1. Species Ilyarachna acarina Menzies & Barnard, 1959
2. Species Ilyarachna aculeatus Merrin, 2024
3. Species Ilyarachna affinis Barnard, 1920
4. Species Ilyarachna antarctica Vanhöffen, 1914
5. Species Ilyarachna argentina Thistle, 1980
6. Species Ilyarachna armata Thistle, 1980
7. Species Ilyarachna bergendahli Ohlin, 1901
8. Species Ilyarachna bicornis Hansen, 1916
9. Species Ilyarachna brucei Merrin, 2024
10. Species Ilyarachna calva Pasternak, 1982
11. Species Ilyarachna cheropin Merrin, 2016
12. Species Ilyarachna crassiceps Barnard, 1920
13. Species Ilyarachna crozetensis Kensley, 1980
14. Species Ilyarachna distincta Birstein, 1971
15. Species Ilyarachna dubia Hansen, 1916
16. Species Ilyarachna ellae Merrin, 2016
17. Species Ilyarachna flindersensis Merrin, 2016
18. Species Ilyarachna frami Just, 1980
19. Species Ilyarachna franki Merrin, 2024
20. Species Ilyarachna hirticeps G. O. Sars, 1870
21. Species Ilyarachna kermadecensis Wolff, 1962
22. Species Ilyarachna kurilensis Kussakin & Mezhov, 1979
23. Species Ilyarachna kussakini Birstein, 1963
24. Species Ilyarachna longicornis (G. O. Sars, 1864)
25. Species Ilyarachna mclayi Merrin, 2024
26. Species Ilyarachna mediorientalis Chardy, 1974
27. Species Ilyarachna mokari Merrin, 2016
28. Species Ilyarachna nordenstami Wolff, 1962
29. Species Ilyarachna pacifica Merrin, 2024
30. Species Ilyarachna perarmata Birstein, 1971
31. Species Ilyarachna pervica Menzies & George, 1972
32. Species Ilyarachna piipaensis Malyutina & Golovan, 2022
33. Species Ilyarachna plana Thistle, 1980
34. Species Ilyarachna polita Bonnier, 1896
35. Species Ilyarachna profunda Schultz, 1966
36. Species Ilyarachna propinqua Birstein, 1971
37. Species Ilyarachna quorna Merrin, 2016
38. Species Ilyarachna sami Merrin, 2024
39. Species Ilyarachna setosa Kussakin, 1979
40. Species Ilyarachna taranui Merrin, 2024
41. Species Ilyarachna torleivi Svavarsson, 1988
42. Species Ilyarachna triangulata Menzies, 1962
43. Species Ilyarachna una Thistle, 1980
44. Species Ilyarachna vemae Menzies & George, 1972
45. Species Ilyarachna wolffi Kensley, 1978
46. Species Ilyarachna zachsi Gurjanova, 1933
47. Species Ilyarachna abyssorum Richardson, 1911 accepted as Amuletta abyssorum (Richardson, 1911) (basionym)
48. Species Ilyarachna africana Menzies, 1962 accepted as Betamorpha africana (Menzies, 1962) (basionym)
49. Species Ilyarachna arctica (Hansen, 1916) accepted as Echinozone arctica Hansen, 1916 (changed genus)
50. Species Ilyarachna argentinae Menzies, 1962 accepted as Bathybadistes argentinae (Menzies, 1962) (basionym)
51. Species Ilyarachna aspidophora Wolff, 1962 accepted as Hapsidohedra aspidophora (Wolff, 1962) (basionym)
52. Species Ilyarachna carinata Birstein, 1963 accepted as Aspidarachna carinata (Birstein, 1963) (basionym)
53. Species Ilyarachna clypeata G. O. Sars, 1870 accepted as Aspidarachna clypeata (G. O. Sars, 1870) (unaccepted > superseded combination)
54. Species Ilyarachna coronata G. O. Sars, 1870 accepted as Echinozone coronata (G. O. Sars, 1870) (unaccepted > superseded combination)
55. Species Ilyarachna defecta Menzies & George, 1972 accepted as Storthyngura defecta (Menzies & George, 1972) (unaccepted > superseded combination)
56. Species Ilyarachna denticulata G. O. Sars, 1897 accepted as Ilyarachna hirticeps G. O. Sars, 1870 (synonym)
57. Species Ilyarachna derjugini Gurjanova, 1946 accepted as Ilyarachna longicornis (G. O. Sars, 1864) (junior synonym)
58. Species Ilyarachna glabra Birstein, 1971 accepted as Aspidarachna glabra (Birstein, 1971) (unaccepted > superseded combination)
59. Species Ilyarachna gurjanovae Menzies, 1962 accepted as Bathybadistes gurjanovae (Menzies, 1962) (basionym)
60. Species Ilyarachna hirsuta (G. O. Sars, 1864) accepted as Pseudarachna hirsuta (G. O. Sars, 1864) (unaccepted > superseded combination)
61. Species Ilyarachna indentifrons Menzies, 1962 accepted as Betamorpha indentifrons (Menzies, 1962) (basionym)
62. Species Ilyarachna longipes Birstein, 1963 accepted as Bathybadistes longipes (Birstein, 1963) (basionym)
63. Species Ilyarachna multispinosa Menzies, 1962 accepted as Bathybadistes multispinosa (Menzies, 1962) (basionym)
64. Species Ilyarachna nodifronoides Menzies, 1962 accepted as Betamorpha fusiformis (Barnard, 1920) (unaccepted > junior subjective synonym)
65. Species Ilyarachna plunketti Tattersall, 1905 accepted as Ilyarachna longicornis (G. O. Sars, 1864) (unaccepted > junior subjective synonym)
66. Species Ilyarachna quadrispinosa Beddard, 1886 accepted as Notopais quadrispinosa (Beddard, 1886) (unaccepted > superseded combination)
67. Species Ilyarachna scabra Birstein, 1971 accepted as Bathybadistes scabra (Birstein, 1971) (unaccepted > superseded combination)
68. Species Ilyarachna scotia Menzies, 1962 accepted as Betamorpha fusiformis (Barnard, 1920) (unaccepted > junior subjective synonym)
69. Species Ilyarachna sekhari George & Menzies, 1968 accepted as Aspidarachna sekhari (George & Menzies, 1968) (basionym)
70. Species Ilyarachna simplex Menzies, 1962 accepted as Ilyarachna polita Bonnier, 1896 (junior synonym)
71. Species Ilyarachna spicata (Hodgson, 1910) accepted as Notopais spicatus Hodgson, 1910 (changed genus)
72. Species Ilyarachna spinoafricana Menzies, 1962 accepted as Ilyarachna affinis Barnard, 1920 (junior synonym)
73. Species Ilyarachna spinosissima Hansen, 1916 accepted as Bathybadistes spinosissima (Hansen, 1916) (basionym)
74. Species Ilyarachna starokadomskii Gurjanova, 1933 accepted as Ilyarachna zachsi Gurjanova, 1933 (unaccepted > junior subjective synonym)
75. Species Ilyarachna thori Wolff, 1962 accepted as Ilyarachna polita Bonnier, 1896 (junior synonym)
76. Species Ilyarachna tuberculata Birstein, 1971 accepted as Bathybadistes tuberculata (Birstein, 1971) (unaccepted > superseded combination)
77. Species Ilyarachna venusta Birstein, 1971 accepted as Bathybadistes venusta (Birstein, 1971) (unaccepted > superseded combination)

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