1. Subgenus Ditremaria (Discotoma) Wenz, 1938 † accepted as Trochotoma (Placotoma) Ferrari, Damborenea, Manceñido & Griffin, 2015 † accepted as Placotoma Ferrari, Damborenea, Manceñido & Griffin, 2015 † (unaccepted > junior homonym, junior homonym of Discotoma Mulsant, 1850 [Coleoptera]; Placotoma is a replacement name)
   1. Species Ditremaria (Discotoma) chordulata Haber, 1934 † accepted as Placotoma funiculosa (Cossmann, 1885) † (unaccepted > junior subjective synonym)
   2. Species Ditremaria (Discotoma) mastoidea Étallon, 1861 † accepted as Trochotoma mastoidea (Étallon, 1861) † (unaccepted > superseded combination)
   3. Species Ditremaria (Discotoma) schlosseri Haber, 1934 † accepted as Placotoma discoidea (Buvignier, 1852) † (unaccepted > junior subjective synonym)
   4. Species Ditremaria (Discotoma) valfinensis Haber, 1934 † accepted as Trochotoma auris Zittel, 1873 † (unaccepted > junior subjective synonym)
   5. Species Ditremaria (Discotoma) zitteli Haber, 1934 † accepted as Trochotoma auris Zittel, 1873 † (unaccepted > junior subjective synonym)
2. Subgenus Ditremaria (Ditremaria) A. d'Orbigny, 1843 † accepted as Trochotoma J. A. Eudes-Deslongchamps, 1843 † (unaccepted > junior subjective synonym)
   1. Species Ditremaria (Ditremaria) bellampensis Haber, 1934 † accepted as Trochotoma (Trochotoma) meneghinii Gemmellaro, 1879 † represented as Trochotoma meneghinii Gemmellaro, 1879 † (unaccepted > junior subjective synonym, tentative junior subjective synonym)
   2. Species Ditremaria (Ditremaria) cotteauana Haber, 1934 † accepted as Trochotoma (Trochotoma) extensa J. Morris & Lycett, 1851 † represented as Trochotoma extensa J. Morris & Lycett, 1851 † (unaccepted > junior subjective synonym)
   3. Species Ditremaria (Ditremaria) gemmellaroi Haber, 1934 † accepted as Trochotoma gemmellaroi (Haber, 1934) † (unaccepted > superseded combination)
   4. Species Ditremaria (Ditremaria) hamptonensis Haber, 1934 † accepted as Trochotoma (Trochotoma) obtusa J. Morris & Lycett, 1851 † represented as Trochotoma obtusa J. Morris & Lycett, 1851 † (unaccepted > junior subjective synonym)
   5. Species Ditremaria (Ditremaria) siciliana Haber, 1934 † accepted as Trochotoma (Trochotoma) pachyspira E. Eudes-Deslongchamps, 1868 † represented as Trochotoma pachyspira E. Eudes-Deslongchamps, 1868 † (unaccepted > junior subjective synonym)
3. Species Ditremaria amata A. d'Orbigny, 1850 † accepted as Placotoma amata (A. d'Orbigny, 1850) † (unaccepted > superseded combination)
4. Species Ditremaria bicarinata A. d'Orbigny, 1843 † accepted as Trochotoma (Trochotoma) bicarinata (A. d'Orbigny, 1843) † represented as Trochotoma bicarinata (A. d'Orbigny, 1843) † (unaccepted > superseded combination)
5. Species Ditremaria carinata Zittel, 1873 † accepted as Valfinia carinata (Zittel, 1873) † (unaccepted > superseded combination)
6. Species Ditremaria conica Rollier, 1918 † accepted as Trochotoma acuminata J. A. Eudes-Deslongchamps, 1843 † (unaccepted > junior subjective synonym)
7. Species Ditremaria cossmanni Rollier, 1918 † accepted as Placotoma cossmanni (Rollier, 1918) † (unaccepted > superseded combination)
8. Species Ditremaria deffneri Fraas, 1882 † (unaccepted > nomen nudum)
9. Species Ditremaria depressa Gioli, 1889 † accepted as Placotoma depressa (Gioli, 1889) † (unaccepted > superseded combination)
10. Species Ditremaria desoriana Cotteau, 1854 † accepted as Trochotoma desoriana (Cotteau, 1854) † (unaccepted > superseded combination)
11. Species Ditremaria gracilis Zittel, 1873 † accepted as Valfinia gracilis (Zittel, 1873) † (unaccepted > superseded combination)
12. Species Ditremaria gradata Gemmellaro, 1879 † accepted as Trochotoma gradata (Gemmellaro, 1879) † (unaccepted > superseded combination)
13. Species Ditremaria granulifera Zittel, 1873 † accepted as Valfinia granulifera (Zittel, 1873) † (unaccepted > superseded combination)
