1. Subgenus Bythinia (Assiminea) J. Fleming, 1828 accepted as Assiminea J. Fleming, 1828
   1. Species Bythinia (Assiminea) capitata Mayer-Eymar, 1900 † accepted as Potamolithus capitatus (Mayer-Eymar, 1900) † (unaccepted > superseded combination)
2. Subgenus Bythinia (Bythinella) Moquin-Tandon, 1856 accepted as Bythinella Moquin-Tandon, 1856 (original rank)
   1. Species Bythinia (Bythinella) ferussina (Des Moulins, 1827) accepted as Bythinella ferussina (Des Moulins, 1827) (unaccepted > superseded combination)
   2. Species Bythinia (Bythinella) marginata (Michaud, 1831) accepted as Belgrandia marginata (Michaud, 1831)
   3. Species Bythinia (Bythinella) angelitae Haase, Wilke & Mildner, 2007 represented as Bythinella angelitae Haase, Wilke & Mildner, 2007
3. Subgenus Bythinia (Digyreidum) Fischer, 1885 accepted as Bithynia Leach, 1818 (The name was proposed as an emendation of Digyreidum Locard, but not used as valid, and hence is not an available name)
   1. Species Bythinia (Digyreidum) servainiana (A. Letourneux, 1887) (uncertain > taxon inquirendum)
4. Subgenus Bythinia (Elona) Moquin-Tandon, 1856 accepted as Bithynia (Elona) Moquin-Tandon, 1856 accepted as Bithynia Leach, 1818 (misspelling of genus name)
   1. Species Bythinia (Elona) arabica Pallary, 1924 accepted as Bithynia (Elona) arabica Pallary, 1924 (misspelled generic name)
   2. Species Bythinia (Elona) caerulans Westerlund, 1896 accepted as Boreoelona caerulans (Westerlund, 1896) (original combination)
   3. Species Bythinia (Elona) iraqensis Pallary, 1939 (uncertain > taxon inquirendum)
5. Subgenus Bythinia (Gabbia) Tryon, 1865 accepted as Gabbiella Mandahl-Barth, 1968 (a junior synonym)
   1. Species Bythinia (Gabbia) martreti (Germain, 1904) accepted as Bithynia martreti Germain, 1904
   2. Species Bythinia (Gabbia) neothaumaeformis Germain, 1907 accepted as Gabbiella neothaumaeformis (Germain, 1907) (original combination)
6. Subgenus Bythinia (Stalioa) Brusina, 1870 † accepted as Stalioa Brusina, 1870 † (unaccepted > superseded rank)
   1. Species Bythinia (Stalioa) lipoldi Bittner, 1884 † accepted as Nystia lipoldi (Bittner, 1884) † (unaccepted > superseded combination)
7. Species Bythinia adnata Neumayr, 1875 † accepted as Tanousia adnata (Neumayr, 1875) † (unaccepted > superseded combination)
8. Species Bythinia alberti E. A. Smith, 1888 accepted as Gabbiella humerosa alberti (E. A. Smith, 1888) (original combination)
9. Species Bythinia allopoma Westerlund, 1886 accepted as Bithynia tentaculata (Linnaeus, 1758)
10. Species Bythinia almerai Almera, 1894 † accepted as Bithynia almerai Almera, 1894 † (Bythinia is an unjustified emendation of Bithynia)
11. Species Bythinia applanata Blanckenhorn, 1897 † accepted as Bithynia applanata Blanckenhorn, 1897 † (genus misspelt)
12. Species Bythinia ardussonica J. Ray, 1884 accepted as Bithynia tentaculata (Linnaeus, 1758)
13. Species Bythinia aymardi Tournouër, 1869 † accepted as Nystia aymardi (Tournouër, 1869) † (unaccepted > superseded combination)
14. Species Bythinia badiella (Küster, 1853) accepted as Pseudobithynia badiella (Küster, 1853)
15. Species Bythinia baudoniana Gassies, 1859 accepted as Mercuria baudoniana (Gassies, 1859) (original combination)
16. Species Bythinia bauduensis de Lapparent, 1938 † accepted as Bithynia ugernensis Roman, 1912 † (unaccepted > junior subjective synonym)
