1. Species Hypostomus affinis (Steindachner, 1877)
2. Species Hypostomus agna (Miranda Ribeiro, 1907)
3. Species Hypostomus alatus Castelnau, 1855
4. Species Hypostomus albopunctatus (Regan, 1908)
5. Species Hypostomus ancistroides (Ihering, 1911)
6. Species Hypostomus angipinnatus (Leege, 1922)
7. Species Hypostomus annectens (Regan, 1904)
8. Species Hypostomus arecuta Cardoso, Almirón, Casciotta, Aichino, Lizarralde & Montoya-Burgos, 2012
9. Species Hypostomus argus (Fowler, 1943)
10. Species Hypostomus asperatus Castelnau, 1855
11. Species Hypostomus aspilogaster (Cope, 1894)
12. Species Hypostomus atropinnis (Eigenmann & Eigenmann, 1890)
13. Species Hypostomus auroguttatus Kner, 1854
14. Species Hypostomus basilisko Tencatt, Zawadzki & Froehlich, 2014
15. Species Hypostomus bimbai Zawadzki & Penido, 2021
16. Species Hypostomus bolivianus (Pearson, 1924)
17. Species Hypostomus borellii (Boulenger, 1897)
18. Species Hypostomus boulengeri (Eigenmann & Kennedy, 1903)
19. Species Hypostomus brevicauda (Günther, 1864)
20. Species Hypostomus brevis (Nichols, 1919)
21. Species Hypostomus cafuringa Soares, Aquino, Bagley, Langeani & Colli, 2021
22. Species Hypostomus careopinnatus Martins, Marinho, Langeani & Serra, 2012
23. Species Hypostomus carinatus (Steindachner, 1881)
24. Species Hypostomus carvalhoi (Miranda Ribeiro, 1937)
25. Species Hypostomus chrysostiktos Birindelli, Zanata & Lima, 2007
26. Species Hypostomus cochliodon Kner, 1854
27. Species Hypostomus commersoni Valenciennes, 1836
28. Species Hypostomus coppenamensis Boeseman, 1969
29. Species Hypostomus corantijni Boeseman, 1968
30. Species Hypostomus cordovae (Günther, 1880)
31. Species Hypostomus crassicauda Boeseman, 1968
32. Species Hypostomus crulsi Soares, Aquino, Bagley, Langeani & Colli, 2021
33. Species Hypostomus dardanelos Zawadzki & Carvalho, 2014
34. Species Hypostomus delimai Zawadzki, de Oliveira & Debona, 2013
35. Species Hypostomus denticulatus Zawadzki, Weber & Pavanelli, 2008
36. Species Hypostomus derbyi (Haseman, 1911)
37. Species Hypostomus dlouhyi Weber, 1985
38. Species Hypostomus eptingi (Fowler, 1941)
39. Species Hypostomus ericae Hollanda Carvalho & Weber, 2005
40. Species Hypostomus ericius Armbruster, 2003
41. Species Hypostomus faveolus Zawadzki, Birindelli & Lima, 2008
42. Species Hypostomus fluviatilis (Schubart, 1964)
43. Species Hypostomus fonchii Weber & Montoya-Burgos, 2002
44. Species Hypostomus formosae Cardoso, Brancolini, Paracampo, Lizzaralde, Covain & Montoya-Burgos, 2016
45. Species Hypostomus francisci (Lütken, 1874)
46. Species Hypostomus freirei Penido, Pessali & Zawadzki, 2021
47. Species Hypostomus froehlichi Zawadzki, Nardi & Tencatt, 2021
48. Species Hypostomus garmani (Regan, 1904)
49. Species Hypostomus goyazensis (Regan, 1908)
50. Species Hypostomus guajupia Penido, Pessali & Zawadzki, 2021
51. Species Hypostomus gymnorhynchus (Norman, 1926)
52. Species Hypostomus hemicochliodon Armbruster, 2003
53. Species Hypostomus hemiurus (Eigenmann, 1912)
54. Species Hypostomus heraldoi Zawadzki, Weber & Pavanelli, 2008
