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