1. Subgenus Distoma (Dicrocoelium) Dujardin, 1845
   1. Species Distoma (Dicrocoelium) furcigerum Olsson, 1868 accepted as Steringophorus furciger (Olsson, 1868) Odhner, 1905 (unaccepted > superseded combination)
2. Species Distoma andersoni Cobbold, 1876
3. Species Distoma beroes Will, 1844
4. Species Distoma carinariae Della Chiaje, 1841
5. Species Distoma rhizophysae Studer, 1878
6. Species Distoma aeglefini (Müller, 1776) Zeder, 1803 accepted as Podocotyle aeglefini (Müller, 1776) Yamaguti, 1954 accepted as Podocotyle simplex (Rudolphi, 1809) Srivastava, 1966 (Superseded combination)
7. Species Distoma affine Rudolphi, 1819 accepted as Derogenes affinis (Rudolphi, 1819) Lühe, 1901 (Superseded combination)
8. Species Distoma amphiorchis Braun, 1899 accepted as Orchidasma amphiorchis (Braun, 1899) Looss, 1900 (Superseded combination)
9. Species Distoma ampullaceum Buttel-Reepen, 1900 accepted as Hirudinella ampullacea (Buttel-Reepen, 1900) Skrjabin & Guschanskaja, 1957 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (unaccepted > superseded combination)
10. Species Distoma anarrhichaelupi Rathke, 1799 accepted as Fellodistomum anarrichaelupi (Rathke, 1799) Dollfus, 1968 (Superseded combination)
11. Species Distoma anthos Braun, 1899 accepted as Calycodes anthos (Braun, 1899) Looss, 1901 (Superseded combination)
12. Species Distoma appendiculatum (Rudolphi, 1802) Rudolphi, 1808 accepted as Apoblema appendiculatum (Rudolphi, 1802) Dujardin, 1845 accepted as Hemiurus appendiculatus (Rudolphi, 1802) Looss, 1899 (unaccepted > superseded combination)
13. Species Distoma atomon (Rudolphi, 1802) Rudolphi, 1819 accepted as Allocreadium atomon (Rudolphi, 1802) Odhner, 1901 accepted as Podocotyle atomon (Rudolphi, 1802) Odhner, 1905 (unaccepted > superseded combination)
14. Species Distoma baccigerum Rudolphi, 1819 accepted as Bacciger bacciger (Rudolphi, 1819) Nicoll, 1914 (unaccepted > superseded combination)
15. Species Distoma bagriincapsulatum Wedl, 1961 accepted as Nephrocephalus bagriincapsulatus (Wedl, 1861) Yamaguti, 1958 (Superseded combination)
16. Species Distoma bergense Olsson, 1868 accepted as Lecithaster gibbosus (Rudolphi, 1802) Lühe, 1901 (unaccepted > junior subjective synonym)
17. Species Distoma botryophoron Olsson, 1868 accepted as Lecithophyllum botryophoron (Olsson, 1868) Odhner, 1905 (unaccepted > superseded combination)
18. Species Distoma brachysomum Creplin, 1837 accepted as Levinsenia brachysoma (Creplin, 1837) Stossich, 1899 accepted as Levinseniella brachysoma (Creplin, 1837) Stiles & Hassall, 1902 (Superseded combination)
19. Species Distoma bursicola Creplin, 1837 accepted as Uroproctepisthmium bursicola (Creplin, 1937) Kostadinova & Gibson, 2001 (Superseded combination)
20. Species Distoma campula Cobbold, 1876 accepted as Cyclorchis campula (Cobbold, 1876) Lühe, 1908 (unaccepted > superseded combination)
21. Species Distoma capitellatum Rudolphi, 1819 accepted as Anisocoelium capitellatum (Rudolphi, 1819) Lühe, 1900 (Superseded combination)
22. Species Distoma carnosum Rudolphi, 1919 accepted as Pachycreadium carnosum (Rudolphi, 1819) Cortini & Ferretti, 1959 (unaccepted > superseded combination)
23. Species Distoma caudiporum Rudolphi, 1819 accepted as Lecithochirium caudiporum (Rudolphi, 1819) Lühe, 1901 accepted as Synaptobothrium caudiporum (Rudolphi, 1819) Looss, 1907 (Superseded combination)
