1. Species Elphidium aculeatum (d'Orbigny, 1846) †
2. Species Elphidium advena (Cushman, 1922)
3. Species Elphidium alvarezianum (d'Orbigny, 1839)
4. Species Elphidium articulatum (d'Orbigny, 1839)
5. Species Elphidium complanatum (d'Orbigny, 1839)
6. Species Elphidium crispum (Linnaeus, 1758)
7. Species Elphidium depressulum Cushman, 1933
8. Species Elphidium earlandi Cushman, 1936
9. Species Elphidium fichtelianum (d'Orbigny, 1846) †
10. Species Elphidium gerthi van Voorthuysen, 1957
11. Species Elphidium granosum (d'Orbigny, 1846) †
12. Species Elphidium jenseni (Cushman, 1924)
13. Species Elphidium lessonii (d'Orbigny, 1839)
14. Species Elphidium longipontis Shchedrina, 1949
15. Species Elphidium macellum (Fichtel & Moll, 1798)
16. Species Elphidium maioricense Colom, 1942
17. Species Elphidium margaritaceum Cushman, 1930
18. Species Elphidium ponticum Dolgopolskaya & Pauli, 1931
19. Species Elphidium striatopunctatum (Fichtel & Moll, 1798)
20. Species Elphidium iranicum (Yassini & Ghahreman, 1976) (uncertain > taxon inquirendum, Opinion of Hayward et al. (2025))
21. Species Elphidium oceanense (d'Orbigny in Fornasini, 1904) (uncertain > taxon inquirendum, Opinion of Hayward et al. (2025))
22. Species Elphidium semistriatum (d'Orbigny, 1852) † (uncertain > taxon inquirendum, Opinion of Hayward et al. (2025))
23. Species Elphidium subnodosum (Münster, 1838) † (uncertain > taxon inquirendum, Opinion of Hayward et al. (2025))
24. Subgenus Elphidium (Polystomella) Heron-Allen & Earland, 1932 accepted as Polystomella Lamarck, 1822 accepted as Elphidium Montfort, 1808 (Nomen translatum)
    1. Species Elphidium (Polystomella) magellanicum Heron-Allen & Earland, 1932 accepted as Cribroelphidium magellanicum (Heron-Allen & Earland, 1932) accepted as Cryptoelphidiella magelllanica (Heron-Allen & Earland, 1932) (Opinion of Debenay et al. (2001))
25. Species Elphidium advenum (Cushman, 1922) accepted as Elphidium advena (Cushman, 1922) (unaccepted > incorrect grammatical agreement of specific epithet, Advena is a noun in standard Latin dictionaries, advena, -ae (stranger); advena has been used also as an adjective but see ICZN art. 31.2.2. for such a case)
26. Species Elphidium albiumbilicatum (Weiss, 1954) accepted as Cryptoelphidiella paucilocula (Cushman, 1944) (unaccepted > junior subjective synonym)
27. Species Elphidium arcticum (Parker & Jones, 1864) accepted as Elphidiella arctica (Parker & Jones, 1864) (superseded combination)
28. Species Elphidium asklundi Brotzen, 1943 accepted as Cryptoelphidiella asklundi (Brotzen, 1943) (unaccepted > superseded combination)
29. Species Elphidium bartletti Cushman, 1933 accepted as Cryptoelphidiella bartletti (Cushman, 1933) (unaccepted > superseded combination)
30. Species Elphidium clavatum Cushman, 1930 accepted as Cribroelphidium clavatum (Cushman, 1930) (unaccepted > superseded combination)
31. Species Elphidium cuvillieri Lévy, 1966 accepted as Cribroelphidium decipiens (Costa, 1856) (unaccepted > junior subjective synonym)
32. Species Elphidium decipiens (O.G.Costa, 1856) accepted as Cribroelphidium decipiens (Costa, 1856) (unaccepted > superseded combination)
33. Species Elphidium excavatum (Terquem, 1875) accepted as Cribroelphidium excavatum (Terquem, 1875) (unaccepted > superseded combination)
34. Species Elphidium fichtellianum (d'Orbigny, 1846) accepted as Elphidium fichtelianum (d'Orbigny, 1846) † (Original misspelling art. 19 ICZN)
35. Species Elphidium gunteri Cole, 1931 accepted as Cribroelphidium gunteri (Cole, 1931)
36. Species Elphidium incertum (Williamson, 1858) accepted as Toddinella incerta (Williamson, 1858) (unaccepted > superseded combination)
37. Species Elphidium lidoense Cushman, 1936 accepted as Cribroelphidium lidoense (Cushman, 1936) (unaccepted > superseded combination)
38. Species Elphidium limbatum (Chapman, 1907) accepted as Elphidium alvarezianum (d'Orbigny, 1839) (unaccepted > junior subjective synonym, Opinion of Hayward et al (2025))
39. Species Elphidium poeyanum (d'Orbigny, 1839) accepted as Elphidiononion poeyanum (d'Orbigny, 1839) accepted as Cribroelphidium poeyanum (d'Orbigny, 1839) (Opinion of Hofker (1956))
40. Species Elphidium selseyense (Heron-Allen & Earland, 1911) accepted as Cribroelphidium decipiens (Costa, 1856) (unaccepted > junior subjective synonym)
41. Species Elphidium subarcticum Cushman, 1944 accepted as Cribroelphidium subarcticum (Cushman, 1944) accepted as Cryptoelphidiella hallandensis (Brotzen, 1943) (Opinion of Gudina (1969), Fursenko (1979))
42. Species Elphidium translucens Natland, 1938 accepted as Cribroelphidium decipiens (Costa, 1856) (unaccepted > junior subjective synonym)
43. Species Elphidium umbilicatulum (Walker & Jacob, 1798) accepted as Nonion umbilicatulum (Walker & Jacob, 1798) accepted as Haynesina depressula (Walker & Jacob, 1798)
44. Species Elphidium verriculatum (Brady, 1881) accepted as Parrellina verriculata (Brady, 1881)
45. Species Elphidium waddense van Voorthuysen, 1951 accepted as Cribroelphidium waddense (van Voorthuysen, 1951) accepted as Cribroelphidium gunteri (Cole, 1931) (unaccepted > junior subjective synonym, Has the typical coarse perforations and rounded periphery of Cribroelphidium)
46. Species Elphidium williamsoni Haynes, 1973 accepted as Elphidium longipontis Shchedrina, 1949 (unaccepted > junior subjective synonym)

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