55. Species Hypostomus hermanni (Ihering, 1905)
56. Species Hypostomus holostictus (Regan, 1913)
57. Species Hypostomus hondae (Regan, 1912)
58. Species Hypostomus hoplonites Rapp Py-Daniel, 1988
59. Species Hypostomus iheringii (Regan, 1908)
60. Species Hypostomus interruptus (Miranda Ribeiro, 1918)
61. Species Hypostomus isbrueckeri Reis, Weber & Malabarba, 1990
62. Species Hypostomus itacua Valenciennes, 1836
63. Species Hypostomus jaguar Zanata, Sardeiro & Zawadzki, 2013
64. Species Hypostomus jaguribensis (Fowler, 1915)
65. Species Hypostomus johnii (Steindachner, 1877)
66. Species Hypostomus khimaera Tencatt, Zawadzki & Froehlich, 2014
67. Species Hypostomus kopeyaka Carvalho, Lima & Zawadzki, 2010
68. Species Hypostomus krishnamurtii Zawadzki, Penido & Lucinda, 2020
69. Species Hypostomus kuarup Zawadzki, Birindelli & Lima, 2012
70. Species Hypostomus labyrinthus Oliveira, Ribeiro, Canto & Zawadzki, 2020
71. Species Hypostomus laplatae (Eigenmann, 1907)
72. Species Hypostomus latifrons Weber, 1986
73. Species Hypostomus latirostris (Regan, 1904)
74. Species Hypostomus leucophaeus Zanata & Pitanga, 2016
75. Species Hypostomus levis (Pearson, 1924)
76. Species Hypostomus lexi (Ihering, 1911)
77. Species Hypostomus lima (Lütken, 1874)
78. Species Hypostomus longiradiatus (Holly, 1929)
79. Species Hypostomus luetkeni (Steindachner, 1877)
80. Species Hypostomus luteomaculatus (Devincenzi, 1942)
81. Species Hypostomus luteus (Godoy, 1980)
82. Species Hypostomus macrophthalmus Boeseman, 1968
83. Species Hypostomus macrops (Eigenmann & Eigenmann, 1888)
84. Species Hypostomus macushi Armbruster & de Souza, 2005
85. Species Hypostomus margaritifer (Regan, 1908)
86. Species Hypostomus melanephelis Zawadzki, Oliveira, Oliveira & Py-Daniel, 2015
87. Species Hypostomus meleagris (Marini, Nichols & La Monte, 1933)
88. Species Hypostomus micromaculatus Boeseman, 1968
89. Species Hypostomus microstomus Weber, 1987
90. Species Hypostomus multidens Jerep, Shibatta & Zawadzki, 2007
91. Species Hypostomus mutucae Knaack, 1999
92. Species Hypostomus myersi (Gosline, 1947)
93. Species Hypostomus nematopterus Isbrücker & Nijssen, 1984
94. Species Hypostomus niceforoi (Fowler, 1943)
95. Species Hypostomus nickeriensis Boeseman, 1969
96. Species Hypostomus niger (Marini, Nichols & La Monte, 1933)
97. Species Hypostomus nigrolineatus Zawadzki, Carvalho, Birindelli & Azevedo, 2016
98. Species Hypostomus nigromaculatus (Schubart, 1964)
99. Species Hypostomus nigropunctatus Garavello, Britski & Zawadzki, 2012
100. Species Hypostomus nudiventris (Fowler, 1941)
101. Species Hypostomus obtusirostris (Steindachner, 1907)
102. Species Hypostomus occidentalis Boeseman, 1968
103. Species Hypostomus oculeus (Fowler, 1943)
104. Species Hypostomus pagei Armbruster, 2003
105. Species Hypostomus pantherinus Kner, 1854
106. Species Hypostomus papariae (Fowler, 1941)
107. Species Hypostomus paranensis Weyenbergh, 1877
108. Species Hypostomus pastinhai Zawadzki & Penido, 2021
109. Species Hypostomus paucimaculatus Boeseman, 1968
