1. macrescens
    [Morphoceras macrescens (M)]
  2. macrescens
    [Morphoceras macrescens (M)]
  3. maculatum
    [Aegoceras maculatum]
  4. madagascariensis
    [Pseudaspidoceras madagascariensis]
  5. madagascariensis
    [Pseudaspidoceras madagascariensis]
  6. madagascariensis
    [Pseudaspidoceras madagascariensis]
  7. madagascariensis
    [Pseudaspidoceras madagascariensis]
  8. madagascariensis
    [Pseudaspidoceras madagascariensis]
  9. madagascariensis
    [Pseudaspidoceras madagascariensis]
  10. madagascariensis
    [Pseudaspidoceras madagascariensis]
  11. madagascariensis
    [Pseudaspidoceras madagascariensis]
  12. madagascariensis
    [Pseudaspidoceras madagascariensis juv.]
  13. magniforme
    [Iniskinites magniforme]
  14. majoricensis
    [Crioceratites majoricensis]
  15. malagasyense
    [Nostoceras (Nostoceras) malagasyense]
  16. malagma
    [Denckmannia gr. malagma]
  17. mamertensis
    [Paralcidia mamertensis]
  18. mammillatum
    [Douvilleiceras mammillatum]
  19. mammillatum
    [Douvilleiceras mammillatum juv.]
  20. mammillatum
    [Douvilleiceras mammillatum juv.]
  21. mantelli
    [Lewesiceras mantelli]
  22. mantelli
    [Lewesiceras mantelli juv.]
  23. mantelli
    [Mantelliceras mantelli (M)]
  24. marcianus
    [Eopachydiscus marcianus]
  25. margae
    [Gauthiericeras margae]
  26. margae
    [Gauthiericeras margae]
  27. margae
    [Gauthiericeras margae (M)]
  28. margae
    [Gauthiericeras margae (M)]
  29. margae
    [Gauthiericeras margae (m)]
  30. margae
    [Gauthiericeras margae juv.]
  31. margaritatus
    [Amaltheus margaritatus forme gibbosus]
  32. margaritatus
    [Amaltheus margaritatus forme margaritatus]
  33. marginata
    [Sonninia (Euhoploceras) marginata morphe dominans (M)]
  34. marroti
    [Hoplitoplacenticeras marroti]
  35. martiusii
    [Vermisphinctes martiusii (M)]
  36. martiusii
    [Vermisphinctes martiusii (M)]
  37. marysae
    [Peltoceras marysae (M)]
  38. marysae
    [Peltoceras marysae (M)]
  39. marysae
    [Peltoceras marysae (M)]
  40. mascarellii
    [Heteroceras mascarellii]
  41. matheroni
    [Pseudohaploceras cf. matheroni]
  42. matheroni
    [Pseudohaploceras matheroni]
  43. matheronianum
    [Ancyloceras cf. matheronianum]
  44. matheronianum
    [Ancyloceras matheronianum]
  45. matheyi
    [Prososphinctes matheyi (m)]
  46. maugenesti
    [Acanthopleuroceras aff. maugenesti]
  47. maugenesti
    [Acanthopleuroceras maugenesti]
  48. mauryae
    [Tragodesmoceras mauryae]
  49. maximus
    [Hamites (Hamites) cf. maximus]
  50. mayoriana
    [Puzosia (Puzosia) mayoriana]
  51. mayoriana
    [Puzosia (Puzosia) mayoriana]
  52. medea
    [Kosmoceras medea (M) juv.]
  53. meeki
    [Placenticeras meeki (M)]
  54. meniscum
    [Labyrinthoceras meniscum (M)]
  55. meriani
    [Acrioceras (Acrioceras) meriani]
  56. meseres
    [Prorsisphinctes aff. meseres]
  57. messiaeni
    [Quenstedtoceras messiaeni (M)]
  58. mexicanum
    [Phlycticeras mexicanum (M)]
  59. mexicanum
    [Phlycticeras mexicanum (M)]
  60. michalskii
    [Hecticoceras (Chanasia) aff. michalskii (M)]
  61. michelinianus
    [Protohoplites (Protohoplites) michelinianus]
  62. microstoma
    [Bullatimorphites (Kheraiceras) microstoma (m)]
  63. milletianus
    [Hypacanthoplites milletianus]
  64. mirabilis
    [Hoplitoides cf. mirabilis]
  65. mirabilis
    [Hoplitoides mirabilis]
  66. mirabilis
    [Hourcquia mirabilis]
  67. mite
    [Gaudryceras gr. mite]
  68. mohovanensis
    [Mammites mohovanensis]
  69. mollis
    [Mollistephanus mollis]
  70. monopujaae
    [Rugacrioceras monopujaae (m)]
  71. moorei
    [Dumortieria moorei]
  72. moriezense
    [Heteroceras moriezense]
  73. mouterdei
    [Bajocisphinctes mouterdei (M)]
  74. moutonianum
    [Moutoniceras moutonianum]
  75. mucronatus
    [Mucrodactylites mucronatus (m)]
  76. multicostatum
    [Coroniceras multicostatum]
  77. multiforme
    [Morphoceras multiforme (M)]
  78. mundum
    [Haplopleuroceras mundum]
  79. munieri
    [Wrightoceras munieri]
  80. munieri
    [Wrightoceras munieri]
  81. munieri
    [Wrightoceras munieri]
  82. murleyi
    [Hildaites murleyi]
  83. mutabile
    [Stephanoceras mutabile (M)]
  84. muticum
    [Metaderoceras gr. muticum]