1. Species Palaeoneilo aegyptiaca Ayoub-Hannaa, Fürsich & Abdelhady, 2023 †
2. Species Palaeoneilo angusta J. Hall, 1885 †
3. Species Palaeoneilo antiqua (J. De C. Sowerby, 1840) †
4. Species Palaeoneilo constricta (Conrad, 1842) †
5. Species Palaeoneilo corrugata Pohl, 1929 †
6. Species Palaeoneilo cuneata J.-H. Chen, 1976 †
7. Species Palaeoneilo elliptica (J. Phillips, 1841) †
8. Species Palaeoneilo emarginata (Conrad, 1841) †
9. Species Palaeoneilo faba Wissmann, 1841 †
10. Species Palaeoneilo filosa (Conrad, 1842) †
11. Species Palaeoneilo forbesii Ulrich, 1892 †
12. Species Palaeoneilo fortistriata Wasmer & Hautmann, 2012 †
13. Species Palaeoneilo fuyunensis Z.-R. Yang, 1983 †
14. Species Palaeoneilo galatea (A. d'Orbigny, 1850) †
15. Species Palaeoneilo gushiensis D.-Y. Wang, 1977 †
16. Species Palaeoneilo kalpinensis Z.-R. Yang, 1981 †
17. Species Palaeoneilo kalpintakensis Z.-R. Yang, 1981 †
18. Species Palaeoneilo lirata (J. Phillips, 1841) †
19. Species Palaeoneilo muensteri (Goldfuss, 1841) †
20. Species Palaeoneilo muta J. Hall & Whitfield, 1869 †
21. Species Palaeoneilo onukii (T. Kobayashi & Hisakoshi, 1942) †
22. Species Palaeoneilo ostraviense (Klebelsberg, 1912) †
23. Species Palaeoneilo perplana J. Hall & Whitfield, 1869 †
24. Species Palaeoneilo plicata (J. Phillips, 1841) †
25. Species Palaeoneilo praecursor (Frech, 1904) †
26. Species Palaeoneilo qinggilensis Z.-R. Yang, 1983 †
27. Species Palaeoneilo qinzhouensis W. He, Q. Feng, Weldon, S. Gu, Y. Meng, F. Zhang & S. Wu, 2007 †
28. Species Palaeoneilo qujiangensis R.-J. Zhang, 1977 †
29. Species Palaeoneilo sakuradaniensis Ichikawa, 1954 †
30. Species Palaeoneilo sinuosa (de Ryckholt, 1854) †
31. Species Palaeoneilo smithi Pojeta & Gilbert-Tomlinson, 1977 †
32. Species Palaeoneilo sulcatina (Conrad, 1842) †
33. Species Palaeoneilo tensa (Whidborne, 1896) †
34. Species Palaeoneilo tiaomajianensis R.-J. Zhang, 1977 †
35. Species Palaeoneilo truncata J. Hall, 1883 †
36. Species Palaeoneilo whitechurchii Healey, 1908 †
37. Subgenus Palaeoneilo (Metapalaeoneilo) Lamcke, 1934 † accepted as Metapalaeoneilo Lamcke, 1934 † (unaccepted > superseded rank)
    1. Species Palaeoneilo (Metapalaeoneilo) baltica Lamcke, 1934 † accepted as Metapalaeoneilo baltica (Lamcke, 1934) † (unaccepted > superseded combination)
38. Species Palaeoneilo bisulcata J. Hall & Whitfield, 1869 † accepted as Bicrenula bisulcata (J. Hall & Whitfield, 1869) † (unaccepted > superseded combination)
39. Species Palaeoneilo brevis J. Hall & Whitfield, 1869 † accepted as Palaeoneilo constricta (Conrad, 1842) † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
40. Species Palaeoneilo choroschowensis Borissjak, 1904 † accepted as Mesosaccella choroschowensis (Borissjak, 1904) † (unaccepted > superseded combination)
41. Species Palaeoneilo elliptica (Goldfuss, 1837) † accepted as Palaeoneilo muensteri (Goldfuss, 1841) † (invalid; based on preoccupied original name)
42. Species Palaeoneilo fecunda J. Hall & Whitfield, 1869 † accepted as Palaeoneilo filosa (Conrad, 1842) † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
43. Species Palaeoneilo hamiltoni Wilckens, 1927 † accepted as Mesosaccella hamiltoni (Wilckens, 1927) †
