1. Subgenus Fibula (Sequania) Cossmann, 1895 † accepted as Sequania Cossmann, 1895 † (unaccepted rank)
   1. Species Fibula (Sequania) carinata Pchelintsev, 1931 † accepted as Sequania carinata (Pchelintsev, 1931) † (basionym)
   2. Species Fibula (Sequania) eichwaldi (Karakasch, 1907) † accepted as Sequania eichwaldi (Karakasch, 1907) † (unaccepted combination)
   3. Species Fibula (Sequania) karakaschi Pchelintsev, 1927 † accepted as Sequania karakaschi (Pchelintsev, 1927) † (basionym)
   4. Species Fibula (Sequania) lata Pchelintsev, 1931 † accepted as Sequania lata (Pchelintsev, 1931) † (basionym)
   5. Species Fibula (Sequania) moreana (Buvignier, 1852) † accepted as Sequania moreana (Buvignier, 1852) † (unaccepted combination)
2. Species Fibula acuta Pchelintsev, 1931 † accepted as Fibulella acuta (Pchelintsev, 1931) † (basionym)
3. Species Fibula ai-todori Pchelintsev, 1924 † accepted as Fibulella aitodori (Pchelintsev, 1924) † (basionym)
4. Species Fibula communis Pchelintsev, 1931 † accepted as Fibulella communis (Pchelintsev, 1931) † (basionym)
5. Species Fibula conoidea Pchelintsev, 1931 † accepted as Fibulella conoidea (Pchelintsev, 1931) † (basionym)
6. Species Fibula grandis Pchelintsev, 1965 † accepted as Fibulella grandis (Pchelintsev, 1965) † (basionym)
7. Species Fibula insignis Pchelintsev, 1931 † accepted as Fibulella insignis (Pchelintsev, 1931) † (basionym)
8. Species Fibula kayabaschensis Pchelintsev, 1931 † accepted as Fibulella kayabaschensis (Pchelintsev, 1931) † (basionym)
9. Species Fibula nudiformis Piette, 1857 † accepted as Ceritella phasianoides (J. Morris & Lycett, 1851) † (unaccepted > junior subjective synonym)
10. Species Fibula oviformis Pchelintzev, 1924 † accepted as Fibulella oviformis (Pchelintsev, 1924) † (basionym)
11. Species Fibula plana Pchelintsev, 1926 † accepted as Fibulella plana (Pchelintsev, 1926) † (basionym)
12. Species Fibula recta Pchelintsev, 1931 † accepted as Fibulella recta (Pchelintsev, 1931) † (basionym)
13. Species Fibula roissyi (d'Archiac, 1843) † accepted as Aphanoptyxis roissyi (d'Archiac, 1843) † (unaccepted > superseded combination)
14. Species Fibula subplana Pchelintsev, 1965 † accepted as Fibulella subplana (Pchelintsev, 1965) † (basionym)
15. Species Fibula taurica Pchelintsev, 1924 † accepted as Fibulella taurica (Pchelintsev, 1924) † (basionym)
16. Species Fibula undulosa (Piette, 1855) † accepted as Fibulella undulosa (Piette, 1855) † (unaccepted > superseded combination)
17. Species Fibula vulgaris Pchelintsev, 1931 † accepted as Fibulella vulgaris (Pchelintsev, 1931) † (basionym)
18. Species Fibula variata Lycett, 1863 † (uncertain > unassessed)

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