lea, 1838

Unio collinus Con. = Parvaspina collina

Unio complanatus Solander = Elliptio complanata
+ Unio violaceus Spengler, 1793
+ Unio coarctata Lamarck, 1819
+ Unio purpurascens Lamarck, 1819
+ Unio rhombula Lamarck, 1819
+ Unio carinifera Lamarck, 1819
+ Unio georgina Lamarck, 1819
+ Unio sulcidens Lamarck, 1819
+ Unio glabrata Lamarck, 1819
+ Unio rarisulcata Lamarck, 1819
+ Unio (Elliptio) aurata Rafinesque, 1820
+ Unio purpureus Say, 1817

Unio compressissimus Lea, 1845 = Ptychobranchus fasciolaris

Unio concavus Lea, 1852 = Villosa delumbis

Unio congaræus Lea, 1832 = Elliptio congaraea

Unio conradicus Lea, 1834 = Medionidus conradicus

Unio constrictus Con. = Venustaconcha constricta

Unio contrarius Con. = Lampsilis straminea

Unio cooperianus Lea, 1834 = Plethobasus cooperianus

Unio cor Con. = Fusconaia cor

Unio cordatus (Raf.) = Pleurobema cordatum

Unio creperus Lea = Cambarunio iris

Unio crocatus Lea, 1841 = Atlanticoncha ochracea

Unio cumberlandianus Lea, 1838 = Cambarunio simus
+ Unio cumberlandicus Lea, 1838

Unio cuneolus Lea, 1842 = Fusconaia cuneolus

Unio cuvierianus Lea, 1852 = Elliptio complanata

Unio cylindricus Say = Theliderma cylindrica
+ Unio naviformis Lamarck, 1819
+ Unio (Eurynia) solenoides Rafinesque, 1820

Unio cyphius [sic] Raf. = Plethobasus cyphyus
+ Unio aesopus Green, 1827

Unio cyrenoides Philippi, 1848 = Arotonaias cyrenoides

Unio dactylus Lea, 1841 = Cambarunio dactylus

Unio dariensis Lea, 1841 = Elliptio dariensis

Unio decisus Lea, 1832 = Pleurobema decisum

Unio declivis Say, 1831 = Uniomerus declivis
+ Unio geometricus Lea, 1834

Unio decoratus Lea, 1852 = Platynaias decorata

Unio delumbis Con. = Villosa delumbis
+ Unio modioliformis Lea, 1834

Unio delumbis Con. = Villosa vibex

Unio dilatatus Raf. = Eurynia dilatata
+ Obliquaria (Ellipsaria) cuprea Rafinesque, 1820
+ Obliquaria (Ellipsaria) atroviolacea Rafinesque, 1820
+ Unio nasuta Lamarck, 1819
+ Unio gibbosus Barnes, 1823

Unio discus Lea, 1838 = Disconaias disca

Unio dolabelloides Lea, 1842 = Pleuronaia dolabelloides

Unio dorfeuillianus Lea, 1838 = Pustulosa pustulosa

Unio dromas Lea, 1834 = Dromus dromas
+ Unio caperatus Lea, 1845

Unio duttonianus Lea, 1841 = Parvaspina lanceolata

Unio edgarianus Lea, 1841 = Fusconaia cor

Unio excultus Con. = Uniomerus declivis
+ Margaron (Unio) declivis Lea, 1852

Unio exiguus Lea, 1842 = Villosa vibex

Unio famelicus Gould = Diplodon granosus

Unio fasciatus [Raf.] = Ortmanniana ligamentina
+ Unio crassus Say, 1817
+ Unio carinatus Barnes, 1823
+ Unio ellipticus Barnes, 1823

Unio fasciolaris Raf. = Ptychobranchus fasciolaris
+ Unio phaseolus Hildreth, 1828
+ Obliquaria (Ellipsaria) sinuata Rafinesque, 1820
+ Unio mucronatus Barnes, 1823
+ Unio planulatus Lea, 1829
+ Unio cuneatus Hildreth, 1828
+ Unio camelus Lea, 1834