24. Species Distoma cesticillus (Molin, 1858) accepted as Echinostomum cesticillus (Molin, 1858) accepted as Stephanochasmus cesticillus (Molin, 1858) Looss, 1900 accepted as Stephanostomum cesticillus (Molin, 1858) Looss, 1899 (Superseded combination)
25. Species Distoma cestoides Van Beneden, 1870 accepted as Otodistomum cestoides (Van Beneden, 1870) Odhner, 1911 (unaccepted > superseded combination)
26. Species Distoma cinctum (Rudolphi, 1803) Rudolphi, 1809 accepted as Echinoparyphium cinctum (Rudolphi, 1803) Baschkirova, 1941 (Superseded combination)
27. Species Distoma clavatum (Menzies, 1791) Rudolphi, 1808 accepted as Hirudinella clavata (Menzies, 1791) de Blainville, 1828 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (unaccepted > superseded combination)
28. Species Distoma commune Olsson, 1868 accepted as Peracreadium commune (Olsson, 1868) Nicoll, 1909 (unaccepted > superseded combination)
29. Species Distoma concavum Creplin, 1925 accepted as Tocotrema concavum (Creplin, 1825) Looss, 1899 accepted as Cryptocotyle concava (Creplin, 1825) Lühe, 1899 (unaccepted > superseded combination)
30. Species Distoma constrictum Leared, 1862 accepted as Hapalotrema constrictum (Leared, 1862) Looss, 1899 accepted as Hapalotrema mistroides (Monticelli, 1896) Stiles & Hassall, 1908 (superseded combination)
31. Species Distoma contortum Rudolphi, 1819 accepted as Accacoelium contortum (Rudolphi, 1819) Looss, 1899 (Superseded combination)
32. Species Distoma coronatum Wagener, 1852 accepted as Anoiktostoma coronatum (Wagener, 1852) Stossich, 1899 (Superseded combination)
33. Species Distoma crenatum (Rudolphi, 1802) Rudolphi, 1809 accepted as Hemiurus crenatus (Rudolphi, 1802) Lühe, 1901 accepted as Brachyphallus crenatus (Rudolphi, 1802) Odhner, 1905 (Superseded combination)
34. Species Distoma cristatum Rudolphi, 1819 accepted as Lecithocladium cristatum (Rudolphi, 1819) Looss, 1907 (Superseded combination)
35. Species Distoma cucumerinum Rudolphi, 1809 accepted as Typhlocoelum cucumerinum (Rudolphi, 1809) Stossich, 1903 (unaccepted > superseded combination)
36. Species Distoma cymbiforme Rudolphi, 1819 accepted as Spathidium cymbiforme (Rudolphi, 1819) Looss, 1899 accepted as Phyllodistomum cymbiforme (Rudolphi, 1819) Braun, 1899 accepted as Plesiochorus cymbiformis (Rudolphi, 1819) Looss, 1901 (Superseded combination)
37. Species Distoma deliciosum Olsson, 1893 accepted as Gymnophallus deliciosus (Olsson, 1893) Odhner, 1900 (Superseded combination)
38. Species Distoma dendriticum Rudolphi, 1819 accepted as Dicrocoelium dendriticum (Rudolphi, 1819) Looss, 1899. (unaccepted > superseded combination)
39. Species Distoma diesingi Cobbold, 1860 accepted as Distomum cochlear Diesing, 1850 accepted as Galactosomum cochlear (Diesing, 1850) Travassos, 1929 (Synonym)
40. Species Distoma divergens Rudolphi, 1809 accepted as Steringotrema divergens (Rudolphi, 1809) Odhner, 1911 (Superseded combination)
41. Species Distoma erinaceum Poirier, 1886 accepted as Galactosomum erinaceum (Poirier, 1886) Bittner & Sprehn, 1928 (Superseded combination)
42. Species Distoma excisum Rudolphi, 1819 accepted as Lecithocladium excisum (Rudolphi, 1819) Lühe, 1901 (Superseded combination)
43. Species Distoma fallax Rudolphi, 1819 accepted as Anisocladium fallax (Rudolphi, 1819) Looss, 1902 (Superseded combination)
44. Species Distoma fasciatum Rudolphi, 1819 accepted as Helicometra fasciata (Rudolphi, 1819) Odhner, 1902 (unaccepted > superseded combination)