17. Species Bythinia bayonnensis Locard, 1894 accepted as Mercuria bayonnensis (Locard, 1894) (original combination)
18. Species Bythinia berti Cobălcescu, 1883 † accepted as Viviparus oncophorus Brusina, 1874 † (unaccepted > junior subjective synonym)
19. Species Bythinia bodosensis L. Roth, 1881 † accepted as Tanousia bodosensis (L. Roth, 1881) † (unaccepted > superseded combination)
20. Species Bythinia brevis (Draparnaud, 1805) accepted as Avenionia brevis (Draparnaud, 1805)
21. Species Bythinia brugueriensis Noulet, 1857 † accepted as Hydrobia brugueriensis (Noulet, 1857) † (unaccepted > superseded combination)
22. Species Bythinia brusinai Halaváts, 1902 † accepted as Bithynia brusinai Halaváts, 1902 † (genus misspelt)
23. Species Bythinia budinici Brusina, 1902 † accepted as Bithynia budinici Brusina, 1902 † (Bythinia is an unjustified emendation of Bithynia)
24. Species Bythinia caspia (Eichwald, 1838) accepted as Laevicaspia caspia (Eichwald, 1838) (unaccepted > superseded combination)
25. Species Bythinia cholnokyi Schlosser, 1906 † accepted as Lioplacodes cholnokyi (Schlosser, 1906) † (unaccepted > superseded combination)
26. Species Bythinia clessini Brusina, 1884 † accepted as Bithynia clessini Brusina, 1884 † (Bythinia is an unjustified emendation of Bithynia)
27. Species Bythinia conica Cobălcescu, 1883 † accepted as Viviparus oncophorus Brusina, 1874 † (unaccepted > junior subjective synonym)
28. Species Bythinia contortrix Lindholm, 1909 accepted as Boreoelona contortrix (Lindholm, 1909) (original combination)
29. Species Bythinia conus (Eichwald, 1838) accepted as Turricaspia conus (Eichwald, 1838) accepted as Laevicaspia conus (Eichwald, 1838) (unaccepted > superseded combination)
30. Species Bythinia croatica Pilar, 1874 † accepted as Bithynia croatica Pilar, 1874 † (genus misspelt)
31. Species Bythinia crosseana Wattebled, 1884 accepted as Bithynia crosseana Wattebled, 1884 accepted as Wattebledia crosseana (Wattebled, 1884) (specific epithet combined with unjustified emendation of genus name)
32. Species Bythinia cubillensis Almera & Bofill y Poch, 1895 † accepted as Hydrobia cubillensis (Almera & Bofill y Poch, 1895) † (unaccepted > superseded combination)
33. Species Bythinia delphinensis Locard, 1883 † accepted as Bithynia leberonensis delphinensis Locard, 1883 † (Bythinia is an unjustified emendation of Bithynia; rank changed)
34. Species Bythinia desertorum Bourguignat, 1862 accepted as Pseudamnicola letourneuxianus (Bourguignat, 1862)
35. Species Bythinia dubia Schlosser, 1907 † accepted as Hydrobia schlosseri Royo Gómez, 1928 † (unaccepted > junior homonym, considered a Hydrobia, and thus a junior secondary homonym of H. dubia Etheridge, 1879; H. schlosseri is a replacement name)
36. Species Bythinia dulvertonensis Tenison Woods, 1876 accepted as Austropyrgus simsonianus (Brazier, 1875) (junior synonym)
37. Species Bythinia dunrobinensis Tenison Woods, 1876 accepted as Austropyrgus simsonianus (Brazier, 1875) (junior synonym)
38. Species Bythinia ejecta Mousson, 1874 accepted as Bithynia ejecta Mousson, 1874 (unaccepted > misspelling - incorrect original spelling)
39. Species Bythinia eocaenica K. Miller, 1907 † accepted as Bithynia eocaenica (K. Miller, 1907) † (genus misspelt)
40. Species Bythinia eurycheilos Paladilhe, 1874 † accepted as Hydrobia eurycheilos (Paladilhe, 1874) † (unaccepted > superseded combination)