Unio fasciolaris Raf. = Eurynia dilatata

Unio fasciolus Raf. = Hamiota subangulata
+ Unio subangulatus Lea, 1840

Unio fasciolus Raf. = Lampsilis fasciola

Unio fatuus Lea = Cambarunio iris

Unio fisherianus Lea, 1838 = Elliptio fisheriana
+ Unio nasutus Conrad, 1838

Unio fisherianus Lea, 1838 = Elliptio producta

Unio flavescens Lea, 1845 = Ptychobranchus greenii

Unio flavus Raf. = Fusconaia flava
+ Unio flavus Conrad, 1837
+ Unio rubiginosus Lea, 1829

Unio flexuosus Raf. = Epioblasma flexuosa
+ Unio flexuosus ‘Rafinesque’ of Authors
+ Unio foliatus Hildreth, 1828

Unio floridensis Lea, 1852 = Lampsilis floridensis

Unio folliculatus Lea, 1838 = Elliptio folliculata

Unio forbesianus Lea, 1852 = Elliptio congaraea

Unio foremanianus Lea, 1841 = Ptychobranchus foremanianus

Unio fraternus Lea, 1852 = Elliptio fraterna

Unio fulgidus Lea, 1845 = Pleurobema sintoxia

Unio fuliginosus Lea, 1845 = Elliptio complanata

Unio furvus Con. = Pleurobema georgianum
+ Unio hanleyianus Lea, 1852
+ Unio troschelianus Lea, 1852

Unio furvus Con. = Pleurobema rubellum

Unio furvus Con. = Pleurobema hanleyianum

Unio fuscatus Lea, 1846 = Elliptio occulta

Unio geddingsianus Lea, 1841 = Elliptio icterina

Unio georgianus Lea, 1841 = Pleurobema georgianum

Unio gibber Lea = Pleuronaia gibber

Unio gibbesianus Lea, 1852 = Elliptio congaraea

Unio glaber Lea, 1838 = Cambarunio iris

Unio glans Lea, 1832 = Toxolasma lividum

Unio gouldii Lea, 1845 = Leaunio lienosus

Unio graniferus Lea = Cyclonaias tuberculata

Unio greenii Con. = Ptychobranchus greenii
+ Unio simplex Lea, 1845

Unio griffithianus Lea, 1834 = Elliptio complanata

Unio haleianus Lea, 1842 = Leaunio lienosus

Unio hayesianus [sic] Lea, 1834 = Epioblasma haysiana

Unio hebes Lea, 1852 = Uniomerus carolinianus

Unio heterodon Lea, 1833 = Prolasmidonta heterodon

Unio holstonensis Lea, 1841 = Pleurobema oviforme

Unio hopetonensis Lea, 1838 = Elliptio hopetonensis

Unio hyalinus Lea, 1845 = Platynaias subviridis

Unio hydianus Lea, 1838 = Lampsilis hydiana

Unio icterinus Con. = Elliptio congaraea
+ Unio fulvus Lea, 1834

Unio icterinus Con. = Elliptio icterina

Unio ineptus Lea, 1852 = Uniomerus carolinianus

Unio infucatus Co. = Pustulosa infucata

Unio intermedius Con. = Theliderma intermedia

Unio interruptus Raf. = Epioblasma brevidens
+ Unio interruptus ‘Rafinesque’ of Authors
+ Unio brevidens Lea, 1831

Unio interruptus Raf. = Ptychobranchus fasciolaris

Unio jejunus Lea, 1838 = Elliptio complanata

Unio keinerianus [sic] Lea, 1852 = Pustulosa kieneriana
+ Unio keinerianus Lea, 1852