45. Species Distoma fellis Olsson, 1868 accepted as Fellodistomum fellis (Olsson, 1868) Nicoll, 1909 (unaccepted > superseded combination)
46. Species Distoma filicolle (Rudolphi, 1819) van Beneden, 1858 accepted as Koellikeria filicollis (Rudolphi, 1819) Cobbold, 1860 (superseded combination)
47. Species Distoma filiforme Rudolphi, 1819 accepted as Monascus filiformis (Rudolphi, 1819) Looss, 1907 (superseded combination)
48. Species Distoma flavescens van Beneden, 1870 accepted as Monorcheides flavescens (van Beneden, 1870) Markowski, 1935 (superseded combination)
49. Species Distoma fractum Rudolphi, 1819 accepted as Robphildollfusium fractum (Rudolphi, 1819) Paggi & Orecchia, 1963 (Superseded combination)
50. Species Distoma furcatum Bremser in Rudolphi, 1819 accepted as Opecoeloides furcatus (Bremser in Rudolphi, 1819) Odhner, 1928 (unaccepted > superseded combination)
51. Species Distoma furcigerum Olsson, 1868 accepted as Leioderma furcigerum (Olsson, 1868) Stafford, 1904 accepted as Fellodistomum furcigerum (Olsson, 1868) Yamaguti, 1953 accepted as Steringophorus furciger (Olsson, 1868) Odhner, 1905 (unaccepted > superseded combination)
52. Species Distoma fuscescens Rudolphi, 1819 accepted as Aphallus fuscescens (Rudolphi, 1819) Yamaguti, 1971 accepted as Aphallus tubarium (Rudolphi, 1819) Poche, 1926 (Superseded combination)
53. Species Distoma fuscum (Bosc, 1802) Poirier, 1885 accepted as Hirudinella fusca (Bosc, 1802) Manter, 1926 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (unaccepted > superseded combination)
54. Species Distoma gelatinosum Rudolphi, 1819 accepted as Rhytidodes gelatinosus (Rudolphi, 1819) Looss, 1901 (Superseded combination)
55. Species Distoma genu Rudolphi, 1819 accepted as Peracreadium genu (Rudolphi, 1819) Nicoll, 1909 (unaccepted > superseded combination)
56. Species Distoma gibbosum (Rudolphi, 1802) Rudolphi, 1809 accepted as Lecithaster gibbosus (Rudolphi, 1802) Lühe, 1901 (Superseded combination)
57. Species Distoma gigas Nardo, 1827 accepted as Kenmackenzia gigas (Nardo, 1827) Gibson, 1983 (unaccepted > superseded combination)
58. Species Distoma goliath van Beneden, 1858 accepted as Lecithodesmus goliath (van Beneden, 1858) Odhner, 1905 accepted as Brachycladium goliath (van Beneden, 1858) Fraija-Fernández, Aznar, Raga, Gibson & Fernández, 2014 (Superseded combination)
59. Species Distoma gracilescens Rudolphi, 1819 accepted as Prosorhynchoides gracilescens (Rudolphi, 1819) Stunkard, 1976 (Superseded combination)
60. Species Distoma grandiporum Rudolphi, 1819 accepted as Lecithochirium grandiporum (Rudolphi, 1819) Lühe, 1901 (unaccepted > superseded combination)
61. Species Distoma hippopodii Vogt, 1854 accepted as Lepocreadium album (Stossich, 1890) Stossich, 1904 (unaccepted > junior subjective synonym)
62. Species Distoma hispidum Abildgaard in Rudolphi, 1819 accepted as Echinostoma hispidum (Abildgaard in Rudolphi, 1819) Cobbold, 1858 accepted as Deropristis hispida (Abildgaard in Rudolphi, 1819) Odhner, 1902 (Superseded combination)
63. Species Distoma hystrix Dujardin, 1845 accepted as Stephanostomum hystrix (Dujardin, 1845) Looss, 1899 (Superseded combination)
64. Species Distoma inconstans Linton, 1905 accepted as Multitestis inconstans (Linton, 1905) Manter, 1931 (Superseded combination)
65. Species Distoma increscens Olsson, 1868 accepted as Opechona bacillaris (Molin, 1859) Dollfus, 1927 (unaccepted > junior subjective synonym)
66. Species Distoma inflata Molin, 1859 accepted as Deropristis inflata (Molin, 1859) Odhner, 1902 (superseded combination)
