1. Species Tanais adelaidensis Tait, Conlan & Dittmann, 2021
2. Species Tanais dulongii (Audouin, 1826)
3. Species Tanais gayi Nicolet, 1849
4. Species Tanais grimaldii Dollfus, 1897
5. Species Tanais loricatus Bate, 1865
6. Species Tanais macrocheles Nicolet, 1849
7. Species Tanais nuwalianensis Tzeng & Hsueh, 2014
8. Species Tanais pongo Bamber, 2005
9. Species Tanais tinhauae Bamber & Bird, 1997
10. Species Tanais vanis Miller, 1940
11. Subgenus Tanais (Anatanais) Nordenstam, 1930 accepted as Anatanais Nordenstam, 1930 (elevated in rank)
    1. Species Tanais (Anatanais) lineatus Nordenstam, 1930 accepted as Anatanais lineatus Nordenstam, 1930 (synonym)
    2. Species Tanais (Anatanais) marmoratus Nordenstam, 1930 accepted as Anatanais marmoratus Nordenstam, 1930 accepted as Zeuxo marmoratus (Nordenstam, 1930) (elevated in rank)
12. Subgenus Tanais (Tanais) Nordenstam, 1930 accepted as Tanais Latreille, 1831 (synonym)
13. Subgenus Tanais (Zeuxo) Sieg, 1978 accepted as Tanais Latreille, 1831 (synonym)
14. Species Tanais abbreviatus Sars, 1868 accepted as Cryptocope abbreviata (Sars, 1868) (synonym)
15. Species Tanais abyssorum Nierstrasz, 1913 accepted as Synaptotanais abyssorum (Nierstrasz, 1913) (synonym)
16. Species Tanais aequiremis Lilljeborg, 1864 accepted as Typhlotanais aequiremis (Lilljeborg, 1864) (synonym)
17. Species Tanais alascensis Richardson, 1899 accepted as Arctotanais alascensis (Richardson, 1899) (synonym)
18. Species Tanais algiricus (unaccepted > nomen nudum)
19. Species Tanais annectens Barnard, 1914 accepted as Singularitanais annectens (Barnard, 1914) (synonym)
20. Species Tanais brasiliensis Dana, 1849 accepted as Leptochelia brasiliensis (Dana, 1849) (synonym)
21. Species Tanais brevicornis Lilljeborg, 1864 accepted as Typhlotanais brevicornis (Lilljeborg, 1864) (synonym)
22. Species Tanais brevimanus Lilljeborg, 1864 accepted as Leptognathia brevimana (Lilljeborg, 1864) accepted as Araphura brevimanus (Lilljeborg, 1864) (synonym)
23. Species Tanais breviremis Lilljeborg, 1864 accepted as Leptognathia breviremis (Lilljeborg, 1864)
24. Species Tanais cavolinii Milne Edwards, 1840 accepted as Tanais dulongii (Audouin, 1826) (synonym)
25. Species Tanais cavolinii Sars, 1882 not Milne Edwards, 1840 accepted as Tanais grimaldii Dollfus, 1897 (synonym)
26. Species Tanais cavolinii Shiino, 1951 not Milne-Edwards, 1840 accepted as Tanais tinhauae Bamber & Bird, 1997 (synonym)
27. Species Tanais chevreuxi Dollfus, 1898 accepted as Parasinelobus chevreuxi (Dollfus, 1898) (Synonym)
28. Species Tanais chevreuxi Monod, 1925 not Dollfus, 1898 accepted as Tanais grimaldii Dollfus, 1897 (synonym)
29. Species Tanais depressus Sars, 1868 accepted as Tanais aequiremis Lilljeborg, 1864 accepted as Typhlotanais aequiremis (Lilljeborg, 1864) (synonym)
30. Species Tanais dubius Krøyer, 1842 accepted as Leptochelia dubia (Krøyer, 1842) accepted as Chondrochelia dubia (Krøyer, 1842) (synonym)
31. Species Tanais Edwardsii Krøyer, 1842 accepted as Leptochelia edwardsii (Krøyer, 1842) accepted as Leptochelia savignyi (Krøyer, 1842) accepted as Chondrochelia savignyi (Kroyer, 1842) (basionym)
