1. Species Spondylosium armillatum W.B.Turner, 1893
2. Species Spondylosium clepsydra Beck-Mannagetta, 1927
3. Species Spondylosium compressum (Maskell) H.Croasdale & E.A.Flint, 1994
4. Species Spondylosium depressum Brébisson, 1849
5. Species Spondylosium desmidiiforme (Borge) G.S.West
6. Species Spondylosium ellipticum West & G.S.West, 1902
7. Species Spondylosium fragile W.B.Turner, 1893
8. Species Spondylosium horametrum A.M.Scott & Croasdale, 1983
9. Species Spondylosium incurvatum W.B.Turner, 1893
10. Species Spondylosium javanicum (Gutwinski) Grönblad, 1945
11. Species Spondylosium ligatum
12. Species Spondylosium luetkemuelleri Grondblad, 1938
13. Species Spondylosium luetzelburgianum (Willi Krieger) G.J.P.Ramos & C.W.N.Moura, 2019
14. Species Spondylosium lundellii Borge, 1918
15. Species Spondylosium moniliforme P.Lundell, 1871
16. Species Spondylosium mungulporeanum W.B.Turner, 1893
17. Species Spondylosium ornatum Y.Y.Roll
18. Species Spondylosium ossiculorum G.S.West, 1914
19. Species Spondylosium ovale W.B.Turner, 1893
20. Species Spondylosium panduriforme (Heimerl) Teiling, 1957
21. Species Spondylosium papillatum G.S.West, 1904
22. Species Spondylosium papillosum West & G.S.West, 1895
23. Species Spondylosium planum (Wolle) West & G.S.West, 1912
24. Species Spondylosium pseudomoniliferum Bharati & Gonzalves, 1962
25. Species Spondylosium pulchellum (W.Archer) W.Archer, 1861
26. Species Spondylosium pulchrum (Bailey) W.Archer, 1861
27. Species Spondylosium pygmaeum Cooke, 1880
28. Species Spondylosium rectangulare (Wolle) West & G.S.West
29. Species Spondylosium rectum W.B.Turner, 1893
30. Species Spondylosium reniforme W.B.Turner, 1893
31. Species Spondylosium secedens (de Bary) W.Archer, 1861
32. Species Spondylosium simplex (Kurt Förster & Eckert) G.J.P.Ramos & C.W.N.Moura, 2019
33. Species Spondylosium tetragonum West & G.S.West, 1892
34. Species Spondylosium monile W.B.Turner, 1893 accepted as Spondylosium pygmaeum var. monile (W.B.Turner) West & G.S.West, 1923 (synonym)
35. Species Spondylosium nitens (G.C.Wallich) Lundell, 1871 accepted as Sphaerozosma nitens (Wallich) De Toni, 1889
36. Species Spondylosium stomatomorphum Kützing, 1849 accepted as Sphaerozosma stomatomorphum (Kützing) Rabenhorst, 1868 (synonym)
37. Species Spondylosium harbinense Noda, 1963 (uncertain, uncertain taxonomic status subjected to verification)
38. Species Spondylosium lamelliferum W.B.Turner, 1893 (uncertain, uncertain taxonomic status subjected to verification)

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