1. Subgenus Obeliscus (Longchaeus) Mörch, 1875 accepted as Longchaeus Mörch, 1875 (original rank)
2. Subgenus Obeliscus (Pyramidella) Lamarck, 1799 accepted as Pyramidella Lamarck, 1799
   1. Species Obeliscus (Pyramidella) hyalinus Dunker, 1860 accepted as Tiberia hyalina (Dunker, 1860) (unaccepted > superseded combination)
3. Subgenus Obeliscus (Syrnola) A. Adams, 1860 accepted as Syrnola A. Adams, 1860
   1. Species Obeliscus (Syrnola) gracillima E. A. Smith, 1872 accepted as Eulimella variabilis de Folin, 1870 (junior synonym)
   2. Species Obeliscus (Syrnola) pumilio E. A. Smith, 1890 accepted as Syrnola pumilio (E. A. Smith, 1890) (basionym)
4. Subgenus Obeliscus (Triptychus) Mörch, 1875 accepted as Triptychus Mörch, 1875 (original rank)
   1. Species Obeliscus (Triptychus) niveus Mörch, 1875 accepted as Triptychus niveus (Mörch, 1875)
5. Species Obeliscus aciculatus A. Adams, 1854 accepted as Cossmannica aciculata (A. Adams, 1854) (original combination)
6. Species Obeliscus aclis A. Adams, 1854 accepted as Syrnola aclis (A. Adams, 1854) (original combination)
7. Species Obeliscus acutus A. Adams, 1853 (unaccepted > nomen nudum)
8. Species Obeliscus adamsii P. P. Carpenter, 1864 accepted as Longchaeus adamsii (P. P. Carpenter, 1864)
9. Species Obeliscus annulatus A. Adams, 1854 accepted as Oscilla annulata (A. Adams, 1854) (unaccepted > superseded combination)
10. Species Obeliscus balteatus A. Adams, 1854 accepted as Tiberia balteata (A. Adams, 1854) (original combination)
11. Species Obeliscus brunneus A. Adams, 1854 accepted as Colsyrnola brunnea (A. Adams, 1854) (original combination)
12. Species Obeliscus buxeus A. Gould, 1861 accepted as Colsyrnola brunnea (A. Adams, 1854)
13. Species Obeliscus canaliculata Gabb, 1873 † accepted as Pyramidella canaliculata (Gabb, 1873) † (unaccepted > superseded combination)
14. Species Obeliscus canaliculattus [sic] † accepted as Pyramidella canaliculata (Gabb, 1873) † (Misspelling of original species name, Obeliscus canaliculatus Gabb, 1873.)
15. Species Obeliscus clavulus A. Adams, 1854 accepted as Pyramidella (Pharcidella) moffati Dall & Bartsch, 1906 accepted as Pyramidella moffati Dall & Bartsch, 1906 (unaccepted > junior homonym, junior primary homonym of Obeliscus clavulus Beck, 1838; Pyramidella (Pharcidella) moffati Dall & Bartsch, 1906 is a replacement name)
16. Species Obeliscus crenulatus Holmes, 1859 accepted as Longchaeus suturalis (H. C. Lea, 1846)
17. Species Obeliscus dolobratus (Linnaeus, 1758) accepted as Pyramidella dolabrata (Linnaeus, 1758) (unaccepted > misspelling, of dolabratus, and superseded combination)
18. Species Obeliscus dominicensis (L. Pfeiffer, 1853) accepted as Pseudobalea dominicensis (L. Pfeiffer, 1853) (unaccepted combination)
19. Species Obeliscus eburneus A. Adams, 1863 accepted as Tiberia pusilla (A. Adams, 1854)
20. Species Obeliscus elegans A. Adams, 1854 accepted as Syrnola elegans (A. Adams, 1854) (original combination)
21. Species Obeliscus fastigium A. Adams, 1854 accepted as Pyramidella fastigium (A. Adams, 1854) (original combination)
22. Species Obeliscus floridanus Mörch, 1875 accepted as Longchaeus suturalis (H. C. Lea, 1846)
23. Species Obeliscus gracillima E. A. Smith, 1872 accepted as Eulimella variabilis de Folin, 1870 (junior synonym)
24. Species Obeliscus hastatus A. Adams, 1854 accepted as Pyramidella hastata (A. Adams, 1854) (unaccepted > superseded combination)
25. Species Obeliscus hyalinus Garrett, 1873 accepted as Pyramidella paumotensis Tryon, 1886 accepted as Vagna paumotensis (Tryon, 1886) (invalid: junior homonym of Obeliscus hyalinus Dunker, 1860; Pyramidella paumotensis is a replacement name)
