1. Species Costoanachis albicostata K. Monsecour & D. Monsecour, 2016
2. Species Costoanachis alcazari Ortea & Espinosa, 2017
3. Species Costoanachis aurea Lussi, 2017
4. Species Costoanachis avara (Say, 1822)
5. Species Costoanachis beckeri (G. B. Sowerby III, 1900)
6. Species Costoanachis calidoscopio Espinosa, Ortea & Diez, 2017
7. Species Costoanachis carioca K. Monsecour & D. Monsecour, 2024
8. Species Costoanachis carmelita Espinosa, Ortea & Fernández-Garcés, 2007
9. Species Costoanachis cascabulloi Espinosa & Ortea, 2004
10. Species Costoanachis castoi Ortea & Espinoza, 2018
11. Species Costoanachis catenata (G. B. Sowerby I, 1844)
12. Species Costoanachis chinensis (MacNeil, 1961) †
13. Species Costoanachis delahozi Ortea & Espinoza, 2018
14. Species Costoanachis fenneli (Radwin, 1968)
15. Species Costoanachis floridana (Rehder, 1939)
16. Species Costoanachis geovanysi Espinosa & Ortea, 2014
17. Species Costoanachis guembeli (R. Hoernes & Auinger, 1880) †
18. Species Costoanachis haitensis (G. B. Sowerby I, 1850) †
19. Species Costoanachis harzhauseri Landau, Van Dingenen & Ceulemans, 2023 †
20. Species Costoanachis hotessieriana (A. d'Orbigny, 1853)
21. Species Costoanachis idjowensis (Oostingh, 1940) †
22. Species Costoanachis indistincta (Thiele, 1925)
23. Species Costoanachis jeffreysbayensis Lussi, 2017
24. Species Costoanachis kirostra (Duclos, 1840)
25. Species Costoanachis koolhoveni (Oostingh, 1940) †
26. Species Costoanachis latecostata (O. Boettger, 1902) †
27. Species Costoanachis lauensis (Ladd, 1977) †
28. Species Costoanachis leroyi (MacNeil, 1961) †
29. Species Costoanachis magnicostata Sacco, 1890 †
30. Species Costoanachis parva Sacco, 1890 †
31. Species Costoanachis peyrehoradensis Lozouet, 2015 †
32. Species Costoanachis praeterebralis Lozouet, 2015 †
33. Species Costoanachis problematica (Laws, 1944) †
34. Species Costoanachis procorrugata Sacco, 1890 †
35. Species Costoanachis rewaensis (Ladd, 1977) †
36. Species Costoanachis rudyi Espinosa & Ortea, 2006
37. Species Costoanachis saccostata Radwin, 1977 †
38. Species Costoanachis scutulata (Reeve, 1859)
39. Species Costoanachis semicostata Sacco, 1890 †
40. Species Costoanachis semiplicata (Stearns, 1873)
41. Species Costoanachis semiplicata Sacco, 1890 †
42. Species Costoanachis sertulariarum (A. d'Orbigny, 1839)
43. Species Costoanachis similis (Ravenel, 1861)
44. Species Costoanachis sparsa (Reeve, 1859)
45. Species Costoanachis stimpsoni (Bartsch, 1915)
46. Species Costoanachis teophania (Duclos, 1848)
47. Species Costoanachis terebralis (Grateloup, 1834) †
48. Species Costoanachis translirata (Ravenel, 1861)
49. Species Costoanachis turbinellus Sacco, 1890 †
50. Species Costoanachis venzoi Harzhauser & Landau, 2021 †
51. Species Costoanachis winradi (Ladd, 1977) †
52. Species Costoanachis bacalladoi Espinosa, Ortea & Moro, 2008 accepted as Anachis bacalladoi (Espinosa, Ortea & Moro, 2008) (original combination)
53. Species Costoanachis dentilabia Lussi, 2009 accepted as Retizafra dentilabia (Lussi, 2009) (original combination)
54. Species Costoanachis electona (Duclos, 1840) accepted as Anachis electona (Duclos, 1840)
55. Species Costoanachis fluctuata (G. B. Sowerby I, 1832) accepted as Anachis fluctuata (G. B. Sowerby I, 1832)
56. Species Costoanachis lafresnayi (P. Fischer & Bernardi, 1857) accepted as Cotonopsis lafresnayi (P. Fischer & Bernardi, 1857) (unaccepted > superseded combination)
57. Species Costoanachis obesa (C. B. Adams, 1845) accepted as Parvanachis obesa (C. B. Adams, 1845)
58. Species Costoanachis rassierensis Smythe, 1985 accepted as Anachis rassierensis (Smythe, 1985) (original combination)
59. Species Costoanachis rugosa (G. B. Sowerby I, 1832) accepted as Anachis rugosa (G. B. Sowerby I, 1832)
60. Species Costoanachis valae Lussi, 2009 accepted as Retizafra valae (Lussi, 2009) (original combination)
61. Species Costoanachis varia (G. B. Sowerby I, 1832) accepted as Anachis varia (G. B. Sowerby I, 1832)

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