110. Species Hypostomus paucipunctatus Hollanda Carvalho & Weber, 2005
111. Species Hypostomus paulinus (Ihering, 1905)
112. Species Hypostomus peckoltoides Zawadzki, Weber & Pavanelli, 2010
113. Species Hypostomus perdido Zawadzki, Tencatt & Froehlich, 2014
114. Species Hypostomus piratatu Weber, 1986
115. Species Hypostomus plecostomoides (Eigenmann, 1922)
116. Species Hypostomus plecostomus (Linnaeus, 1758)
117. Species Hypostomus pospisili (Schultz, 1944)
118. Species Hypostomus pseudohemiurus Boeseman, 1968
119. Species Hypostomus punctatus Valenciennes, 1840
120. Species Hypostomus pusarum (Starks, 1913)
121. Species Hypostomus pyrineusi (Miranda Ribeiro, 1920)
122. Species Hypostomus regani (Ihering, 1905)
123. Species Hypostomus renestoi Zawadzki, da Silva & Troy, 2018
124. Species Hypostomus rhantos Armbruster, Tansey & Lujan, 2007
125. Species Hypostomus robertsoni Dias & Zawadzki, 2021
126. Species Hypostomus robinii Valenciennes, 1840
127. Species Hypostomus rondoni (Miranda Ribeiro, 1912)
128. Species Hypostomus roseopunctatus Reis, Weber & Malabarba, 1990
129. Species Hypostomus saramaccensis Boeseman, 1968
130. Species Hypostomus scabriceps (Eigenmann & Eigenmann, 1888)
131. Species Hypostomus scaphyceps (Nichols, 1919)
132. Species Hypostomus sculpodon Armbruster, 2003
133. Species Hypostomus seminudus (Eigenmann & Eigenmann, 1888)
134. Species Hypostomus sertanejo Zawadzki, Ramos & Sabaj Pérez, 2017
135. Species Hypostomus simios Hollanda Carvalho & Weber, 2005
136. Species Hypostomus sipaliwinii Boeseman, 1968
137. Species Hypostomus soniae Hollanda Carvalho & Weber, 2005
138. Species Hypostomus spiniger (Hensel, 1870)
139. Species Hypostomus strigaticeps (Regan, 1908)
140. Species Hypostomus subcarinatus Castelnau, 1855
141. Species Hypostomus surinamensis Boeseman, 1968
142. Species Hypostomus tapanahoniensis Boeseman, 1969
143. Species Hypostomus taphorni (Lilyestrom, 1984)
144. Species Hypostomus tapijara Oyakawa, Akama & Zanata, 2005
145. Species Hypostomus ternetzi (Boulenger, 1895)
146. Species Hypostomus tietensis (Ihering, 1905)
147. Species Hypostomus topavae (Godoy, 1969)
148. Species Hypostomus unae (Steindachner, 1878)
149. Species Hypostomus uruguayensis Reis, Weber & Malabarba, 1990
150. Species Hypostomus vaillanti (Steindachner, 1877)
151. Species Hypostomus variipictus (Ihering, 1911)
152. Species Hypostomus varimaculosus (Fowler, 1945)
153. Species Hypostomus variostictus (Miranda Ribeiro, 1912)
154. Species Hypostomus velhochico Zawadzki, Oyakawa & Britski, 2017
155. Species Hypostomus ventromaculatus Boeseman, 1968
156. Species Hypostomus vermicularis (Eigenmann & Eigenmann, 1888)
157. Species Hypostomus waiampi Hollanda Carvalho & Weber, 2005
158. Species Hypostomus watwata Hancock, 1828
159. Species Hypostomus weberi Carvalho, Lima & Zawadzki, 2010
160. Species Hypostomus wilsoni (Eigenmann, 1918)
161. Species Hypostomus winzi (Fowler, 1945)
162. Species Hypostomus wuchereri (Günther, 1864)
163. Species Hypostomus yaku Martins, Langeani & Zawadzki, 2014
