1. Species Bythiospeum acicula (Held, 1838)
2. Species Bythiospeum aciculoides (Clessin, 1909)
3. Species Bythiospeum alpinum R. Bernasconi, 1988
4. Species Bythiospeum alzense Boeters, 2001
5. Species Bythiospeum anglesianum (Westerlund, 1890)
6. Species Bythiospeum articense R. Bernasconi, 1985
7. Species Bythiospeum bechevi Georgiev & Glöer, 2013
8. Species Bythiospeum bormanni (Stojaspal, 1978)
9. Species Bythiospeum bourguignati (Paladilhe, 1866)
10. Species Bythiospeum bournense H. Girardi, 2009
11. Species Bythiospeum bressanum R. Bernasconi, 1985
12. Species Bythiospeum charpyi (Paladilhe, 1867)
13. Species Bythiospeum cisterciensorum (P. L. Reischütz, 1983)
14. Species Bythiospeum claisei H. Girardi, 2017
15. Species Bythiospeum clessini (Weinland, 1883)
16. Species Bythiospeum curtum (Nicolas, 1891)
17. Species Bythiospeum demattiai Glöer & Pešić, 2014
18. Species Bythiospeum dervovici Glöer & Mulaomerović, 2021
19. Species Bythiospeum diaphanoides R. Bernasconi, 1985
20. Species Bythiospeum diaphanum (Michaud, 1831)
21. Species Bythiospeum dorvani R. Bernasconi, 1985
22. Species Bythiospeum dourdeni Georgiev, 2012
23. Species Bythiospeum drouetianum (Clessin, 1882)
24. Species Bythiospeum dubium (Geyer, 1904)
25. Species Bythiospeum elseri (A. Fuchs, 1929)
26. Species Bythiospeum excelsior (Mahler, 1950)
27. Species Bythiospeum excessum (Mahler, 1950)
28. Species Bythiospeum exiguum (Geyer, 1904)
29. Species Bythiospeum francomontanum R. Bernasconi, 1973
30. Species Bythiospeum gardonense H. Girardi, 2009
31. Species Bythiospeum garnieri (Sayn, 1889)
32. Species Bythiospeum gebhardti J. Wágner, 1931
33. Species Bythiospeum geyeri (A. Fuchs, 1925)
34. Species Bythiospeum gonostoma (Geyer, 1905)
35. Species Bythiospeum goviensis (Geyer, 1907)
36. Species Bythiospeum haessleini (Zwanziger, 1939)
37. Species Bythiospeum haeussleri (Clessin, 1890)
38. Species Bythiospeum heldii (Clessin, 1909)
39. Species Bythiospeum helveticum (Clessin, 1882)
40. Species Bythiospeum hrustovoense Glöer & Grego, 2015
41. Species Bythiospeum husmanni (C. R. Boettger, 1963)
42. Species Bythiospeum iltchoi Georgiev & Glöer, 2015
43. Species Bythiospeum iltchokolevi Georgiev & Glöer, 2015
44. Species Bythiospeum jazzi Georgiev & Glöer, 2013
45. Species Bythiospeum josianae H. Girardi, Wienin, M. Girardi & Racamond, 2017
46. Species Bythiospeum juliae Georgiev & Glöer, 2015
47. Species Bythiospeum klemmi (Boeters, 1969)
48. Species Bythiospeum kolevi Georgiev, 2013
49. Species Bythiospeum labiatum (Geyer, 1904)
50. Species Bythiospeum lamperti (Geyer, 1907)
51. Species Bythiospeum leruthi (C. R. Boettger, 1940)
52. Species Bythiospeum michaudi (Locard, 1883)
53. Species Bythiospeum moussonianum (Paladilhe, 1869)
54. Species Bythiospeum nemausense H. Girardi, 2012
55. Species Bythiospeum nocki Haase, Weigand & Haseke, 2000
56. Species Bythiospeum nolli (Bolling, 1938)
57. Species Bythiospeum noricum (A. Fuchs, 1929)
58. Species Bythiospeum oshanovae (L. Pintér, 1968)
59. Species Bythiospeum pandurskii Georgiev, 2012
60. Species Bythiospeum pellucidum (Seckendorf, 1846)
61. Species Bythiospeum petroedei Glöer & Grego, 2015
62. Species Bythiospeum pfeifferi (Clessin, 1890)
63. Species Bythiospeum photophilum (Geyer, 1907)
64. Species Bythiospeum plivense Glöer & Grego, 2015
65. Species Bythiospeum priei H. Girardi, 2017
66. Species Bythiospeum puerkhaueri (Clessin, 1877)
67. Species Bythiospeum putei (Geyer, 1904)
68. Species Bythiospeum quenstedti (Wiedersheim, 1873)
69. Species Bythiospeum racovitzai (Germain, 1911)
70. Species Bythiospeum reisalpense (P. L. Reischütz, 1983)
71. Species Bythiospeum rhenanum (Lais, 1935)
72. Species Bythiospeum sandbergeri (Flach, 1886)
73. Species Bythiospeum saxigenum (Geyer, 1905)
74. Species Bythiospeum senefelderi (Geyer, 1907)
75. Species Bythiospeum simovi Georgiev, 2013
76. Species Bythiospeum steinheimense (Gottschick, 1921) †
77. Species Bythiospeum sterkianum (Clessin, 1882)
78. Species Bythiospeum suevicum (Geyer, 1905)
79. Species Bythiospeum taxisi (Geyer, 1907)
80. Species Bythiospeum terveri (Locard, 1883)
81. Species Bythiospeum transsylvanicum (Rotarides, 1943)
82. Species Bythiospeum tschapecki (Clessin, 1878)
83. Species Bythiospeum turritum (Clessin, 1877)
84. Species Bythiospeum vallei (Fo. Giusti & Pezzoli, 1976)
85. Species Bythiospeum valqueyrasense H. Girardi, 2015
86. Species Bythiospeum waegelei (Hässlein, 1938)
