Musculium lacustre (Müller, 1774) = Sphaerium lacustre
+ Musculium declive Sterki, 1912
+ Cyclas jayensis Prime, 1852
+ Sphaerium lenticula Prime, 1862
+ Musculium pusillum Sterki, 1910
+ Cyclas rosacea Prime, 1852
+ Cyclas ryckholti Normand, 1844
+ Musculium winkleyi Sterki, 1909
+ Musculium rosaceum var. fuliginosum Sterki, 1916
+ Cyclas steinii Schmidt, 1850
+ Sphaerium raymondi Cooper, 1892

Musculium partumeium (Say, 1822) = Sphaerium partumeium
+ Musculium truncatum var. albidum Sterki, 1916
+ Cyclas elevata Haldeman, 1841
+ Calyculina ferrissii Sterki, 1902
+ Calyculina hodgsonii Sterki, 1902
+ Musculium orbiculare Sterki, 1913
+ Cyclas truncata Linsley, 1845
+ Musculium truncatum var. angustatum Sterki, 1916
+ Cyclas calyculata C.B. Adams, 1842
+ Cyclas coerulea Prime, 1852
+ Cyclas eburnea Prime, 1853
+ Musculium partumeium var. globosum Sterki, 1916
+ Cyclas mirabilis Prime, 1852
+ Cyclas orbicularia Linsley, 1845
+ Cyclas pellucida Stimpson, 1851

Musculium securis (Prime, 1852) = Sphaerium securis
+ Musculium australe Sterki, 1916
+ Cyclas cardissa Prime, 1852
+ Musculium parvum Sterki, 1909
+ Cyclas sphaerica Prime, 1853
+ Cyclas crocea Lewis, 1854
+ Musculium sphaericum var. succineum Sterki, 1916

Musculium transversum (Say, 1829) = Sphaerium transversum
+ Sphaerium contractum Prime, 1865
+ Cyclas constricta Prime, 1853
+ Musculium transversum form decisum Sterki, 1916
+ Cyclas detruncata Prime, 1852
+ Cyclas gracilis Prime, 1852
+ Sphaerium subtransversum Prime, 1860

Musculium transversum (Say, 1829) = Sphaerium subtransversum

Pisidium obtusale (Lamarck, 1818) = Euglesa obtusalis
+ Pisidium scholtzi var. lapponicum Westerlund, 1873

Pisidium personatum Malm, 1855 = Euglesa personata
+ Pisidium pusillum Jenyns, 1832

Pisidium (Cyclocalyx) adamsi Stimpson, 1851 = Euglesa adamsii
+ Pisidium affine Sterki, 1901
+ Pisidium deflexum Sterki, 1922
+ Pisidium sargenti Sterki, 1901
+ Pisidium sphaericum Sterki, 1912
+ Cyclas nitida Mighels & Adams, 1842

Pisidium (Cyclocalyx) casertanum (Poli, 1791) = Euglesa casertana
+ Cyclas (Pisidium) abditum Haldeman, 1841
+ Pisidium albidum Sterki, 1911
+ Pisidium alleni Sterki, 1912
+ Pisidium ashmuni Sterki, 1903
+ Pisidium atlanticum Sterki, 1905
+ Pisidium cinereum Alder, 1838
+ Pisidium columbianum Sterki, 1913
+ Pisidium complanatum Sterki, 1903
+ Pisidium cuneiforme Sterki, 1903
+ Pisidium dispar Sterki, 1911
+ Pisidium noveboracense var. elevatum Sterki, 1916
+ Pisidium fabale Sterki, 1916
+ Pisidium friersoni Sterki, 1906
+ Pisidium furcatum Sterki, 1913
+ Pisidium griseolum Sterki, 1922
68 more...

Pisidium (Cyclocalyx) casertanum (Poli, 1791) = Euglesa subtruncata

Pisidium (Cyclocalyx) compressum Prime, 1852 = Euglesa compressa
+ Pisidium altile Prime, 1852
+ Pisidium compressum var. arrosum Sterki, 1905
+ Pisidium compressum var. conferum Sterki, 1905
+ Pisidium compressum var. contrarium Sterki, 1905
+ Pisidium compressum var. coosaense Sterki, 1905
+ Pisidium compressum var. curvatum Sterki, 1916
+ Pisidium fraudulentum Sterki, 1912
+ Pisidium compressum var. illinoisense Sterki, 1916
+ Pisidium compressum var. laevigatum Sterki, 1905
+ Pisidium compressum var. limnicolum Sterki, 1905
+ Pisidium compressum mutatum Sterki, 1922
+ Pisidium compressum var. opacum Sterki, 1905
+ Pisidium compressum var. pellucidum Sterki, 1916
+ Pisidium peraltum Sterki, 1900
+ Pisidium compressum var. rostratum Sterki, 1905
2 more...