164. Species Hypostomus aburrensis Posada, 1909 accepted as Chaetostoma aburrensis (Posada, 1909)
165. Species Hypostomus annae (Steindachner, 1881) accepted as Squaliforma annae (Steindachner, 1881)
166. Species Hypostomus aurantiacus Castelnau, 1855 accepted as Parancistrus aurantiacus (Castelnau, 1855)
167. Species Hypostomus barbatus Valenciennes, 1840 accepted as Pseudancistrus barbatus (Valenciennes, 1840) (synonym)
168. Species Hypostomus biseriatus (Cope, 1872) accepted as Squaliforma biseriata (Cope, 1872)
169. Species Hypostomus brevitentaculatus Ranzani, 1841 accepted as Pterygoplichthys etentaculatus (Spix & Agassiz, 1829) (synonym)
170. Species Hypostomus bufonius Valenciennes, 1840 accepted as Ancistrus bufonius (Valenciennes, 1840)
171. Species Hypostomus butantanis (Ihering, 1911) accepted as Hypostomus margaritifer (Regan, 1908) (junior synonym)
172. Species Hypostomus calamita Valenciennes, 1840 accepted as Ancistrus bufonius (Valenciennes, 1840) (junior synonym)
173. Species Hypostomus chapare (Fowler, 1940) accepted as Aphanotorulus unicolor (Steindachner, 1908) (junior synonym)
174. Species Hypostomus cirrhosus Valenciennes, 1836 accepted as Ancistrus cirrhosus (Valenciennes, 1836)
175. Species Hypostomus comersoni Valenciennes, 1836 accepted as Hypostomus commersoni Valenciennes, 1836 (unaccepted > misspelling - incorrect subsequent spelling)
176. Species Hypostomus commersonii Valenciennes, 1836 accepted as Hypostomus commersoni Valenciennes, 1836 (unaccepted > misspelling - incorrect subsequent spelling)
177. Species Hypostomus commersonoides (Marini, Nichols & La Monte, 1933) accepted as Hypostomus laplatae (Eigenmann, 1907) (junior synonym)
178. Species Hypostomus duodecimalis Valenciennes, 1840 accepted as Pterygoplichthys etentaculatus (Spix & Agassiz, 1829) (synonym)
179. Species Hypostomus emarginatus Valenciennes, 1840 accepted as Squaliforma emarginata (Valenciennes, 1840)
180. Species Hypostomus erinaceus Valenciennes, 1840 accepted as Ancistrus erinaceus (Valenciennes, 1840)
181. Species Hypostomus gomesi (Fowler, 1942) accepted as Squaliforma gomesi (Fowler, 1942)
182. Species Hypostomus granosus Valenciennes, 1840 accepted as Neoplecostomus granosus (Valenciennes, 1840)
183. Species Hypostomus guacari Lacepède, 1803 accepted as Hypostomus plecostomus (Linnaeus, 1758) (synonym)
184. Species Hypostomus guacharote Valenciennes, 1840 accepted as Lasiancistrus guacharote (Valenciennes, 1840)
185. Species Hypostomus guttatus Valenciennes, 1840 accepted as Pseudancistrus barbatus (Valenciennes, 1840) (synonym)
186. Species Hypostomus horridus Kner, 1854 accepted as Squaliforma horrida (Kner, 1854)
187. Species Hypostomus karstenii Lütken, 1874 accepted as Ancistrus gymnorhynchus Kner, 1854 (ambiguous synonym)
188. Species Hypostomus lacerta (Nichols, 1919) accepted as Kronichthys lacerta (Nichols, 1919)
189. Species Hypostomus limosus (Eigenmann & Eigenmann, 1888) accepted as Hypostomus spiniger (Hensel, 1870)
190. Species Hypostomus madeirae (Fowler, 1913) accepted as Aphanotorulus unicolor (Steindachner, 1908)