87. Species Bythiospeum wiaaiglica A. Reischütz & P. L. Reischütz, 2006
88. Species Bythiospeum zwanzigeri (Hasslein, 1942)
89. Subgenus Bythiospeum (Paladilhiopsis) Pavlović, 1913 accepted as Paladilhiopsis Pavlović, 1913
    1. Species Bythiospeum (Paladilhiopsis) grobbeni (Kuščer, 1928) accepted as Paladilhiopsis grobbeni Kuščer, 1928
    2. Species Bythiospeum (Paladilhiopsis) robicianum (Clessin, 1882) accepted as Paladilhiopsis robiciana (Clessin, 1882)
90. Species Bythiospeum allingense (Clessin, 1877) accepted as Bythiospeum acicula (Held, 1838)
91. Species Bythiospeum alpillense H. Girardi, 2009 accepted as Bythiospeum diaphanum alpillense H. Girardi, 2009 (unaccepted rank)
92. Species Bythiospeum blihense Glöer & Grego, 2015 accepted as Paladilhiopsis blihensis (Glöer & Grego, 2015) (original combination)
93. Species Bythiospeum blihensis [sic] accepted as Bythiospeum blihense Glöer & Grego, 2015 accepted as Paladilhiopsis blihensis (Glöer & Grego, 2015) (incorrect gender agreement of specific epithet)
94. Species Bythiospeum bogici Pešić & Glöer, 2012 accepted as Montenegrospeum bogici (Pešić & Glöer, 2012) (original combination)
95. Species Bythiospeum buresi (A. J. Wagner, 1928) accepted as Paladilhiopsis buresi A. J. Wagner, 1928 accepted as Saxurinator buresi (A. J. Wagner, 1928) (unaccepted combination)
96. Species Bythiospeum carpathicum (Soós, 1940) accepted as Paladilhiopsis carpathica (L. Soós, 1940) (unaccepted combination)
97. Species Bythiospeum copiosum (Angelov, 1972) accepted as Paladilhiopsis buresi copiosus Angelov, 1972 accepted as Paladilhiopsis buresi A. J. Wagner, 1928 accepted as Saxurinator buresi (A. J. Wagner, 1928) (unaccepted rank)
98. Species Bythiospeum devetakium Georgiev & Glöer, 2013 accepted as Devetakiola devetakia (Glöer & Georgiev, 2013)
99. Species Bythiospeum fernetense H. Girardi, 2009 accepted as Bythiospeum diaphanum fernetense H. Girardi, 2009 (unaccepted rank)
100. Species Bythiospeum gittenbergeri (A. Reischütz & P. L. Reischütz, 2008) accepted as Paladilhiopsis gittenbergeri (A. Reischütz & P. L. Reischütz, 2008) (unaccepted > superseded combination)
101. Species Bythiospeum gloriae Rolán & Martínez-Ortí, 2003 accepted as Spiralix gloriae (Rolán & Martínez-Ortí, 2003)
102. Species Bythiospeum hrustovoensis [sic] accepted as Bythiospeum hrustovoense Glöer & Grego, 2015 (incorrect gender agreement of specific epithet)
103. Species Bythiospeum hungaricum (Soós, 1927) accepted as Iglica hungarica (Soós, 1927) (unaccepted combination)
104. Species Bythiospeum maroskoi Glöer & Grego, 2015 accepted as Paladilhiopsis maroskoi (Glöer & Grego, 2015) (original combination)
105. Species Bythiospeum michaelleae H. Girardi, 2002 accepted as Bythiospeum michaellense H. Girardi, 2002 accepted as Bythiospeum diaphanum michaellense H. Girardi, 2002 (incorrect subsequent spelling)
106. Species Bythiospeum michaellense H. Girardi, 2002 accepted as Bythiospeum diaphanum michaellense H. Girardi, 2002 (unaccepted rank)
107. Species Bythiospeum montbrunense H. Girardi & Bertrand, 2009 accepted as Bythiospeum diaphanum montbrunense H. Girardi & Bertrand, 2009 (unaccepted rank)
108. Species Bythiospeum neglectissimum Falniowski & Šteffek, 1989 accepted as Falniowskia neglectissima (Falniowski & Šteffek, 1989) (basionym)
109. Species Bythiospeum plivensis [sic] accepted as Bythiospeum plivense Glöer & Grego, 2015 (incorrect gender agreement of specific epithet)
110. Species Bythiospeum rasini H. Girardi, 2004 accepted as Meyrargueria rasini (H. Girardi, 2004) (unaccepted > superseded combination)
111. Species Bythiospeum sarriansense H. Girardi, 2009 accepted as Bythiospeum diaphanum sarriansense H. Girardi, 2009 (unaccepted rank)
112. Species Bythiospeum schniebsae Georgiev, 2011 accepted as Balkanospeum schniebsae (Georgiev, 2011) (original combination)
113. Species Bythiospeum stoyanovi Georgiev, 2013 accepted as Stoyanovia stoyanovi (Georgiev, 2013) (original combination)
114. Species Bythiospeum szarowskae Glöer, Grego, Erőss & Fehér, 2015 accepted as Paladilhiopsis szarowskae (Glöer, Grego, Erőss & Fehér, 2015) (original combination)
115. Species Bythiospeum tellinii Pollonera, 1887 accepted as Iglica tellinii (Pollonera, 1886) (basionym)
116. Species Bythiospeum turgens Dehm, 1971 † accepted as Bythiospeum acicula (Held, 1838) (uncertain synonym)

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