Unio kirtlandianus Lea, 1834 = Fusconaia subrotunda

Unio kleinianus Lea, 1852 = Pustulosa kleiniana

Unio lapillus Say, 1831 = Paetulunio fabalis
+ Unio fabalis Lea, 1831

Unio latiradiatus Con. = Cambarunio taeniatus
+ Unio interruptus Lea, 1838

Unio lazarus Lea, 1852 = Elliptio arctata

Unio lævigatus [sic] Raf. = Obovaria subrotunda
+ Unio lens Lea, 1831

Unio lecontianus Lea, 1838 = Elliptio congaraea

Unio lenior Lea, 1841 = Epioblasma lenior

Unio leseurianus [sic] Lea, 1842 = Fusconaia subrotunda

Unio lienosus Con. = Cambarunio iris
+ Unio obscurus Lea, 1838

Unio lienosus Con. = Leaunio lienosus

Unio ligamentinus Lam. = Ortmanniana ligamentina
+ Unio fasciolus ‘Rafinesque’ of Authors
+ Unio multiradiatus Lea, 1829

Unio ligamentinus Lam. = Lampsilis fasciola

Unio limatulus Con., 1849 = Elliptio icterina
+ Unio tuomeyi Lea, 1852

Unio lineatus Lea, 1841 = Lampsilis binominata

Unio lineolatus (Raf.) = Ellipsaria lineolata
+ Obliquaria (Plagiola) depressa Rafinesque, 1820
+ Unio securis Lea, 1829

Unio lugubris Lea = Elliptio icterina

Unio luridus Lea = Elliptio arca

Unio luteolus Lam. = Lampsilis radiata
+ Unio siliquoideus Barnes, 1823
+ Unio inflatus Barnes, 1823

Unio luteolus Lam. = Lampsilis siliquoidea

Unio maculatus Con., 1834 = Pleuronaia dolabelloides

Unio masoni Con. = Fusconaia masoni

Unio menkianus Lea, 1838 = Cambarunio taeniatus

Unio merus Lea, 1852 = Fusconaia masoni

Unio metallicus Say, 1830 = Popenaias metallica
+ Unio cuprinus Lea, 1831

Unio metaneurus [sic] Raf. = Quadrula quadrula
+ Unio nodosus Barnes, 1823
+ Unio rugosus Barnes, 1823

Unio metaneurus [sic] Raf. = Theliderma metanevra

Unio minor Lea, 1846 = Toxolasma paulum

Unio mississippiensis Con. = Sagittunio subrostratus

Unio mœstus Lea, 1841 = Toxolasma lividum

Unio monroensis Lea, 1841 = Elliptio monroensis

Unio mortoni Con., 1835 = Pustulosa pustulosa
+ Unio turgidus Lea, 1838

Unio moussianus [sic] Lea, 1852 = Elliptio congaraea

Unio mühlfeldianus Lea, 1838 = Cambarunio dactylus

Unio nashvillianus Lea, 1834 = Sagittunio subrostratus

Unio nasutus Say = Sagittunio nasutus
+ Unio nasutus Conrad, 1838
+ Unio rostrata Valenciennes, 1827

Unio nebulosus Con. = Cambarunio nebulosus

Unio neglectus Lea, 1846 = Platynaias subviridis

Unio nervosus Raf. = Truncilla donaciformis
+ Unio nervosa ‘Rafinesque’ of Authors
+ Unio zigzag Lea, 1829
+ Unio donaciformis Lea, 1828

Unio nervosus Raf. = Megalonaias nervosa

Unio nexus Say, 1831 = Epioblasma arcaeformis
+ Unio arcaeformis Lea, 1831

Unio nigellus Lea = Elliptio nigella

Unio niger Raf. = Elliptio crassidens
+ Unio incrassatus Lea, 1840

Unio nigerrimus Lea, 1852 = Leaunio lienosus

Unio nigrinus Lea = Villosa vibex

Unio nitens Lea = Leaunio vanuxemensis

Unio nodiferus Con. = Pustulosa pustulosa

Unio nodulatus Raf. = Pustulosa nodulata
+ Unio pustulatus Lea, 1831
+ Unio nodulatus ‘Rafinesque’ of Authors

