page_title: List of the Mesozoic life of Wyoming
section_title: M
hierarchical_section_title: List of the Mesozoic life of Wyoming / M
caption_attribution_description: English: Crop of file in filename
context_page_description: This list of the Mesozoic life of Wyoming contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Wyoming and are between 252.17 and 66 million years of age.
context_section_description: †Macelognathus – type locality for genus
  †Macelognathus vagans – type locality for species
  Mactra
  †Mactra emmonsi
  †Mactromya – tentative report
  †Magadiceramus
  †Magadiceramus soukupi
  †Magadiceramus subquadratus
  †Magnoliophyllum
  †Magnoliophyllum cordatum
  †Malapoenna
  †Malapoenna weediana – tentative report
  Malletia
  †Malletia stephensoni
  †Manihotites
  †Manihotites georgiana
  †Matonidium
  †Matonidium Althaausii
  †Matonidium Althausii
  †Mecochirus
   †Megalneusaurus
  †Megalneusaurus rex – type locality for species
  †Megasphaeroceras
  †Megasphaeroceras rotundum – or unidentified comparable form
  †Meleagrinella
  †Meleagrinella curta
  †Melvius
  †Melvius thomasi
  †Meniscoessus
  †Meniscoessus gracilis – type locality for species
  †Meniscoessus intermedius
  †Meniscoessus robustus – type locality for species
  †Meniscoessus seminoensis – type locality for species
  †Meniscognathus – type locality for genus
  †Meniscognathus altmani – type locality for species
  †Menispermites
  †Menispermites belli
  †Menispermites cockerelli
  †Menispermites knightii
   †Menuites
  †Menuites complexus
  †Mesembrioxylon
  †Mesodma
  †Mesodma formosa
  †Mesodma hensleighi
  †Mesodma primaeva
  †Mesodma thompsoni – type locality for species
  †Metaptychoceras
  †Metoicoceras
  †Metoicoceras geslinianum
  †Metoicoceras mosbyense – or unidentified comparable form
  †Metoicoceras praecox
  †Micrabacia
  †Micrabacia radiata
  †Microtaenia
  †Microtaenia paucifolia
  †Microtaenia variabilis
   †Microvenator
  †Microvenator celer
  †Minerisporites
  †Minerisporites pseudorichardsonii
  Modiolus
  †Modiolus meekii
  †Modiolus subimbricatus
  †Montania – type locality for genus
  †Montania glandulosa – type locality for species
  †Moremanoceras
  †Moremanoceras costatum
  †Moremanoceras scotti
  †Moriconia
  †Moriconia cyclotoxon
  †Morosaurus
  †Myalina
  †Myalina postcarbonica
  †Myledaphus
  †Myledaphus bipartitus
   †Myophorella
  †Myophorella yellowstonensis
  Myrica
  †Myrica bolanderi – tentative report
  †Myrica nervosa
  †Myrtophyllum
  †Myrtophyllum torreyi
  †Mytiloides
  †Mytiloides stantoni
  †Mytilus
  †Mytilus whitei
caption: Life restoration of the Late Jurassic plesiosaur Megalneusaurus
exif: {}