41. Species Bythinia evezardi W. T. Blanford, 1881 accepted as Neosataria evezardi (W. T. Blanford, 1881) (unaccepted > superseded combination, original combination)
42. Species Bythinia fuchsiana Möllendorff, 1888 accepted as Gabbia fuchsiana (Möllendorff, 1888) (original combination)
43. Species Bythinia gaudryi Pallary, 1901 † accepted as Bithynia gaudryi Pallary, 1901 † (genus misspelt)
44. Species Bythinia gibba (Draparnaud, 1805) accepted as Belgrandia gibba (Draparnaud, 1805) (unaccepted > superseded combination)
45. Species Bythinia globuloides F. Sandberger, 1871 † accepted as Pseudamnicola globuloides (F. Sandberger, 1871) † (unaccepted > superseded combination)
46. Species Bythinia gracilis F. Sandberger, 1872 † accepted as Bithynia glabra glabra (Zieten, 1832) † (unaccepted > junior subjective synonym)
47. Species Bythinia grandis Möllendorff, 1888 accepted as Parafossarulus eximius (Frauenfeld, 1864) (junior synonym)
48. Species Bythinia gravida J. Ray, 1884 accepted as Bithynia tentaculata (Linnaeus, 1758) (a junior synonym)
49. Species Bythinia heleni Cobălcescu, 1883 † accepted as Viviparus oncophorus Brusina, 1874 † (unaccepted > junior subjective synonym)
50. Species Bythinia hispanica Servain, 1880 accepted as Bithynia hispanica Servain, 1880 (basionym)
51. Species Bythinia huonensis Tenison Woods, 1876 accepted as Tatea huonensis (Tenison Woods, 1876) (original combination)
52. Species Bythinia inflata (Hansén, 1846) accepted as Bithynia troschelii (Paasch, 1842) accepted as Bithynia transsilvanica (Bielz, 1853) (unaccepted > junior homonym, invaild: junior homonym of Paludina inflata Villa & Villa, 1841)
53. Species Bythinia jeani Noulet, 1868 † accepted as Hydrobia jeani (Noulet, 1868) † (unaccepted > superseded combination)
54. Species Bythinia jobae Bourguignat, 1862 † accepted as Bythinella jobae (Bourguignat, 1862) † (unaccepted > superseded combination)
55. Species Bythinia jurinaci Brusina, 1884 † accepted as Bithynia jurinaci Brusina, 1884 † (Bythinia is an unjustified emendation of Bithynia)
56. Species Bythinia labiata Neumayr, 1875 † accepted as Neumayria labiata (Neumayr, 1875) † (unaccepted > superseded combination)
57. Species Bythinia letourneuxiana Bourguignat, 1862 accepted as Pseudamnicola letourneuxianus (Bourguignat, 1862) (original combination)
58. Species Bythinia lilliputiana Maillard, 1884 † accepted as Bithynia lilliputiana Maillard, 1884 † (Bythinia is an unjustified emendation of Bithynia)
59. Species Bythinia longicornis (W. H. Benson, 1842) accepted as Gabbia longicornis (W. H. Benson, 1842) (unaccepted combination)
60. Species Bythinia luberonensis P. Fischer & Tournouër, 1873 † accepted as Bithynia leberonensis P. Fischer & Tournouër, 1873 † (genus misspelt)
61. Species Bythinia lucensis Issel, 1866 accepted as Pseudamnicola lucensis (Issel, 1866) (original combination)
62. Species Bythinia manchourica Bourguignat, 1860 accepted as Parafossarulus manchouricus (Bourguignat, 1860) (original combination)
63. Species Bythinia marasinica Andrusov, 1909 † accepted as Bithynia marasinica Andrusov, 1909 † (genus misspelt)
64. Species Bythinia marginata (Michaud, 1831) accepted as Belgrandia marginata (Michaud, 1831)
65. Species Bythinia meneghiniana Issel, 1865 accepted as Turricaspia meneghiniana (Issel, 1865) (unaccepted > superseded combination)
