1. Species Hemiaulus arcticus Grunow
2. Species Hemiaulus curvatuloides J.Witkowski, 2022 †
3. Species Hemiaulus danosuecicus Cleve-Euler
4. Species Hemiaulus februatus P.A.C.Heiberg
5. Species Hemiaulus hostilis P.A.C.Heiberg
6. Species Hemiaulus hyperboreus Grunow
7. Species Hemiaulus imperator J.Witkowski, 2022 †
8. Species Hemiaulus incurvus K.G.Schibkova in A.I.Krotov & K.G.Schibkova, 1959 †
9. Species Hemiaulus jordani J.Witkowski, 2022 †
10. Species Hemiaulus membranaceus Cleve
11. Species Hemiaulus mesolepta (A.Grunow) J.Witkowski, 2020 †
12. Species Hemiaulus oreshkinae J.Witkowski, 2022 †
13. Species Hemiaulus originalis A.I.Krotov in A.I.Krotov & K.G.Schibkova, 1959 †
14. Species Hemiaulus peripterus Fenner, 1984 †
15. Species Hemiaulus pileolus
16. Species Hemiaulus polycystinorum
17. Species Hemiaulus polymorphus Grunow
18. Species Hemiaulus rectus
19. Species Hemiaulus centralitenuis R.Ross & P.A.Sims, 1977 † accepted as Maluina centralitenuis (R.Ross & P.A.Sims) R.Ross & P.A.Sims, 1987 †
20. Species Hemiaulus ciesielskii Fenner, 1991 † accepted as Proboscia ciesielskii (Fenner) J.Witkowski, 2020 †
21. Species Hemiaulus ornithocephalus Greville accepted as Briggera ornithocephala (Greville) Ross & Sims, 1985 † accepted as Hemiaulus ornithocephalus var. ornithocephalus Greville, 1865 (synonym)
22. Species Hemiaulus rusticus Frenguelli & Orlando, 1958 (unaccepted > nomen nudum, invalidly published)
23. Species Hemiaulus affixus Ross, 1971 (uncertain > unassessed)
24. Species Hemiaulus alatus Greville, 1865 accepted as Williamriedelia alata (Grev.) S.Blanco & C.E.Wetzel, 2016 † (uncertain > unassessed)
25. Species Hemiaulus algidus Grunow, 1884 (uncertain > unassessed)
26. Species Hemiaulus altar Brun, 1896 † accepted as Williamriedelia altar (Brun) S.Blanco & C.E.Wetzel, 2016 † (uncertain > unassessed)
27. Species Hemiaulus altus Hajós, 1974 (uncertain > unassessed)
28. Species Hemiaulus ambiguus Janisch in Schmidt et al., 1888 (uncertain > unassessed)
29. Species Hemiaulus andrewsi Hajós, 1974 (uncertain > unassessed)
30. Species Hemiaulus angularis Leuduger-Fortmorel, 1898 (uncertain > unassessed)
31. Species Hemiaulus angustobrachiatus M.P. Olney in Olney et al., 2007 (uncertain > unassessed)
32. Species Hemiaulus angustus Greville, 1865 (uncertain > unassessed)
33. Species Hemiaulus antarcticus Ehrenberg, 1844 (uncertain > unassessed)
34. Species Hemiaulus antiquus Jousé, 1951 (uncertain > unassessed)
35. Species Hemiaulus applanatus Brun, 1891 (uncertain > unassessed)
36. Species Hemiaulus armatus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
37. Species Hemiaulus asymmetricus Jousé, 1951 (uncertain > unassessed)
38. Species Hemiaulus australis Ehrenberg, 1844 (uncertain > unassessed)
39. Species Hemiaulus barbadensis Grunow, 1884 (uncertain > unassessed)
40. Species Hemiaulus biddulphia Leuduger-Fortmorel, 1898 (uncertain > unassessed)
41. Species Hemiaulus biharensis Pantocsek, 1892 (uncertain > unassessed)
42. Species Hemiaulus bipons (Ehrenberg) Grunow in Van Heurck, 1882 accepted as Zygoceros bipons Ehrenberg, 1844 (1845) (uncertain > unassessed)
43. Species Hemiaulus bombus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
44. Species Hemiaulus californicus Ehrenberg, 1854 (uncertain > unassessed)
45. Species Hemiaulus capitatus Greville, 1865 (uncertain > unassessed)
46. Species Hemiaulus caracteristicus Hajós, 1976 (uncertain > unassessed)
47. Species Hemiaulus caverna Brun, 1891 (uncertain > unassessed)
48. Species Hemiaulus chinensis Greville, 1865 (uncertain > unassessed)
49. Species Hemiaulus circularis Leuduger-Fortmorel, 1898 (uncertain > unassessed)
50. Species Hemiaulus claviger Schmidt in Schmidt et al., 1888 (uncertain > unassessed)
51. Species Hemiaulus coronatus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
52. Species Hemiaulus crenatus Greville, 1865 (uncertain > unassessed)
53. Species Hemiaulus curvatulus N.I. Strelnikova, 1971 † (uncertain)
54. Species Hemiaulus danicus Grunow, 1884 (uncertain > unassessed)
55. Species Hemiaulus delicatulus Lemmermann, 1905 (uncertain > unassessed)