67. Species Distoma ingens Moniez, 1886 accepted as Hirudinella ingens (Moniez, 1886) Darr, 1902 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (unaccepted > superseded combination)
68. Species Distoma irroratum Rudolphi, 1819 accepted as Pachypsolus irroratus (Rudolphi, 1819) Looss, 1902 (Superseded combination)
69. Species Distoma kessleri Grebnitzky, 1872 accepted as Halipegus kessleri (Grebnitzky, 1872) Vlasenko, 1929 accepted as Halipegus ovocaudatus (Vulpian, 1859) Looss, 1899 (synonym)
70. Species Distoma labracis Dujardin, 1945 accepted as Cainocreadium labracis (Dujardin, 1845) Nicoll, 1909 (Superseded combination)
71. Species Distoma laeve Linton, 1898 accepted as Hemiurus laevis (Linton, 1898) Looss, 1899 accepted as Sterrhurus laevis (Linton, 1898) Manter, 1934 accepted as Lecithochirium laeve (Linton, 1898) Crowcroft, 1946 accepted as Dissosaccus laevis (Linton, 1898) Manter, 1947 (Superseded combination)
72. Species Distoma laticolle Rudolphi, 1819 accepted as Tergestia laticollis (Rudolphi, 1819) Stossich, 1899 (superseded combination)
73. Species Distoma lingua Creplin, 1825 accepted as Cryptocotyle lingua (Creplin, 1825) Fischoeder, 1903 (Superseded combination)
74. Species Distoma lutea van Beneden, 1870 accepted as Diphterostomum betencourti (Monticelli, 1893) Odhner, 1911 (unaccepted > junior subjective synonym)
75. Species Distoma lymphaticum von Linstow, 1903 accepted as Ptychogonimus megastomum (Rudolphi, 1819) Lühe, 1900 (synonym)
76. Species Distoma margaritarum Dubois, 1901 accepted as Gymnophallus margaritarum (Dubois, 1901) Dubois, 1907 accepted as Gymnophallus minutus (Cobbold, 1859) (Superseded combination)
77. Species Distoma megastomum Rudolphi, 1819 accepted as Ptychogonimus megastomum (Rudolphi, 1819) Lühe, 1900 (Superseded combination)
78. Species Distoma megnini Poirier, 1885 accepted as Accacladocoelium megnini (Poirier, 1885) Dollfus, 1946 accepted as Accacladocoelium nigroflavum (Rudolphi, 1819) Robinson, 1934 (Superseded combination)
79. Species Distoma microcephalum Baird, 1853 accepted as Otodistomum veliporum (Creplin, 1837) Stafford, 1904 (unaccepted > junior subjective synonym)
80. Species Distoma micropharyngeum Lühe, 1898 accepted as Gymnophallus micropharyngeus (Lühe, 1898) Odhner, 1900 (Superseded combination)
81. Species Distoma miescheri Zschokke, 1890 accepted as Lampritrema miescheri (Zschokke, 1890) Margolis, 1962 (unaccepted > superseded combination)
82. Species Distoma militare (Rudolphi, 1803) Rudolphi, 1809 accepted as Echinostoma militare (Rudophi, 1803) Cobbold, 1860 accepted as Himasthla militaris (Rudolphi, 1803) Dietz, 1909 (Superseded combination)
83. Species Distoma minima van Beneden, 1870 (unaccepted > nomen nudum)
84. Species Distoma minutum Cobbold, 1859 accepted as Parvatrema minutum (Cobbold, 1859) accepted as Gymnophallus minutus (Cobbold, 1859) (synonym)
85. Species Distoma motellae van Beneden, 1870 (unaccepted > nomen nudum)
86. Species Distoma muehlingi Jägerskiöld, 1899 accepted as Tocotrema muehlingi (Jägerskiöld, 1899) Looss, 1899 accepted as Apophallus muehlingi (Jägerskiöld, 1899) Lühe, 1909 (Superseded combination)
87. Species Distoma nigrescens Olsson, 1876 accepted as Otodistomum veliporum (Creplin, 1837) Stafford, 1904 (synonym, Otodistomum sp. metacercaria according to Gibson & Bray, 1977)
88. Species Distoma nigroflavum Rudolphi, 1819 accepted as Accacladocoelium nigroflavum (Rudolphi, 1819) Robinson, 1934 (unaccepted > superseded combination)