66. Species Bythinia misella Gredler, 1884 accepted as Gabbia misella (Gredler, 1884) (original combination)
67. Species Bythinia moltschanovi Lindholm, 1915 accepted as Boreoelona caerulans moltschanovi (Lindholm, 1915) (unaccepted > superseded combination)
68. Species Bythinia monthiersi Carez, 1881 † accepted as Bithynia monthiersi Carez, 1881 † (genus misspelt)
69. Species Bythinia moreletiana (G. Nevill, 1877) accepted as Gabbia moreletiana (G. Nevill, 1877) (unaccepted combination)
70. Species Bythinia multisulcata Bourguignat, 1888 accepted as Mysorelloides multisulcata (Bourguignat, 1888) (unaccepted > superseded combination)
71. Species Bythinia neumayri Cobălcescu, 1883 † accepted as Viviparus oncophorus Brusina, 1874 † (unaccepted > junior subjective synonym)
72. Species Bythinia neyronensis Locard, 1883 † accepted as Bithynia leberonensis neyronensis Locard, 1883 † (Bythinia is an unjustified emendation of Bithynia; rank changed)
73. Species Bythinia ovatula F. Sandberger, 1880 † accepted as Bithynia ovatula F. Sandberger, 1880 † (genus misspelt)
74. Species Bythinia paeteli (Gredler, 1885) accepted as Gabbia paeteli (Gredler, 1885) (unaccepted combination)
75. Species Bythinia parva Locard, 1893 accepted as Bithynia tentaculata (Linnaeus, 1758)
76. Species Bythinia perforata Bourguignat, 1862 accepted as Pseudamnicola dupotetianus (Forbes, 1838)
77. Species Bythinia pilari Neumayr, 1875 † accepted as Bithynia pilari Neumayr, 1875 † (Bythinia is an unjustified emendation of Bithynia)
78. Species Bythinia podwinensis Neumayr, 1875 † accepted as Neumayria podwinensis (Neumayr, 1875) † (unaccepted > superseded combination)
79. Species Bythinia pontvillensis Tenison Woods, 1876 accepted as Austropyrgus simsonianus (Brazier, 1875) (junior synonym)
80. Species Bythinia praecursor F. Sandberger, 1870 † accepted as Bithynia praecursor F. Sandberger, 1870 † (genus misspelt)
81. Species Bythinia pumila Brusina, 1884 † accepted as Pseudamnicola pumilus (Brusina, 1884) † (unaccepted > superseded combination)
82. Species Bythinia pycnocheilia Bourguignat, 1862 accepted as Mercuria pycnocheilia (Bourguignat, 1862) (original combination)
83. Species Bythinia pycnolena Bourguignat, 1862 accepted as Pseudamnicola dupotetianus (Forbes, 1838)
84. Species Bythinia robusta (H. Adams, 1870) accepted as Gabbia robusta (H. Adams, 1870) (unaccepted combination)
85. Species Bythinia rothi Brusina, 1884 † accepted as Bythinella rothi (Brusina, 1884) † (unaccepted > superseded combination)
86. Species Bythinia rumana Porumbaru, 1881 † accepted as Bithynia vukotinovici Brusina, 1874 † (unaccepted > junior subjective synonym)
87. Species Bythinia sautieri Maillard, 1884 † accepted as Bithynia sautieriana (de Loriol, 1865) † (unaccepted > unjustified emendation, unjustified emendation of Paludina sautieriana de Loriol in de Loriol & Jaccard, 1865)
88. Species Bythinia saviana Issel, 1866 accepted as Belgrandia thermalis (Linnaeus, 1767) (a junior synonym)
89. Species Bythinia schwabii Frauenfeld, 1865 accepted as Bithynia schwabii Frauenfeld, 1865 (basionym)
90. Species Bythinia sebethina Coutagne, 1881 accepted as Bithynia tentaculata (Linnaeus, 1758)
91. Species Bythinia shuttleworthi (Frauenfeld, 1862) accepted as Gabbia longicornis (W. H. Benson, 1842) (junior synonym)