44. Species Palaeoneilo mundeni C. A. Fleming, 1954 † accepted as Mesosaccella mundeni (C. A. Fleming, 1954) †
45. Species Palaeoneilo muricata J. M. Clarke, 1904 † accepted as Bicrenula bisulcata (J. Hall & Whitfield, 1869) † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
46. Species Palaeoneilo otamitensis Trechmann, 1918 † accepted as Mesosaccella otamitensis (Trechmann, 1918) †
47. Species Palaeoneilo petila J. M. Clarke, 1904 † accepted as Palaeoneilo constricta (Conrad, 1842) † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
48. Species Palaeoneilo plana J. Hall & Whitfield, 1869 † accepted as Palaeoneilo constricta (Conrad, 1842) † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
49. Species Palaeoneilo raricostae Chapman, 1908 † accepted as Praectenodonta raricostae (Chapman, 1908) † (unaccepted > superseded combination, original combination)
50. Species Palaeoneilo tenulineata Klipstein, 1845 † accepted as Palaeoneilo faba Wissmann, 1841 †
51. Species Palaeoneilo anthraconeiloides (Chao, 1927) † (uncertain > unassessed)
52. Species Palaeoneilo arata J. Hall, 1885 † (uncertain > taxon inquirendum, probably not a nuculoid species)
53. Species Palaeoneilo attenuata J. Hall & Whitfield, 1869 † (uncertain > unassessed)
54. Species Palaeoneilo brevicula J. M. Clarke, 1904 † (uncertain > taxon inquirendum)
55. Species Palaeoneilo crassa J. M. Clarke & Swartz, 1913 † (uncertain > taxon inquirendum)
56. Species Palaeoneilo elongata J. Hall, 1885 † (uncertain > nomen dubium)
57. Species Palaeoneilo fentouensis L. Liu, 1983 † (uncertain > unassessed)
58. Species Palaeoneilo guizhouensis Chen & X. Lan, 1976 † (uncertain > unassessed)
59. Species Palaeoneilo iruyensis Harrington, 1938 † (uncertain > unassessed)
60. Species Palaeoneilo leiyangensis L. Liu, 1976 † (uncertain > unassessed)
61. Species Palaeoneilo linguata J. M. Clarke, 1904 † (uncertain > taxon inquirendum)
62. Species Palaeoneilo magnifica J. M. Clarke, 1913 † (uncertain > unassessed)
63. Species Palaeoneilo oviformis (Eck, 1872) † (uncertain > unassessed)
64. Species Palaeoneilo praeacuta (Klipstein, 1843) † (uncertain > unassessed)
65. Species Palaeoneilo rhysa J. M. Clarke, 1913 † (uncertain > unassessed)
66. Species Palaeoneilo sancticrucis J. M. Clarke, 1913 † (uncertain > unassessed)
67. Species Palaeoneilo similis Whitfield, 1882 † (uncertain > nomen dubium)
68. Species Palaeoneilo subexcentrica C.-Z. Chen, 1976 † (uncertain > unassessed)
69. Species Palaeoneilo suborbicularis Reed, 1927 † (uncertain > unassessed)
70. Species Palaeoneilo subtenella Krumbeck, 1924 † (uncertain > unassessed)
71. Species Palaeoneilo sunanensis L. Liu, 1976 † (uncertain > unassessed)
72. Species Palaeoneilo tenuistriata J. Hall & Whitfield, 1869 † (uncertain > unassessed)
73. Species Palaeoneilo tianshanensis Z.-R. Yang, 1983 † (uncertain > unassessed)
74. Species Palaeoneilo tirolensis (Woehrmann, 1889) † (uncertain > unassessed)
75. Species Palaeoneilo triangularis Mansuy, 1912 † (uncertain > unassessed)
76. Species Palaeoneilo virginica J. Hall, 1885 † (uncertain > unassessed)
77. Species Palaeoneilo yongdingensis J.-H. Li & B.-L. Ding, 1982 † (uncertain > unassessed)

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