1. Ochetoceras
    [Ochetoceras "hispidum"]
  2. Ochetoceras
    [Ochetoceras canaliculatum]
  3. Ochetoceras
    [Ochetoceras canaliculatum (M)]
  4. Ochetoceras
    [Ochetoceras canaliculatum (m)]
  5. Ochetoceras
    [Ochetoceras pamprouxense]
  6. Ochetoceras
    [Ochetoceras raixense]
  7. Oecoptychius
    [Oecoptychius refractus (m)]
  8. Oecotraustes
    [Oecotraustes umbilicatus]
  9. Oistoceras
    [Oistoceras lincolnense]
  10. Olcostephanus
    [Olcostephanus (Jeannoticeras) jeannoti]
  11. Olcostephanus
    [Olcostephanus (Olcostephanus) atherstoni (M)]
  12. Olcostephanus
    [Olcostephanus (Olcostephanus) atherstoni (M)]
  13. Olcostephanus
    [Olcostephanus (Olcostephanus) sayni (M)]
  14. Olcostephanus
    [Olcostephanus (Olcostephanus) sayni (M)]
  15. Olcostephanus
    [Olcostephanus (Olcostephanus) sp.]
  16. Onychoceras
    [Onychoceras differens]
  17. Oosterella
    [Oosterella cultrata]
  18. Oppelia
    [Oppelia subcostata]
  19. Oppelia
    [Oppelia subradiata]
  20. Oraniceras
    [Oraniceras gyrumbilicum (M)]
  21. Oraniceras
    [Oraniceras gyrumbilicum (M)]
  22. Oraniceras
    [Oraniceras wuerttembergicum (m)]
  23. Orbignyiceras
    [Orbignyiceras pseudopunctatum (M)]
  24. Orbignyiceras
    [Orbignyiceras trezeense (M)]
  25. Orionoides
    ["Orionoides" anguinus]
  26. Orionoides
    [Orionoides indicus (M)]
  27. Orionoides
    [Orionoides indicus (M)]
  28. Orionoides
    [Orionoides indicus (M) juv.]
  29. Orthaspidoceras
    [Orthaspidoceras lallierianum]
  30. Orthaspidoceras
    [Orthaspidoceras lallierianum]
  31. Orthaspidoceras
    [Orthaspidoceras lallierianum]
  32. Orthaspidoceras
    [Orthaspidoceras lallierianum juv.]
  33. Orthogarantiana
    [Orthogarantiana densicostata (M)]
  34. Orthogarantiana
    [Orthogarantiana haugi (M)]
  35. Osperleioceras
    [Osperleioceras bicarinatum]
  36. Ostlingoceras
    [Ostlingoceras (Ostlingoceras) aff. colcanapi]
  37. Ostlingoceras
    [Ostlingoceras (Ostlingoceras) puzosianum]
  38. Otohoplites
    [Otohoplites raulinianus]
  39. Otohoplites
    [Otohoplites raulinianus]
  40. Otohoplites
    [Otohoplites subhilli]
  41. Otoites
    [Otoites contractus (m)]
  42. Oxycerites
    [Oxycerites limosus (M)]
  43. Oxycerites
    [Oxycerites limosus (M)]
  44. Oxycerites
    [Oxycerites orbis (M)]
  45. Oxycerites
    [Oxycerites seebachi (M)]
  46. Oxycerites
    [Oxycerites sp.]
  47. Oxytropidoceras
    [Oxytropidoceras (Mirapelia) sp.]
  48. Oxytropidoceras
    [Oxytropidoceras (Venezoliceras) karsteni]