1. Species Diceras angulatum Bayle, 1873 †
2. Species Diceras arietinum Lamarck, 1805 †
3. Species Diceras balaklavense Pchelintsev, 1959 †
4. Species Diceras bourgeati de Loriol, 1888 †
5. Species Diceras brevicornum Karczewski, 1969 †
6. Species Diceras buvignieri Bayle, 1873 †
7. Species Diceras escheri de Loriol, 1867 †
8. Species Diceras impressum Karczewski, 1969 †
9. Species Diceras incrassatum Etallon, 1862 †
10. Species Diceras kastropolense Pchelintsev, 1959 †
11. Species Diceras kozlowskii (Karczewski, 1969) †
12. Species Diceras longum (Karczewski, 1969) †
13. Species Diceras magnum (Karczewski, 1969) †
14. Species Diceras marginatum Bayle, 1873 †
15. Species Diceras minimum Buvignier, 1852 †
16. Species Diceras originale Bayle, 1873 †
17. Species Diceras pcelincevi (Karczewski, 1969) †
18. Species Diceras polonicum (Karczewski, 1969) †
19. Species Diceras portlandicum Etallon, 1862 †
20. Species Diceras praearietinum Pchelintsev, 1959 †
21. Species Diceras spirale (Karczewski, 1969) †
22. Species Diceras strangulatum Bayle, 1873 †
23. Species Diceras subarietinum Pchelintsev, 1959 †
24. Species Diceras subbourgeati Pchelintsev, 1959 †
25. Species Diceras suprajurense Thurmann, 1853 †
26. Species Diceras arietina Lamarck, 1805 † accepted as Diceras arietinum Lamarck, 1805 † (unaccepted > incorrect grammatical agreement of specific epithet)
27. Species Diceras bavaricum G. Boehm, 1881 † accepted as Epidiceras bavaricum (G. Boehm, 1881) † (unaccepted > superseded combination)
28. Species Diceras germani F.-J. Pictet & Campiche, 1868 † accepted as Valletia germani (F.-J. Pictet & Campiche, 1868) †
29. Species Diceras incrassata Etallon, 1862 † accepted as Diceras incrassatum Etallon, 1862 † (unaccepted > incorrect grammatical agreement of specific epithet)
30. Species Diceras inostrancevi Pchelintsev, 1924 † accepted as Epidiceras inostrancevi (Pchelintsev, 1924) †
31. Species Diceras lonsdalii J. De C. Sowerby, 1836 † accepted as Caprotina lonsdalii (J. De C. Sowerby, 1842) † (unaccepted > superseded combination)
32. Species Diceras lucii Defrance, 1819 † accepted as Heterodiceras lucii (Defrance, 1819) † (unaccepted > superseded combination)
33. Species Diceras minima Buvignier, 1852 † accepted as Diceras minimum Buvignier, 1852 † (unaccepted > incorrect grammatical agreement of specific epithet)
34. Species Diceras pironai G. Boehm, 1885 † accepted as Apricardia pironai (G. Boehm, 1885) †
35. Species Diceras sinistrum Deshayes, 1824 † accepted as Epidiceras sinistrum (Deshayes, 1824) †
36. Species Diceras ursicinum Thurmann, 1853 † accepted as Epidiceras ursicinum (Thurmann, 1853) † (unaccepted > superseded combination)
37. Species Diceras valfinense G. Boehm, 1881 † accepted as Plesiodiceras muensteri (Goldfuss, 1837) † (unaccepted > superseded combination)
38. Species Diceras verenae Étallon, 1863 † accepted as Diceras sanctaeverenae Thurmann, 1853 † (unaccepted > unjustified emendation)
39. Species Diceras acutum G. Boehm, 1883 † (uncertain > unassessed)
40. Species Diceras affine Gemmellaro, 1875 † (uncertain > unassessed)
41. Species Diceras beyrichi G. Boehm, 1883 † (uncertain > unassessed)
42. Species Diceras carinatum Gemmellaro, 1875 † (uncertain > unassessed)
43. Species Diceras cotteaui Bayle, 1873 † (uncertain > unassessed)
44. Species Diceras eximium Bayle, 1873 † (uncertain > unassessed)
45. Species Diceras favri Sharpe, 1850 † (uncertain > unassessed)
46. Species Diceras gracile Dubbers, 1888 † accepted as Plesiodiceras gracile (Dubbers, 1888) † (uncertain > nomen dubium)
47. Species Diceras guirandi de Loriol, 1888 † (uncertain > unassessed)
48. Species Diceras inequirostratus S. Woodward, 1833 † (uncertain > unassessed)
49. Species Diceras koeneni Dubbers, 1888 † (uncertain > nomen dubium)
50. Species Diceras lorioli F.-J. Pictet & Campiche, 1868 † accepted as Valletia lorioli (F.-J. Pictet & Campiche, 1868) † (uncertain > nomen dubium)
51. Species Diceras moreaui Bayle, 1873 † (uncertain > unassessed)
52. Species Diceras noetlingi Blanckenhorn, 1890 † (uncertain > unassessed)
53. Species Diceras oosteri Gemmellaro, 1875 † (uncertain > unassessed)
54. Species Diceras podolicum Alth, 1882 † (uncertain > unassessed)
55. Species Diceras sanctaeverenae Thurmann, 1853 † (uncertain > unassessed)
56. Species Diceras sinuatum Gemmellaro, 1875 † (uncertain > unassessed)
57. Species Diceras strambergensis Blaschke, 1911 † (uncertain > unassessed)

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