191. Species Hypostomus micropunctatus (La Monte, 1935) accepted as Aphanotorulus unicolor (Steindachner, 1908) (junior synonym)
192. Species Hypostomus multiradiatus Hancock, 1828 accepted as Pterygoplichthys multiradiatus (Hancock, 1828)
193. Species Hypostomus nigricans Castelnau, 1855 accepted as Parancistrus aurantiacus (Castelnau, 1855)
194. Species Hypostomus niveatus Castelnau, 1855 accepted as Baryancistrus niveatus (Castelnau, 1855) (synonym)
195. Species Hypostomus nudiceps Müller & Troschel, 1849 accepted as Ancistrus nudiceps (Müller & Troschel, 1849)
196. Species Hypostomus panamensis (Eigenmann, 1922) accepted as Hemiancistrus aspidolepis (Günther, 1867) (junior synonym)
197. Species Hypostomus pardalis Castelnau, 1855 accepted as Pterygoplichthys pardalis (Castelnau, 1855)
198. Species Hypostomus phrixosoma (Fowler, 1940) accepted as Squaliforma phrixosoma (Fowler, 1940) (senior synonym)
199. Species Hypostomus pictus Castelnau, 1855 accepted as Lasiancistrus schomburgkii (Günther, 1864) (ambiguous synonym)
200. Species Hypostomus popoi (Pearson, 1924) accepted as Aphanotorulus unicolor (Steindachner, 1908) (junior synonym)
201. Species Hypostomus rachovii (Regan, 1913) accepted as Hypostomus laplatae (Eigenmann, 1907)
202. Species Hypostomus robini Valenciennes, 1840 accepted as Hypostomus robinii Valenciennes, 1840 (unaccepted > misspelling - incorrect subsequent spelling)
203. Species Hypostomus scopularius (Cope, 1871) accepted as Squaliforma scopularia (Cope, 1871)
204. Species Hypostomus serratus Valenciennes, 1840 accepted as Pseudacanthicus serratus (Valenciennes, 1840)
205. Species Hypostomus sipaliwini Boeseman, 1968 accepted as Hypostomus sipaliwinii Boeseman, 1968 (unaccepted > misspelling - incorrect subsequent spelling)
206. Species Hypostomus spinosus Castelnau, 1855 accepted as Pseudacanthicus spinosus (Castelnau, 1855)
207. Species Hypostomus squalinus Jardine, 1841 accepted as Squaliforma squalina (Jardine, 1841) (senior synonym)
208. Species Hypostomus taeniatus (Regan, 1908) accepted as Hypostomus laplatae (Eigenmann, 1907) (junior synonym)
209. Species Hypostomus temminckii Valenciennes, 1840 accepted as Ancistrus temminckii (Valenciennes, 1840)
210. Species Hypostomus tenuicauda (Steindachner, 1878) accepted as Squaliforma tenuicauda (Steindachner, 1878)
211. Species Hypostomus tenuis Boeseman, 1968 accepted as Squaliforma tenuis (Boeseman, 1968)
212. Species Hypostomus unicolor (Steindachner, 1908) accepted as Aphanotorulus unicolor (Steindachner, 1908) (senior synonym)
213. Species Hypostomus verres Valenciennes, 1840 accepted as Hypostomus watwata Hancock, 1828 (junior synonym)
214. Species Hypostomus vicinus Castelnau, 1855 accepted as Parancistrus aurantiacus (Castelnau, 1855)
215. Species Hypostomus villarsi (Lütken, 1874) accepted as Squaliforma villarsi (Lütken, 1874)
216. Species Hypostomus virescens (Cope, 1874) accepted as Squaliforma virescens (Cope, 1874)

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