32. Species Tanais elongatus Dana, 1849 accepted as Paratanais elongatus (Dana, 1849) (synonym)
33. Species Tanais estuarius Pillai, 1954 accepted as Tanais stanfordi Richardson, 1901 accepted as Sinelobus stanfordi (Richardson, 1901) (synonym)
34. Species Tanais filiformis Lilljeborg, 1864 accepted as Leptognathia filiformis (Lilljeborg, 1864) accepted as Araphura filiformis (Lilljeborg, 1864) (synonym)
35. Species Tanais filum Stimpson, 1853 accepted as Leptochelia filum (Stimpson, 1853) accepted as Pseudoleptochelia filum (Stimpson, 1853) accepted as Pseudonototanais filum (Stimpson, 1853) (synonym)
36. Species Tanais fluviatilis Giambiagi, 1923 accepted as Tanais stanfordi Richardson, 1901 accepted as Sinelobus stanfordi (Richardson, 1901) (synonym)
37. Species Tanais forcipatus Lilljeborg, 1864 accepted as Paratanais forcipatus (Lilljeborg, 1864) accepted as Pseudotanais forcipatus (Lilljeborg, 1864) (synonym)
38. Species Tanais Gallardoi Giambiagi, 1922 accepted as Tanais dulongii (Audouin, 1826) (synonym)
39. Species Tanais gracilis Krøyer, 1842 accepted as Leptognathia gracilis (Krøyer, 1842) accepted as Akanthophoreus gracilis (Krøyer, 1842) (synonym)
40. Species Tanais gracilis Heller, 1865 not Krøyer, 1842 accepted as Anatanais gracilis (Heller, 1865) accepted as Zeuxoides helleri Sieg, 1980 (synonym)
41. Species Tanais graciloides Lilljeborg, 1864 accepted as Leptognathia graciloides (Lilljeborg, 1864) accepted as Tanaopsis graciloides (Lilljeborg, 1864) (synonym)
42. Species Tanais herminiae Mañé-Garzón, 1943 accepted as Tanais stanfordi Richardson, 1901 accepted as Sinelobus stanfordi (Richardson, 1901) (synonym)
43. Species Tanais hirsutus Beddard, 1886 accepted as Anatanais hirsutus (Beddard, 1886) accepted as Archaeotanais hirsutus (Beddard, 1886) accepted as Allotanais hirsutus (Beddard, 1886) (synonym)
44. Species Tanais hirticaudatus Bate, 1861 (unaccepted > nomen nudum)
45. Species Tanais islandicus Sars, 1877 accepted as Leptognathia longiremis (Lilljeborg, 1864) accepted as Akanthophoreus longiremis (Lilljeborg, 1864) accepted as Parakanthophoreus longiremis (Lilljeborg, 1864) (synonym)
46. Species Tanais kurilensis Shiino, 1964 (unaccepted > nomen nudum, synonym)
47. Species Tanais litoralis Vanhöffen, 1914 accepted as Anatanais litoralis (Vanhöffen, 1914) accepted as Zeuxoides pseudolitoralis Sieg, 1980 (synonym)
48. Species Tanais litoralis Vanhöffen, 1914 accepted as Anatanais litoralis (Vanhöffen, 1914) accepted as Pancoloides litoralis (Vanhöffen, 1914) (synonym)
49. Species Tanais longichelipes Lang, 1973 accepted as Leptochelia longichelipes (Lang, 1973) (synonym)
50. Species Tanais longiremis Lilljeborg, 1864 accepted as Leptognathia longiremis (Lilljeborg, 1864) accepted as Akanthophoreus longiremis (Lilljeborg, 1864) accepted as Parakanthophoreus longiremis (Lilljeborg, 1864) (synonym)
51. Species Tanais neo-zelanica Thomson, 1879 accepted as Zeuxo novaezealandiae (Thomson, 1879) (synonym)
52. Species Tanais nierstraszi Stebbing, 1919 accepted as Anatanais nierstraszi (Stebbing, 1919) accepted as Allotanais hirsutus (Beddard, 1886) (synonym)