89. Species Distoma okenii Koelliker, 1847 accepted as Koellikeria okenii (Koelliker, 1847) Ariola, 1906 accepted as Koellikeria filicollis (Rudolphi, 1819) Cobbold, 1860 (unaccepted > superseded combination)
90. Species Distoma pachysoma Eysenhardt, 1829 accepted as Podocotyle pachysomum (Eysenhardt, 1829) Stossich, 1898 accepted as Haplosplanchnus pachysomus (Eysenhardt, 1829) Looss, 1902 accepted as Haplosplanchnus pachysoma (Eysenhardt, 1829) Looss, 1902 (Superseded combination)
91. Species Distoma pagelli van Beneden, 1871 accepted as Steringotrema pagelli (van Beneden, 1871) Odhner, 1911 (superseded combination)
92. Species Distoma pallasii Poirier, 1885 accepted as Hirudinella pallasii (Poirier, 1885) Guiart, 1938 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (unaccepted > superseded combination)
93. Species Distoma palleniscum Shipley & Hornell, 1905 accepted as Hamacreadium palleniscum (Shipley & Hornell, 1905) Yamaguti, 1954 accepted as Neolebouria pallenisca (Shipley & Hornell, 1905) Martin, Cutmore, Ward & Cribb, 2017 accepted as Paramanteriella pallenisca (Shipley & Hornell, 1905) Martin, Cutmore & Cribb, 2017 (unaccepted > superseded combination)
94. Species Distoma pallens Rudolphi, 1819 accepted as Allocreadium pallens (Rudolphi, 1819) Wallin, 1909
95. Species Distoma pelagiae Kölliker, 1845 accepted as Accacoelium pelagiae (Kölliker, 1849) Monticelli, 1893 (Superseded combination)
96. Species Distoma planicolle Rudolphi, 1819 accepted as Anoiktostoma planicolle (Rudolphi, 1819) Braun, 1901 accepted as Opisthometra planicollis (Rudolphi, 1819) Poche, 1926 (unaccepted > superseded combination)
97. Species Distoma platyurum Mühling, 1897 accepted as Psilostomum platyurum (Mühling, 1897) Looss, 1899 (unaccepted > superseded combination)
98. Species Distoma poirieri Stossich, 1895 accepted as Telorchis poirieri (Stossich, 1895) Odhner, 1902 (Superseded combination)
99. Species Distoma poirieri Moniez, 1891 accepted as Hirudinella poirieri (Moniez, 1891) Dollfus, 1935 accepted as Hirudinella ventricosa (Pallas, 1774) Baird, 1853 (unaccepted > superseded combination)
100. Species Distoma pristis Deslongchamps, 1824 accepted as Stephanochasmus pristis (Deslongchamps, 1824) Looss, 1901 accepted as Stephanostomum pristis (Deslongchamps, 1824) Looss, 1899 (Superseded combination)
101. Species Distoma pseudoechinatum Olsson, 1876 accepted as Mesorchis pseudoechinatus (Olsson, 1876) Dietz, 1909 accepted as Stephanoprora pseudoechinata (Olsson, 1876) Yamaguti, 1958 (Superseded combination)
102. Species Distoma pulchellum Rudolphi, 1819 accepted as Helicometra pulchella (Rudolphi, 1819) Odhner, 1902 (unaccepted > superseded combination)
103. Species Distoma rachion Cobbold, 1858 accepted as Lepodora rachiaea (Cobbold, 1858) Odhner, 1905 accepted as Lepidapedon rachion (Cobbold, 1858) Stafford, 1904 (Superseded combination)
104. Species Distoma raynerium Nardo, 1833 accepted as Tetrochetus raynerii (Nardo, 1833) Looss, 1912 (Superseded combination)
105. Species Distoma reflexum Creplin, 1825 accepted as Podocotyle reflexa (Creplin, 1825) Odhner, 1905 (Superseded combination)
106. Species Distoma rhombi van Beneden, 1870 (unaccepted > nomen nudum)
107. Species Distoma richiardii López, 1888 (unaccepted, Superseded combination)
108. Species Distoma rubellum Olsson, 1868 (unaccepted, Superseded combination)
