1. acanthicum
    [Aspidoceras gr. acanthicum]
  2. achilles
    [Lithacosphinctes achilles (M)]
  3. acris
    [Parkinsonia (Parkinsonia) aff. acris]
  4. acutus
    [Turrilites acutus]
  5. adicra
    [Sonninia (Euhoploceras) adicra (M)]
  6. adicra
    [Sonninia (Euhoploceras) cf. adicra]
  7. aegoceratoides
    [Brancoceras (Eubrancoceras) aegoceratoides]
  8. aenigmaticum
    [Phlycticeras aenigmaticum (M)]
  9. afikpoense
    [Libycoceras afikpoense]
  10. alberti
    [Taramelliceras alberti]
  11. alisiense
    [Acanthopleuroceras alisiense]
  12. allae
    [Funiferites allae allae]
  13. alleoni
    [Bredyia gr. alleoni]
  14. alluaudi
    [Forresteria (Forresteria) alluaudi]
  15. alluaudi
    [Forresteria (Forresteria) alluaudi morphe ampozaloakaense]
  16. alphacordatum
    [Cardioceras alphacordatum]
  17. alpinum
    [Protacrioceras alpinum]
  18. alternotuberculatum
    [Protanisoceras (Protanisoceras) gr. alternotuberculatum]
  19. alticosta
    [Paragarantiana alticosta (m)]
  20. amalthei
    [Arieticeras gr. amalthei]
  21. amapondense
    [Eubostrychoceras (Amapondella) amapondense]
  22. ampambiensis
    [Pseudoschloenbachia (Hourcqiella) ampambiensis (?M)]
  23. anar
    [Taramelliceras anar]
  24. anceps
    [Baculites anceps juv.]
  25. anceps
    [Reineckeia (Reineckeia) anceps anceps (M)]
  26. anceps
    [Reineckeia (Reineckeia) anceps anceps (M)]
  27. anceps
    [Reineckeia (Reineckeia) anceps anceps (m)]
  28. anceps
    [Reineckeia (Reineckeia) anceps elmii (M)]
  29. andinus
    [Pseudoneoptychites "andinus"]
  30. andinus
    [Pseudoneoptychites aff. "andinus"]
  31. andrussowi
    [Retowskiceras andrussowi]
  32. angolaense
    [Pseudocalycoceras angolaense]
  33. anguinus
    ["Orionoides" anguinus]
  34. annulatum
    [Calycoceras (Newboldiceras) annulatum]
  35. annulatum
    [Spiroceras annulatum (m)]
  36. antecedens
    [Perisphinctes (Dichotomosphinctes) antecedens (m)]
  37. apertum
    [Hildoceras apertum (M)]
  38. approximans
    [Nostoceras (Nostoceras) approximans (m)]
  39. aquisgranensiformis
    [Scaphites aquisgranensiformis (m)]
  40. archiacianus
    [Protohoplites (Protohoplites) archiacianus]
  41. argelliezi
    [Costiphylloceras argelliezi]
  42. arisphinctoides
    [Homoeoplanulites arisphinctoides (M)]
  43. arisphinctoides
    [Homoeoplanulites arisphinctoides (M)]
  44. arkelli
    [Homoeoplanulites arkelli (M)]
  45. arkelli
    [Perisphinctes (Otosphinctes) arkelli]
  46. arnaudi
    [Yezoites arnaudi (M)]
  47. arrialoorensis
    [Menuites arrialoorensis (M)]
  48. asflaensis
    [Mammites asflaensis]
  49. asflaensis
    [Mammites asflaensis]
  50. asiaticum
    [Calycoceras (Newboldiceras) asiaticum asiaticum]
  51. asiaticum
    [Calycoceras (Newboldiceras) asiaticum spinosum (M)]
  52. atherstoni
    [Olcostephanus (Olcostephanus) atherstoni (M)]
  53. atherstoni
    [Olcostephanus (Olcostephanus) atherstoni (M)]
  54. athleta
    [Peltoceras athleta (m)]
  55. athleta
    [Peltoceras athleta morphe athleta (M)]
  56. athleta
    [Peltoceras athleta morphe athleta (M)]
  57. athleta
    [Peltoceras athleta morphe baylei (M)]
  58. athleta
    [Peltoceras athleta morphe pseudotorosum (m)]
  59. aumalense
    [Submantelliceras cf. aumalense]
  60. aumalensis
    [Mesoturrilites aumalensis]
  61. aurigerus
    [Procerites (Siemiradzkia) aurigerus (m)]
  62. auritus
    [Callihoplites auritus]
  63. austeni
    [Parapuzosia (Austiniceras) austeni]
  64. austeni
    [Parapuzosia (Austiniceras) cf. austeni]
  65. austriacum
    [Eulophoceras austriacum]
  66. autissiodorensis
    [Aulacostephanus autissiodorensis (M)]