Pisidium (Cyclocalyx) equilaterale Prime, 1852 = Euglesa equilateralis
+ Pisidium aequilaterale Prime, 1865

Pisidium (Cyclocalyx) fallax Sterki, 1896 = Euglesa fallax
+ Pisidium fallax var. sepentrionale Sterki, 1898
+ Pisidium fallax var. boreale Sterki, 1899
+ Pisidium fallax var. errans Sterki, 1905
+ Pisidium kirklandi Sterki, 1899
+ Pisidium fallax var. mite Sterki, 1905
+ Pisidium fallax pressum F.C. Baker, 1928

Pisidium (Cyclocalyx) ferrugineum Prime, 1852 = Euglesa ferruginea
+ Pisidium medianum var. clarum Sterki, 1916
+ Pisidium (Fossarina) hibernicum Westerlund, 1894
+ Pisidium medianum Sterki, 1899
+ Pisidium depressum Herrington, 1954
+ Pisidium medianum var. minutum Sterki, 1899
+ Pisidium ohiense Sterki, 1903
+ Pisidium pilula Sterki, 1922
+ Pisidium vexum Sterki, 1916

Pisidium (Cyclocalyx) ferrugineum Prime, 1852 = Euglesa parvula

Pisidium (Cyclocalyx) henslowanum (Sheppard, 1825) = Euglesa henslowana

Pisidium (Cyclocalyx) lilljeborgi Esmark & Hoyer, 1886 = Euglesa lilljeborgii
+ Pisidium lilljeborgi form cristatum Sterki, 1928
+ Pisidium scutellatum Sterki, 1896

Pisidium (Cyclocalyx) milium Held, 1836 = Euglesa milium

Pisidium (Cyclocalyx) nitidum Jenyns, 1832 = Euglesa nitida
+ Pisidium pusillum B.B. Woodward, 1913
+ Pisidium amoenum Herrington, 1954
+ Pisidium glabellum Sterki, 1913
+ Pisidium handwerki Sterki, 1899
+ Pisidium latchfordi Sterki, 1916
+ Pisidium lermondi Sterki, 1913
+ Pisidium limpidum Sterki, 1922
+ Pisidium minusculum Sterki, 1906
+ Pisidium pauperculum Sterki, 1896
+ Pisidium prognathum Sterki, 1922
+ Pisidium splendidulum Sterki, 1898
+ Pisidium tenuissimum Sterki, 1901
+ Pisidium contortum Prime, 1858
+ Pisidium splendidulum var. corneolum Sterki, 1916
+ Pisidium pauperculum var. crystalense Sterki, 1916
6 more...

Pisidium (Cyclocalyx) subtruncatum Malm, 1855 = Euglesa subtruncata
+ Pisidium alpicola Suter, 1889
+ Pisidium apiculatum Sterki, 1922
+ Pisidium marci Sterki, 1909
+ Pisidium overi Sterki, 1913
+ Pisidium masci Ellis, 1962

Pisidium (Cyclocalyx) supinum Schmidt, 1850 = Euglesa supina

Pisidium (Cyclocalyx) ultramontanum Prime, 1865 = Euglesa ultramontana

Pisidium (Cyclocalyx) variabile Prime, 1852 = Euglesa variabilis
+ Pisidium variabile var. brevius Sterki, 1906
+ Pisidium cicer Prime, 1858
+ Pisidium decisum Sterki, 1922
+ Pisidium probum Sterki, 1923
+ Pisidium grande Prime, 1865
+ Pisidium variabile var. hybridum Sterki, 1906
+ Pisidium variabile var. magnum Sterki, 1916
+ Pisidium mirabile Clessin, 1877
+ Pisidium palustre Prime, 1870

Pisidium (Cyclocalyx) ventricosum Prime, 1851 = Euglesa casertana
+ Pisidium ovum Sterki, 1916
+ Pisidium vesiculare var. striatellum Sterki, 1916
+ Pisidium vesiculare Sterki, 1896
+ Pisidium obtusale Pfeiffer, 1821

Pisidium (Cyclocalyx) ventricosum Prime, 1851 = Euglesa ventricosa

Pisidium (Cyclocalyx) ventricosum form rotundatum Prime, 1852 = Euglesa rotundata
+ Pisidium rotundarum Herrington, 1965
+ Corneocyclas tremperi Hannibal, 1912

Pisidium (Cyclocalyx) walkeri Sterki, 1895 = Euglesa walkeri
+ Pisidium walkeri var. mainense Sterki, 1898