14. Species Ditremaria hermitei de Loriol, 1887 † accepted as Valfinia hermitei (de Loriol, 1887) † (unaccepted > superseded combination)
15. Species Ditremaria hudlestoni Rollier, 1918 † accepted as Trochotoma (Trochotoma) hudlestoni (Rollier, 1918) † represented as Trochotoma hudlestoni (Rollier, 1918) † (unaccepted > superseded combination)
16. Species Ditremaria infundibulum Étallon, 1862 † accepted as Trochotoma (Trochotoma) infundibulum (Étallon, 1862) † represented as Trochotoma infundibulum (Étallon, 1862) † (unaccepted > superseded combination)
17. Species Ditremaria ingens Rollier, 1918 † accepted as Trochotoma ingens (Rollier, 1918) † (unaccepted > superseded combination)
18. Species Ditremaria mantochensis Étallon, 1864 † accepted as Trochotoma mantochensis (Étallon, 1864) † (unaccepted > superseded combination)
19. Species Ditremaria mastoidea Étallon, 1861 † accepted as Trochotoma mastoidea (Étallon, 1861) † (unaccepted > superseded combination)
20. Species Ditremaria orientalis Kiparisova, 1952 † accepted as Trochotoma (Trochotoma) orientalis (Kiparisova, 1952) † represented as Trochotoma orientalis (Kiparisova, 1952) † (unaccepted > superseded combination)
21. Species Ditremaria oxfordiana Étallon, 1864 † accepted as Valfinia oxfordiana (Étallon, 1864) † (unaccepted > superseded combination)
22. Species Ditremaria portlandica Étallon, 1864 † accepted as Valfinia portlandica (Étallon, 1864) † (unaccepted > superseded combination)
23. Species Ditremaria praecursor Stoppani, 1861 † accepted as Trochotoma praecursor (Stoppani, 1861) † (unaccepted > superseded combination)
24. Species Ditremaria quenstedti Rollier, 1918 † accepted as Trochotoma (Trochotoma) quenstedti (Rollier, 1918) † represented as Trochotoma quenstedti (Rollier, 1918) † (unaccepted > superseded combination)
25. Species Ditremaria ranvilliana Rollier, 1918 † accepted as Trochotoma (Trochotoma) ranvilliana (Rollier, 1918) † represented as Trochotoma ranvilliana (Rollier, 1918) † (unaccepted > superseded combination)
26. Species Ditremaria rathieriana A. d'Orbigny, 1850 † accepted as Trochotoma (Trochotoma) rathieriana (A. d'Orbigny, 1850) † represented as Trochotoma rathieriana (A. d'Orbigny, 1850) † (unaccepted > superseded combination)
27. Species Ditremaria salevensis Favre, 1913 † accepted as Valfinia salevensis (Favre, 1913) † (unaccepted > superseded combination)
28. Species Ditremaria scalaris A. d'Orbigny, 1850 † accepted as Trochotoma (Trochotoma) scalaris (A. d'Orbigny, 1850) † represented as Trochotoma scalaris (A. d'Orbigny, 1850) † (unaccepted > superseded combination)
29. Species Ditremaria secans Dubar, 1948 † accepted as Trochotoma (Trochotoma) secans (Dubar, 1948) † represented as Trochotoma secans (Dubar, 1948) † (unaccepted > superseded combination)
30. Species Ditremaria somertonensis Rollier, 1918 † accepted as Trochotoma (Trochotoma) somertonensis (Rollier, 1918) † represented as Trochotoma somertonensis (Rollier, 1918) † (unaccepted > superseded combination)
31. Species Ditremaria strambergensis Remeš, 1909 † accepted as Valfinia strambergensis (Remeš, 1909) † (unaccepted > superseded combination)
32. Species Ditremaria striata Zittel, 1873 † accepted as Trochotoma striata (Zittel, 1873) † (unaccepted > superseded combination)
33. Species Ditremaria suevica Quenstedt, 1884 † accepted as Placotoma suevica (Quenstedt, 1884) † (unaccepted > superseded combination)
34. Species Ditremaria thurmanni de Loriol, 1890 † accepted as Valfinia thurmanni (de Loriol, 1890) † (unaccepted > superseded combination)
35. Species Ditremaria trochoides Gemmellaro, 1879 † accepted as Trochotoma trochoides (Gemmellaro, 1879) † (unaccepted > superseded combination)

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