109. Species Distoma rufoviride Rudolphi, 1819 (unaccepted > superseded combination)
110. Species Distoma scorpaenae Rudolphi, 1819 (unaccepted, Superseded combination)
111. Species Distoma scymni Risso, 1826 of authors (unaccepted > superseded combination)
112. Species Distoma siemersii Buttel-Reepen, 1900 (unaccepted > superseded combination)
113. Species Distoma simplex Rudolphi, 1809 (unaccepted, Superseded combination)
114. Species Distoma sinuatum Rudolphi, 1819 (unaccepted > superseded combination)
115. Species Distoma soleae Dujardin, 1845 (unaccepted)
116. Species Distoma soleare Braun, 1899 (unaccepted, Superseded combination)
117. Species Distoma somateriae Levinsen, 1881 (unaccepted, synonym)
118. Species Distoma spinulosum Rudolphi, 1809 (unaccepted > superseded combination)
119. Species Distoma tectum von Linstow, 1873 (unaccepted, synonym)
120. Species Distoma tornatum Rudolphi, 1819 (unaccepted > superseded combination)
121. Species Distoma truncatum (Rduolphi, 1819) (unaccepted > superseded combination)
122. Species Distoma tubarium Rudolphi, 1819 (unaccepted, Superseded combination)
123. Species Distoma tubulatum Rudolphi, 1819 (unaccepted, Superseded combination)
124. Species Distoma tumidulum Rudolphi, 1819 (unaccepted, superseded combination)
125. Species Distoma tursionis Marchi, 1873 (unaccepted, Superseded combination)
126. Species Distoma varicum (Müller, 1784) Zeder, 1803 (unaccepted > superseded combination)
127. Species Distoma varicum (Muller, 1784) Zeder, 1803 (unaccepted > superseded combination)
128. Species Distoma velellae Koelliker, 1849 (unaccepted > junior subjective synonym)
129. Species Distoma veliporum Creplin, 1837 (unaccepted > superseded combination)
130. Species Distoma ventricosum Rudolphi, 1819 (unaccepted > superseded combination)
131. Species Distoma viviparum Olsson, 1868 (unaccepted, Superseded combination)
132. Species Distoma areolatum Rudolphi, 1809 (uncertain > taxon inquirendum)
133. Species Distoma ascidia Rudolphi, 1819 (uncertain > taxon inquirendum)
134. Species Distoma aspidophori van Beneden, 1870 (uncertain > taxon inquirendum)
135. Species Distoma callionymi van Beneden, 1870 (uncertain > taxon inquirendum)
136. Species Distoma cryptobothrium van Beneden, 1870 (uncertain > taxon inquirendum)
137. Species Distoma fenestratum Linton, 1905 (uncertain > taxon inquirendum, larval name)
138. Species Distoma fulvum Rudolphi, 1819 (uncertain > taxon inquirendum)
139. Species Distoma incisum Rudolphi, 1809 (uncertain > taxon inquirendum, Unrecognisable. Not Fellodistomum incisum (Rud., 1809) Stafford, 1904)
140. Species Distoma labri van Beneden, 1870 (uncertain > taxon inquirendum)
141. Species Distoma macrobothrium van Beneden, 1870 (uncertain > taxon inquirendum)
142. Species Distoma macroporum Monticelli, 1893 (uncertain > taxon inquirendum)
143. Species Distoma microphylla van Beneden, 1870 (uncertain > taxon inquirendum)
144. Species Distoma microstomum Rudolphi, 1809 (uncertain > taxon inquirendum)
145. Species Distoma obesa van Beneden, 1870 (uncertain > taxon inquirendum)
146. Species Distoma physophorae Koelliker, 1849 (uncertain > taxon inquirendum)
147. Species Distoma rosea van Beneden, 1870 (uncertain > taxon inquirendum)
148. Species Distoma scabrum (Müller, 1784) Zeder, 1803 (uncertain > taxon inquirendum)
149. Species Distoma scimna Risso, 1826 (uncertain > taxon inquirendum, May be synonym of Otodistomum veliporum)

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