56. Species Hemiaulus dissimilis Grove & Sturt, 1887 (uncertain > unassessed)
57. Species Hemiaulus diversus Grunow, 1884 (uncertain > unassessed)
58. Species Hemiaulus dubius Grunow, 1884 (uncertain > unassessed)
59. Species Hemiaulus echinulatus Jousé in Proshkina-Lavrenko, 1949 (uncertain > unassessed)
60. Species Hemiaulus elegans (P.A.C.Heiberg) Grunow, 1884 (uncertain > unassessed)
61. Species Hemiaulus exiguus Greville, 1865 (uncertain > unassessed)
62. Species Hemiaulus exsculptus (Heiberg) Schütt, 1896 (uncertain > unassessed)
63. Species Hemiaulus florifer Leuduger-Fortmorel, 1898 (uncertain > unassessed)
64. Species Hemiaulus fragilis Jousé, 1949 (uncertain > unassessed)
65. Species Hemiaulus giganteus N.I.Strelnikova accepted as Hemiaulus fragilis Jousé, 1949 (uncertain > unassessed)
66. Species Hemiaulus giganteus H.J. Schrader & J. Fenner, 1976 (uncertain > unassessed)
67. Species Hemiaulus glacialis Castracane, 1886 (uncertain > unassessed)
68. Species Hemiaulus gleseri Hajós, 1974 (uncertain > unassessed)
69. Species Hemiaulus gondolaformis Fenner, 1984 (uncertain > unassessed)
70. Species Hemiaulus grassus Fenner, 1984 (uncertain > unassessed)
71. Species Hemiaulus grunowii Pantocsek, 1892 (uncertain > unassessed)
72. Species Hemiaulus haitensis Ross, 1971 (uncertain > unassessed)
73. Species Hemiaulus hastatus Greville, 1865 (uncertain > unassessed)
74. Species Hemiaulus hauckii Grunow ex Van Heurck, 1882 (uncertain > unassessed)
75. Species Hemiaulus heibergii Cleve, 1873 (uncertain > unassessed)
76. Species Hemiaulus hungaricus Pantocsek, 1886 (uncertain > unassessed)
77. Species Hemiaulus hyalinus Krotov in Krotov & Schibkova, 1959 (uncertain > unassessed)
78. Species Hemiaulus immanis (Boyer) Hendey & Sims, 1984 accepted as Biddulphia immanis Boyer, 1922 (uncertain > unassessed)
79. Species Hemiaulus inaequilaterus Gombos, 1976 (uncertain > unassessed)
80. Species Hemiaulus incisus Hajós, 1976 † accepted as Fennerbicornis incisus (Hajós) Blanco, 2020 † (uncertain > unassessed, Homotypic Synonym)
81. Species Hemiaulus includens Grunow, 1884 (uncertain > unassessed)
82. Species Hemiaulus indicus Karsten, 1907 (uncertain > unassessed)
83. Species Hemiaulus kittonii Grunow in Van Heurck, 1883 † accepted as Fennerbicornis kittonii (Grunow) Blanco, 2020 † (uncertain > unassessed, Homotypic Synonym)
84. Species Hemiaulus klushnikovii Gleser in Scheschukova-Poretzkaya & Gleser, 1964 (uncertain > unassessed)
85. Species Hemiaulus kondai Hajós, 1974 (uncertain > unassessed)
86. Species Hemiaulus laevissimus Grunow, 1884 (uncertain > unassessed)
87. Species Hemiaulus latus A.P. Jousé, 1948 (uncertain > unassessed)
88. Species Hemiaulus lobatus Greville, 1865 (uncertain > unassessed)
89. Species Hemiaulus longicornis Greville, 1865 accepted as Williamriedelia longicornis (Grev.) S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
90. Species Hemiaulus longispinosus Woodhead & Tweed, 1960 (uncertain > unassessed)
91. Species Hemiaulus loricatus (J.Fenner) I.Suto, 2008 † accepted as Goniothecium loricatum J.Fenner, 1976 † (uncertain > unassessed)
92. Species Hemiaulus lyriformis Greville accepted as Williamriedelia lyriformis (Grev.) S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
93. Species Hemiaulus malleolus Pantocsek, 1886 (uncertain > unassessed)
94. Species Hemiaulus marplatensis Frenguelli, 1928 (uncertain > unassessed)
95. Species Hemiaulus menisculus Jousé, 1951 (uncertain > unassessed)
96. Species Hemiaulus minimus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
97. Species Hemiaulus minutus Greville, 1865 (uncertain > unassessed)
98. Species Hemiaulus mirus Schmidt in Schmidt et al., 1888 (uncertain > unassessed)
99. Species Hemiaulus mitra Grunow (uncertain > unassessed)
100. Species Hemiaulus monicae Grunow, 1884 (uncertain > unassessed)
101. Species Hemiaulus moniliformis Leuduger-Fortmorel, 1898 (uncertain > unassessed)
102. Species Hemiaulus mucronatus Greville, 1865 (uncertain > unassessed)
103. Species Hemiaulus novocastrensis Ross, 1971 (uncertain > unassessed)
