1. Genus Bogoslovskya Zhuravleva, 1978 †
2. Genus Infundibuloceras Klug, Kröger, Korn, Rücklin, Schemm-Gregory, De Baets & Mapes, 2008 †
3. Genus Kopaninoceras Kiselev, 1969 †
4. Genus Leurocycloceras Foerste, 1928 †
5. Genus Malayorthoceras Niko, Sone & Leman, 2019 †
6. Genus Mericoceras Zhuravleva, 1978 †
7. Genus Mesnaquaceras Flower, 1955 †
8. Genus Michelinoceras Foerste, 1932 †
9. Genus Mimogeisonoceras Shimansky, 1968 †
10. Genus Orthoceras Bruguière, 1789 †
11. Genus Orthocycloceras Barskov, 1972 †
12. Genus Palorthoceras Kröger, Beresi & Landing, 2007 †
13. Genus Pleurorthoceras Flower, 1962 †
14. Genus Pojetoceras R. C. Frey, 1995 †
15. Genus Pseudospyroceras Kröger, 2008 †
16. Genus Rizosceras Hyatt, 1883 †
17. Genus Sorosoceras D. H. Evans, M. Ghobadi Pour, L. E. Popov & H. Jahangir 2021 †
18. Genus Striatocycloceras Kröger & Isakar, 2006 †
19. Genus Subtheoceras Pohle & Klug, 2018 †
20. Genus Tenuitheoceras L. Frey, Naglik, R. Hofmann, Schemm-Gregory, Frýda, Kröger, P. D. Taylor, M. A. Wilson & Klug, 2014 †
21. Genus Theoceras Kröger, 2008 †
22. Genus Tibichoanoceras Kröger, 2008 †
23. Genus Wardoceras S. C. Hook & Flower, 1977 †
24. Genus Wennanoceras J.-Y. Chen, 1976 †
25. Genus Loxoceras F. M'Coy, 1844 † (uncertain > unassessed)
26. Genus Protobactrites Hyatt, 1900 † (uncertain > unassessed)
27. Subfamily Kionoceratinae Hyatt, 1900 † accepted as Kionoceratidae Hyatt, 1900 † (unaccepted > superseded rank)
28. Subfamily Michelinoceratinae Flower, 1945 † accepted as Orthoceratidae F. McCoy, 1844 † (unaccepted > superseded rank)
29. Genus Orthocera Brugiere, 1798 † accepted as Orthoceras Bruguière, 1789 † (unaccepted > unjustified emendation)
30. Subfamily Orthoceratinae F. McCoy, 1844 † accepted as Orthoceratidae F. McCoy, 1844 † (unaccepted > superseded rank)
31. Genus Orthoceratites Gesner, 1758 † accepted as Orthoceras Bruguière, 1789 † (unaccepted > unavailable name, published in a work placed on the Official Index by Opinion 230)

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