53. Species Tanais normani Richardson, 1905 accepted as Anatanais normani (Richardson, 1905) accepted as Zeuxo (Zeuxo) normani (Richardson, 1905) accepted as Zeuxo normani (Richardson, 1905) (synonym)
54. Species Tanais novaezealandiae Thomson, 1879 accepted as Anatanais novae-zealandiae (Thomson, 1879) accepted as Anatanais novaezealandiae (Thomson, 1879) accepted as Zeuxo (Zeuxo) novaezealandiae (Thomson, 1879) accepted as Zeuxo novaezealandiae (Thomson, 1879) (synonym)
55. Species Tanais novae-zealandiae Thomson, 1879 accepted as Tanais novaezealandiae Thomson, 1879 accepted as Anatanais novae-zealandiae (Thomson, 1879) accepted as Anatanais novaezealandiae (Thomson, 1879) accepted as Zeuxo (Zeuxo) novaezealandiae (Thomson, 1879) accepted as Zeuxo novaezealandiae (Thomson, 1879) (hyphen removed)
56. Species Tanais oerstedii Krøyer, 1842 accepted as Heterotanais oerstedi (Krøyer, 1842) accepted as Heterotanais oerstedii (Krøyer, 1842) (synonym)
57. Species Tanais ohlini Stebbing, 1914 accepted as Anatanais ohlini (Stebbing, 1914) accepted as Zeuxoides ohlini (Stebbing, 1914) (synonym)
58. Species Tanais philetaerus Stebbing, 1904 accepted as Tanais stanfordi Richardson, 1901 accepted as Sinelobus stanfordi (Richardson, 1901) (synonym)
59. Species Tanais robustus Moore, 1894 accepted as Anatanais robustus (Moore, 1894) accepted as Hexapleomera robusta (Moore, 1894) (synonym)
60. Species Tanais savignyi Krøyer, 1842 accepted as Leptochelia savignyi (Krøyer, 1842) accepted as Chondrochelia savignyi (Kroyer, 1842) (synonym)
61. Species Tanais seurati Nobili, 1906 accepted as Anatanais seurati (Nobili, 1906) accepted as Zeuxo (Parazeuxo) seurati (Nobili, 1906) accepted as Zeuxo seurati (Nobili, 1906) (synonym)
62. Species Tanais spongicola Barnard, 1914 accepted as Zeuxoides spongicola (Barnard, 1914) (synonym)
63. Species Tanais stanfordi Richardson, 1901 accepted as Sinelobus stanfordi (Richardson, 1901) (synonym)
64. Species Tanais sylviae Mello Leitão, 1941 accepted as Tanais stanfordi Richardson, 1901 accepted as Sinelobus stanfordi (Richardson, 1901) (synonym)
65. Species Tanais tenuicornis (Haswell, 1882) accepted as Zeuxo tenuicornis (Haswell, 1882) (synonym)
66. Species Tanais tenuimanus Lilljeborg, 1864 accepted as Typhlotanais tenuimanus (Lilljeborg, 1864) (synonym)
67. Species Tanais testudinicola Dollfus, 1898 accepted as Tanais robustus Moore, 1894 accepted as Anatanais robustus (Moore, 1894) accepted as Hexapleomera robusta (Moore, 1894) (synonym)
68. Species Tanais tomentosus Krøyer, 1842 accepted as Tanais vittatus (Rathke, 1843) accepted as Tanais cavolinii Milne Edwards, 1840 accepted as Tanais dulongii (Audouin, 1826) (synonym)
69. Species Tanais vittatus (Rathke, 1843) accepted as Tanais cavolinii Milne Edwards, 1840 accepted as Tanais dulongii (Audouin, 1826) (synonym)
70. Species Tanais Vøringi Sars, 1877 accepted as Cryptocope Vøringii (Sars, 1877) accepted as Leptognathia vöringi (Sars, 1877) accepted as Paranarthrurella voeringi (Sars, 1877) (synonym)
71. Species Tanais Willemoësii Studer, 1884 accepted as Pseudotanais willemoesi (Studer, 1884) accepted as Langitanais willemoesi (Studer, 1884) (synonym)

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