92. Species Bythinia socialis Westerlund, 1886 accepted as Paraelona socialis (Westerlund, 1886) (unaccepted > superseded combination)
93. Species Bythinia speciosa Cobălcescu, 1883 † accepted as Tylopoma speciosa (Cobălcescu, 1883) † (unaccepted > superseded combination)
94. Species Bythinia spoliata Stefanescu, 1896 † accepted as Neumayria spoliata (Stefanescu, 1896) † (unaccepted > superseded combination)
95. Species Bythinia stanleyi E. A. Smith, 1878 accepted as Bithynia stanleyi E. A. Smith, 1878 accepted as Gabbiella stanleyi (E. A. Smith, 1878) (original combination)
96. Species Bythinia stramicensis Locard, 1893 accepted as Bithynia tentaculata (Linnaeus, 1758)
97. Species Bythinia striatula (W. H. Benson, 1842) accepted as Parafossarulus manchouricus (Bourguignat, 1860) (junior homonym of Paludina striatula Deshayes, 1824)
98. Species Bythinia struckmanni Koert, 1898 † accepted as Hydrobia struckmanni (Koert, 1898) † (unaccepted > superseded combination)
99. Species Bythinia subangulata (E. von Martens, 1875) accepted as Parafossarulus eximius (Frauenfeld, 1864) (junior synonym)
100. Species Bythinia subbadiella Bourguignat, 1885 accepted as Gabbiella adspersa (Jickeli, 1874) (junior synonym)
101. Species Bythinia subgracilis Łomnicki, 1886 † accepted as Bithynia glabra subgracilis Łomnicki, 1886 † (superseded rank; genus misspelt)
102. Species Bythinia syriaca Blanckenhorn, 1897 † accepted as Bithynia syriaca Blanckenhorn, 1897 † (genus misspelt)
103. Species Bythinia tentaculata Linnaeus, 1758 accepted as Bithynia tentaculata (Linnaeus, 1758) (Bythinia is an unjustified emendation of Bithynia)
104. Species Bythinia thomasi Pallary, 1901 † accepted as Bithynia thomasi Pallary, 1901 † (genus misspelt)
105. Species Bythinia triton (Eichwald, 1838) (unaccepted > superseded combination)
106. Species Bythinia uzielliana Issel, 1865 (unaccepted > superseded combination, basionym)
107. Species Bythinia variabilis (Eichwald, 1838) (unaccepted > superseded combination)
108. Species Bythinia verrii De Stefani, 1880 † (unaccepted, genus misspelt)
109. Species Bythinia victoriae Tenison Woods, 1878 (unaccepted, junior synonym)
110. Species Bythinia vitzui Cobălcescu, 1883 † (unaccepted > junior subjective synonym)
111. Species Bythinia vukotinovici Brusina, 1874 † (unaccepted, genus misspelt)
112. Species Bythinia walderdorffii Frauenfeld, 1865 (unaccepted, basionym)
113. Species Bythinia walleri E. A. Smith, 1888 (unaccepted, original combination)
114. Species Bythinia zoranici Brusina, 1902 † (unaccepted, Bythinia is an unjustified emendation of Bithynia)
115. Species Bythinia archaea Bourguignat, 1869 † (uncertain > taxon inquirendum)
116. Species Bythinia farezi Bourguignat, 1881 † (uncertain > taxon inquirendum)
117. Species Bythinia gallaeciana Locard, 1894 (uncertain > unassessed)
118. Species Bythinia leptostoma Bourguignat, 1881 † (uncertain > taxon inquirendum)
119. Species Bythinia quadrasi Möllendorff, 1896 (uncertain > taxon inquirendum)
120. Species Bythinia rumelica Wohlberedt, 1911 (uncertain > taxon inquirendum)
121. Species Bythinia tripaloi Bourguignat, 1881 † (uncertain > taxon inquirendum)
122. Species Bythinia tumida Westerlund, 1883 (uncertain > unassessed)
123. Species Bythinia zeni C. Ping & T.-C. Yen, 1932 (uncertain > taxon inquirendum)

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