26. Species Obeliscus hyalinus Dunker, 1860 accepted as Tiberia hyalina (Dunker, 1860) (unaccepted > superseded combination, original combination)
27. Species Obeliscus menadensis Schepman, 1907 † accepted as Longchaeus menadensis (Schepman, 1907) † (original combination)
28. Species Obeliscus nitidulus (A. Adams, 1860) accepted as Tiberia nitidula (A. Adams, 1860) (unaccepted > superseded combination)
29. Species Obeliscus obtusatus O. Semper, 1861 † accepted as Longchaeus obtusatus (O. Semper, 1861) † (original combination)
30. Species Obeliscus ornatus A. Gould, 1861 accepted as Colsyrnola ornata (A. Gould, 1861) (original combination)
31. Species Obeliscus pulchellus A. Adams, 1854 accepted as Tiberia pulchella (A. Adams, 1854) (unaccepted > superseded combination)
32. Species Obeliscus pusillus A. Adams, 1854 accepted as Tiberia pusilla (A. Adams, 1854) (original combination)
33. Species Obeliscus roseus F. W. Hutton, 1873 accepted as Zemitrella rosea (F. W. Hutton, 1873) (superseded combination)
34. Species Obeliscus sanctaehelenae E. A. Smith, 1890 accepted as Pyramidella sanctaehelenae (E. A. Smith, 1890) (original combination)
35. Species Obeliscus scitulus A. Adams, 1854 accepted as Milda ventricosa (Guérin, 1831) (unaccepted > junior subjective synonym)
36. Species Obeliscus solidulus Dunker, 1860 accepted as Pyramidella solidula (Dunker, 1860) (original combination)
37. Species Obeliscus spiculum A. Adams, 1853 (unaccepted > nomen nudum)
38. Species Obeliscus striatulus A. Adams, 1854 accepted as Syrnola striatula (A. Adams, 1854) (unaccepted > superseded combination)
39. Species Obeliscus sulcatus A. Adams, 1854 accepted as Pyramidella sulcata (A. Adams, 1854) accepted as Longchaeus maculosus (Lamarck, 1822)
40. Species Obeliscus suturalis Maltzan, 1885 accepted as Longchaeus inopinatus (Schander, 1994) (secondary junior homonym of Pyramidella suturalis H.C. Lea, 1843; Pyramidella schanderi is a replacement name)
41. Species Obeliscus tasmanicus Petterd, 1884 accepted as Agatha petterdi (Gatliff, 1900) (secondary homonym, see under Agatha peterdi)
42. Species Obeliscus tenuisculptus Lischke, 1872 accepted as Iphiana tenuisculpta (Lischke, 1872)
43. Species Obeliscus terebelloides A. Adams, 1854 accepted as Pyramidella terebelloides (A. Adams, 1854) (unaccepted > superseded combination)
44. Species Obeliscus teres A. Adams, 1854 accepted as Longchaeus turritus (A. Adams, 1854) (unaccepted > superseded combination)
45. Species Obeliscus tessellatus A. Adams, 1854 accepted as Longchaeus maculosus (Lamarck, 1822)
46. Species Obeliscus trifasciatus A. Adams, 1863 accepted as Tiberia trifasciata (A. Adams, 1863) (unaccepted > superseded combination)
47. Species Obeliscus turritus A. Adams, 1854 accepted as Longchaeus turritus (A. Adams, 1854) (unaccepted > superseded combination)
48. Species Obeliscus vitreus (A. Adams, 1860) accepted as Syrnola vitrea A. Adams, 1860 (unaccepted > superseded combination)
49. Species Obeliscus attenuatus A. Adams, 1854 (uncertain > taxon inquirendum)
50. Species Obeliscus monilis A. Adams, 1854 (uncertain > unassessed, use in recent literature not established by editor)
51. Species Obeliscus perforatus A. Adams, 1854 (uncertain > unassessed, use in recent literature not established by editor)
52. Species Obeliscus stylinus A. Adams, 1854 (uncertain > unassessed, use in recent literature not established by editor)
53. Species Obeliscus variegatus P. P. Carpenter, 1864 (uncertain > unassessed)

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