Unio notatus Lea, 1838 = Cambarunio simus

Unio novi-eboraci Lea, 1838 = Cambarunio iris

Unio nucleopsis Con. = Pleurobema georgianum

Unio obliquata (Raf.) = Epioblasma obliquata
+ Unio ridibundus Say, 1829
+ Unio sulcatus Lea, 1829

Unio obliquus Lam. = Reginaia ebenus
+ Unio obliqua ‘Lamarck’ of Authors
+ Unio ebenus Lea, 1831
+ Unio (s.s.) mytiloides Swainson, 1840

Unio obliquus Lam. = Pleurobema cordatum

Unio obovalis Raf. = Reginaia ebenus
+ Unio solidus Lea, 1838

Unio obovalis Raf. = Pleurobema sintoxia

Unio obtusus Lea = Lampsilis straminea

Unio occidentalis Con. = Ptychobranchus occidentalis

Unio ochraceus Say = Atlanticoncha ochracea
+ Mytilus fluviatilis Gmelin, 1791
+ Unio rosaceus Conrad, 1849
+ Lampsilis rosea Rafinesque, 1820
+ Lampsilis pallida Rafinesque, 1820

Unio ochraceus Say = Lampsilis cariosa

Unio ogeecheensis Con. = Villosa delumbis

Unio olivarius Raf. = Obovaria olivaria
+ Unio ellipsis Lea, 1828

Unio oratus Con. = Lampsilis cariosa

Unio orbiculatus Hild., 1828 = Lampsilis abrupta
+ Unio abruptus Say, 1831
+ Margarita (Unio) orbiculatus Lea, 1836
+ Unio crassus Conrad, 1836

Unio orbiculatus Hild., 1828 = Obovaria subrotunda

Unio oviformis Con. = Pleurobema oviforme

Unio paliatus Lea, 1845 = Elliptio complanata

Unio pallescens Lea, 1845 = Lampsilis straminea

Unio paludicolor [sic] Gould = Uniomerus carolinianus

Unio papyraceus Gould = Villosa amygdalum

Unio parvus Barnes = Toxolasma parvum

Unio paulus Lea = Toxolasma paulum

Unio pectitus Con. = Epioblasma obliquata

Unio pectorosus Con., 1834 = Ortmanniana pectorosa
+ Unio perdix Lea, 1834

Unio pellucidus Lea, 1845 = Villosa vibex

Unio penitus Con. = Epioblasma penita

Unio pernodosus Lea, 1845 = Pustulosa pustulosa

Unio perovalis Con. = Hamiota perovalis

Unio perovatus Con. = Pleurobema perovatum
+ Unio nux Lea, 1852

Unio personatus Say, 1829 = Epioblasma personata
+ Unio capillaris Lea, 1834
+ Unio pileus Lea, 1831

Unio perstriatus Lea, 1852 = Elliptio arctata

Unio pictus Lea, 1834 = Cambarunio taeniatus

Unio pilaris Lea = Fusconaia subrotunda

Unio placitus Lea, 1852 = Hamiota perovalis

Unio planitaleris [sic] Con. = Elliptio congaraea

Unio plenus Lea, 1842 = Pleurobema plenum

Unio plexus Con., 1836 = Diplodon variabilis
+ Unio pliciferus Lea, 1838
+ Unio subtrapezius Philippi, 1847
+ Unio carbonarius Lea, 1838

Unio plexus Con., 1836 = Sphenonaias plexus

Unio politus Say = Fusconaia subrotunda
+ Unio brevialis Lamarck, 1819
+ Unio brevialis Crouch, 1827
+ Unio subrotundus Lea, 1831