104. Species Hemiaulus nudus Hajós, 1968 (uncertain > unassessed)
105. Species Hemiaulus obtusus Ehrenberg, 1844 (uncertain > unassessed)
106. Species Hemiaulus orthoceras Strelnikova, 1974 (uncertain > unassessed)
107. Species Hemiaulus pacificus (P.A.Sims) A.M.Gombos, Jr. & P.F.Ciesielski accepted as Cerataulus pacificus Hajós, 1976 (uncertain > unassessed)
108. Species Hemiaulus payeri Grunow, 1884 (uncertain > unassessed)
109. Species Hemiaulus perlongus Pantocsek, 1889 (uncertain > unassessed)
110. Species Hemiaulus petasiformis Pantocsek, 1886 (uncertain > unassessed)
111. Species Hemiaulus plicatus Sheshukova-Poretskaya, 1967 (uncertain > unassessed)
112. Species Hemiaulus podagricus (Greville) Grunow (uncertain > unassessed)
113. Species Hemiaulus prolongatus Ross & Sims, 1977 (uncertain > unassessed)
114. Species Hemiaulus proteus Heiberg, 1863 (uncertain > unassessed)
115. Species Hemiaulus pulvinatus Greville, 1865 (uncertain > unassessed)
116. Species Hemiaulus punctatus Greville, 1865 (uncertain > unassessed)
117. Species Hemiaulus pungens Grunow, 1884 (uncertain > unassessed)
118. Species Hemiaulus pyxilloides Schrader & Fenner, 1976 (uncertain > unassessed)
119. Species Hemiaulus reflexispinosus Ross & Sims, 1977 (uncertain > unassessed)
120. Species Hemiaulus regina (Heiberg) Schütt, 1896 (uncertain > unassessed)
121. Species Hemiaulus reticularis J. Brun, 1896 (uncertain > unassessed)
122. Species Hemiaulus reticulatus Greville, 1865 (uncertain > unassessed)
123. Species Hemiaulus robustus Greville, 1865 (uncertain > unassessed)
124. Species Hemiaulus rossicus Pantocsek, 1889 (uncertain > unassessed)
125. Species Hemiaulus rostratus Pantocsek, 1892 (uncertain > unassessed)
126. Species Hemiaulus saratovianus Pantocsek, 1889 (uncertain > unassessed)
127. Species Hemiaulus schmidti Hajós, 1974 (uncertain > unassessed)
128. Species Hemiaulus sibericus Grunow, 1884 (uncertain > unassessed)
129. Species Hemiaulus simplex Brun, 1894 (uncertain > unassessed)
130. Species Hemiaulus simulacrum (Grove & Sturt) Laporte & Lefebure, 1930 (uncertain > unassessed)
131. Species Hemiaulus sinensis Greville, 1865 (uncertain > unassessed)
132. Species Hemiaulus solenoceros (Ehrenberg) Boyer, 1900 accepted as Triceratium solenoceros var. solenoceros Ehrenberg, 1844 (1845) (uncertain > unassessed)
133. Species Hemiaulus speciosus Jousé, 1951 (uncertain > unassessed)
134. Species Hemiaulus spinosus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
135. Species Hemiaulus sporalis N.I. Strelnikova, 1971 † (uncertain)
136. Species Hemiaulus stabilus J. Fenner, 1978 (uncertain > unassessed)
137. Species Hemiaulus subacutus Grunow, 1884 (uncertain > unassessed)
138. Species Hemiaulus subsymmetricus Grunow, 1884 (uncertain > unassessed)
139. Species Hemiaulus symmetricus Greville, 1865 (uncertain > unassessed)
140. Species Hemiaulus taurus Gombos in Gombos & Ciesielski, 1983 (uncertain > unassessed)
141. Species Hemiaulus tenuicornis Greville accepted as Williamriedelia tenuicornis (Grev.) S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
142. Species Hemiaulus tschestnovii Pantocsek, 1889 (uncertain > unassessed)
143. Species Hemiaulus tubulosus J. Brun, 1896 (uncertain > unassessed)
144. Species Hemiaulus tumidocornus N.I. Strelnikova, 1971 † (uncertain)
145. Species Hemiaulus undulatus Jousé, 1951 (uncertain > unassessed)
146. Species Hemiaulus unicornutus Brun, 1891 (uncertain > unassessed)
147. Species Hemiaulus velatus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
148. Species Hemiaulus verrucosus Brun, 1894 (uncertain > unassessed)
149. Species Hemiaulus vitreus Gombos, 1983 (uncertain > unassessed)
150. Species Hemiaulus vulgaris Leuduger-Fortmorel, 1898 (uncertain > unassessed)
151. Species Hemiaulus walfishii Leuduger-Fortmorel, 1898 (uncertain > unassessed)
152. Species Hemiaulus weissflogii Pantocsek, 1892 (uncertain > unassessed)
153. Species Hemiaulus weissii Grunow, 1884 (uncertain > unassessed)
154. Species Hemiaulus wittii Grunow, 1884 (uncertain > unassessed)

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