1. Subfamily Caecinae J. E. Gray, 1850
   1. Genus Caecum J. Fleming, 1813
   2. Genus Mauroceras Vannozzi, 2019
   3. Genus Meioceras P. P. Carpenter, 1859
   4. Genus Pizzinia Vannozzi, 2017
2. Subfamily Ctiloceratinae Iredale & Laseron, 1957
   1. Genus Ctiloceras R. B. Watson, 1886
   2. Genus Enigmerces Iredale & Laseron, 1957
   3. Genus Jayella Iredale & Laseron, 1957
   4. Genus Parastrophia de Folin, 1869
   5. Genus Ponderoceras Bandel, 1996
3. Subfamily Strebloceratinae Bandel, 1996
   1. Genus Strebloceras P. P. Carpenter, 1859
4. Genus Brochina Gray, 1857 accepted as Caecum (Brochina) J. E. Gray, 1857 represented as Caecum J. Fleming, 1813
5. Genus Caecalium J. Fleming, 1822 accepted as Caecum J. Fleming, 1813 (unaccepted > unjustified emendation, Unjustified emendation of Caecum)
6. Genus Carinocera Iredale & Laseron, 1957 accepted as Ctiloceras (Carinocera) Iredale & Laseron, 1957 represented as Ctiloceras R. B. Watson, 1886
7. Genus Coecum [sic] accepted as Caecum J. Fleming, 1813 (unaccepted > misspelling - incorrect subsequent spelling)
8. Genus Cornuoides T. Brown, 1827 accepted as Caecum J. Fleming, 1813
9. Genus Elephantanellum Bartsch, 1920 accepted as Caecum J. Fleming, 1813
10. Genus Elephantellum [sic] accepted as Elephantanellum Bartsch, 1920 accepted as Caecum J. Fleming, 1813 (misspelling of original name)
11. Genus Elephantulum P. P. Carpenter, 1857 accepted as Caecum (Elephantulum) P. P. Carpenter, 1857 represented as Caecum J. Fleming, 1813
12. Genus Fartulum P. P. Carpenter, 1857 accepted as Caecum (Fartulum) P. P. Carpenter, 1857 represented as Caecum J. Fleming, 1813 (unaccepted > superseded rank)
13. Genus Gladioceras Iredale & Laseron, 1957 accepted as Parastrophia (Watsonia) de Folin, 1880 represented as Parastrophia de Folin, 1869
14. Genus Micranellum Bartsch, 1920 accepted as Caecum J. Fleming, 1813 (unaccepted > junior subjective synonym)
15. Genus Mioceras Cossmann, 1912 accepted as Meioceras P. P. Carpenter, 1859 (unaccepted > unjustified emendation, of Meioceras Carpenter, 1859)
16. Subfamily Pedumicrinae Iredale & Laseron, 1957 accepted as Ctiloceratinae Iredale & Laseron, 1957
17. Genus Pictocaecum T. Habe, 1978 accepted as Caecum J. Fleming, 1813
18. Genus Pseudoparastrophia Di Staso, 1905 accepted as Parastrophia de Folin, 1869
19. Genus Spirolidium O. G. Costa, 1861 accepted as Parastrophia de Folin, 1869 (doubtful synonym)
20. Genus Torresella Iredale & Laseron, 1957 accepted as Ctiloceras (Torresella) Iredale & Laseron, 1957 represented as Ctiloceras R. B. Watson, 1886
21. Genus Transcopia Iredale & Laseron, 1957 accepted as Ctiloceras (Transcopia) Iredale & Laseron, 1957 represented as Ctiloceras R. B. Watson, 1886
22. Genus Watsonia de Folin, 1880 accepted as Parastrophia (Watsonia) de Folin, 1880 represented as Parastrophia de Folin, 1869

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