Pisidium (Neopisidium) conventus Clessin, 1877 = Conventus conventus
+ Pisidium abyssorum Sterki, 1898
+ Pisidium abortivum Sterki, 1916
+ Pisidium hendersoni Sterki, 1923
+ Pisidium abortivum var. exiguum Sterki, 1916
+ Pisidium imbecille Sterki, 1900
+ Pisidium notophthalmi Sterki, 1922

Pisidium (Neopisidium) cruciatum Sterki, 1895 = Pisidium cruciatum

Pisidium (Neopisidium) insigne Gabb, 1868 = Conventus insigne

Pisidium (Neopisidium) punctatum Sterki, 1895 = Pisidium punctatum
+ Pisidium punctatum var. armatum Sterki, 1905
+ Pisidium hinkleyi Sterki, 1916
+ Pisidium monas Sterki, 1901
+ Pisidium puncatum var. simplex Sterki, 1905

Pisidium (Neopisidium) punctiferum (Guppy, 1867) = Pisidium punctiferum

Pisidium (s.s.) amnicum (Müller, 1774) = Pisidium amnicum
+ Pisidium bakeri Baker, 1900

Pisidium (s.s.) dubium (Say, 1816) = Pisidium dubium
+ Cyclas (Pisidium) abruptum Haldeman, 1841
+ Cyclas (Phymesoda) equalis Rafinesque, 1820
+ Pisidium virginicum Prime, 1865
+ Cyclas aequalis Lamarck, 1835

Pisidium (s.s.) idahoense Roper, 1890 = Pisidium idahoensis
+ Pisidium idahoense var. indianense Sterki, 1905

Sphaerium ovale (Férussac, 1807)
+ Cyclas pallida Prime, 1865

Sphaerium (Herringtonium) occidentale (“Prime” Lewis, 1856) = Sphaerium occidentale
+ Sphaerium occidentale var. amphibium Sterki, 1907
+ Cyclas ovalis Prime, 1853

Sphaerium (s.s.) corneum (Linnaeus, 1758) = Sphaerium corneum
+ Cyclas alata Leach, 1852

Sphaerium (s.s.) fabale (Prime, 1852) = Sphaerium fabale
+ Cyclas castanea Prime, 1852
+ Cyclas sulculosa Prime, 1865

Sphaerium (s.s.) nitidum Westerlund, 1876 = Sphaerium nitidum
+ Cyclas tenuis Prime, 1852
+ Sphaerium uintaense Call, 1886
+ Sphaerium walkeri Sterki, 1901

Sphaerium (s.s.) patella (Gould, 1850) = Sphaerium patella
+ Cyclas nobilis Gould, 1855
+ Sphaerium primeanum Clessin, 1878

Sphaerium (s.s.) rhomboideum (Say, 1822) = Sphaerium rhomboideum
+ Cyclas elegans Adams, 1840

Sphaerium (s.s.) simile (Say, 1816) = Sphaerium simile
+ Sphaerium sulcatum var. albescens Sterki, 1916
+ Sphaerium crassum Sterki, 1901
+ Sphaerium sulcatum dakotense Sterki, 1930
+ Sphaerium sulcatum decisum Brooks & Herrington, 1944
+ Cyclas elliptica Prime, 1870
+ Sphaerium fallax Sterki, 1930
+ Cyclas gigantea Prime, 1852
+ Sphaerium sulcatum var. insigne Sterki, 1916
+ Cyclas (Amesoda) lasmampsis Rafinesque, 1820
+ Cyclas lasmanpsis Lamarck, 1835
+ Sphaerium lineatum Sterki, 1910
+ Sphaerium sulcatum obscurum Brooks & Herrington, 1944
+ Sphaerium sulcatum var. planatum Sterki, 1916
+ Cyclas ponderosa Prime, 1852
+ Cyclas sarratogea Lamarck, 1818
3 more...

Sphaerium (s.s.) striatinum (Lamarck, 1818) = Sphaerium striatinum
+ Cyclas acuminata Prime, 1852
+ Cyclas aurea Prime, 1852
+ Sphaerium declive Sterki, 1922
+ Cyclas (Pisidium) dentata Haldeman, 1841
+ Cyclas emarginata Prime, 1852
+ Cyclas flava Prime, 1852
+ Sphaerium hendersoni Sterki, 1906
+ Sphaerium jalapensis Pilsbry, 1904
+ Sphaerium lilycashense Baker, 1898
+ Cyclas modesta Prime, 1852
+ Sphaerium notatum Sterki, 1927
+ Sphaerium ohiense Sterki, 1913
+ Cyclas solidula Prime, 1852
+ Sphaerium spokani Baird, 1863
+ Cyclas staminea Conrad, 1834
47 more...

Sphaerium (s.s.) striatinum (Lamarck, 1818) = Sphaerium triangulare

Sphaerium (s.s.) striatinum (Lamarck, 1818) = Sphaerium jalapensis

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