Unio politus Say = Potomida littoralis

Unio powellii Lea, 1852 = Lampsilis powellii

Unio prasinus Con., 1834 = Pustulosa pustulosa
+ Unio schoolcraftensis Lea, 1834

Unio prevostianus Lea, 1852 = Villosa vibex

Unio proximus Lea, 1852 = Leaunio lienosus

Unio pullus Con. = Toxolasma pullus

Unio pulvinulus Lea, 1845 = Pleurobema rubellum

Unio pumilis [sic] Lea, 1838 = Fusconaia masoni

Unio puniceus Haldeman = Cambarunio iris

Unio purpuratus Lam. = Potamilus purpuratus
+ Unio ater Lea, 1829
+ Unio lugubris Say, 1832
+ Unio atra Deshayes, 1832
+ Mya ventricosa Humphrey, 1797

Unio purpuriatus Say, 1829
+ Unio medellinus Lea, 1838

Unio purpuriatus Say, 1829 = Actinonaias medellina

Unio pusillus Lea = Elliptio congaraea

Unio pygmœus [sic] Lea = Platynaias subviridis

Unio quadrulus Raf. = Quadrula quadrula
+ Unio quadrulus ‘Rafinesque’ of Authors
+ Unio asperrimus Lea, 1831
+ Unio lacrymosus Lea, 1828

Unio radiatus Lam. = Cambarunio iris
+ Unio radiatus De Kay, 1843
+ Mya pictorum tenuis Martini & Chemnitz, 1782
+ Unio virginiana Lamarck, 1819
+ Unio oblongatus Wood, 1828

Unio radiatus Lam. = Lampsilis radiata

Unio radiatus Lam. = Elliptio complanata

Unio rangianus Lea, 1838 = Epioblasma rangiana

Unio raveneli Conrad, 1834 = Elliptio icterina
+ Unio confertus Lea, 1834
+ Margarita (Unio) watereensis Lea, 1836

Unio rectus Lam. = Ligumia recta
+ Unio rectus Conrad, 1836
+ Unio (Eurynia) latissima Rafinesque, 1820
+ Unio praelongus Barnes, 1823

Unio reevianus [sic] Lea, 1852 = Lampsilis reeveiana

Unio reflexus Raf. = Obliquaria reflexa
+ Unio cornutus Barnes, 1823

Unio regularis Lea, 1841 = Cambarunio iris

Unio retusus Lam. = Theliderma stapes
+ Unio retusus Say, 1834
+ Obovaria torsa Rafinesque, 1820
+ Unio obtusa Cuvier, 1817

Unio retusus Lam. = Obovaria retusa

Unio rivularis Conrad, 1853 = Uniomerus tetralasmus
+ Unio declivis Conrad, 1836

Unio roanokensis Lea, 1838 = Elliptio roanokensis

Unio rosaceus DeKay = Lampsilis siliquoidea

Unio rotundatus Lam. = Glebula rotundata
+ Unio suborbiculata Lamarck, 1819
+ Obliquaria (Plagiola) decorticata Rafinesque, 1820
+ Unio glebulus Say, 1831
+ Unio subglobosus Lea, 1834

Unio rubellus Con. = Pleurobema rubellum

Unio ruber Raf. = Pleurobema sintoxia
+ Unio pyramidatus Lea, 1831
+ Unio coccineus Jay, 1850

Unio rudis Conrad, 1837 = Pleurobema oviforme
+ Unio ravenelianus Lea, 1834

Unio rufusculus Lea, 1852 = Elliptio congaraea

Unio rumphianus Lea, 1852 = Quadrula quadrula

Unio sagittiformis Lea, 1852 = Parvaspina lanceolata

Unio sapotalensis Lea = Actinonaias sapotalensis

Unio satur Lea, 1852 = Lampsilis satura

Unio saxeus Con. = Leaunio lienosus

Unio securiformis Con. = Pustulosa infucata

Unio semigranosus V. d. Busch = Psoronaias semigranosa

Unio shepardianus Lea, 1834 = Elliptio shepardiana