page_title: List of dinosaurs
section_title: M
hierarchical_section_title: List of dinosaurs / M
caption_attribution_description: English: Simple reconstruction of Massospondylus carinatus, the early Jurassic "prosauropod" from Africa.
context_page_description: The following is a list of dinosaurs. Some of them, such as Archaeopteryx, are considered to be birds. Some doubtful Mesozoic birds are included in this list.
context_section_description: Macelognathus –  a sphenosuchian crocodilian
  Machairasaurus
  Machairoceratops
  Macrocollum
  Macrodontophion -  a member of Lophotrochozoa
  Macrogryphosaurus
  Macrophalangia – junior synonym of Chirostenotes
  "Macroscelosaurus" – nomen nudum; probable junior synonym of Tanystropheus
  Macrurosaurus
  "Madsenius" – nomen nudum, Allosaurus
  Magnamanus
  Magnapaulia
  Magnirostris
  Magnosaurus
  "Magulodon" – nomen nudum
  Magyarosaurus
  Mahakala
  Mahuidacursor
  Maiasaura
  Majungasaurus
  Majungatholus – junior synonym of Majungasaurus
  Malarguesaurus
  Malawisaurus
  Maleevosaurus – junior synonym of Tarbosaurus
  Maleevus
  Mamenchisaurus
  Mandschurosaurus
  Manidens
  Manospondylus – synonym of Tyrannosaurus
  Mansourasaurus
  Mantellisaurus
  Mantellodon - possible junior synonym of Mantellisaurus
  Mapusaurus
  Maraapunisaurus
  Marasuchus –  a non-dinosaurian dinosauromorph
  Marisaurus
  Marmarospondylus
  Marshosaurus
  Martharaptor
  Masiakasaurus
  Massospondylus
  Matheronodon
  Maxakalisaurus
  Medusaceratops
  "Megacervixosaurus" – nomen nudum
  "Megadactylus" – preoccupied name, now known as Anchisaurus
  "Megadontosaurus" – nomen nudum; Microvenator
  Megalosaurus
  Megapnosaurus – junior synonym of Coelophysis
  Megaraptor
  Mei
  Melanorosaurus
  Mendozasaurus
  Mercuriceratops
  Meroktenos
  Metriacanthosaurus
  "Microcephale" – nomen nudum
  "Microceratops" – preoccupied name, now known as Microceratus
  Microceratus
  Microcoelus
  "Microdontosaurus" – nomen nudum
  Microhadrosaurus
  Micropachycephalosaurus
  Microraptor
  Microvenator
  Mierasaurus
  "Mifunesaurus" – nomen nudum
  Minmi
  Minotaurasaurus
  Miragaia
  Mirischia
  Mnyamawamtuka
  Moabosaurus
  Mochlodon
  "Mohammadisaurus" – nomen nudum; Tornieria
  Mojoceratops – probable junior synonym of Chasmosaurus
  Mongolosaurus
  Mongolostegus
  Monkonosaurus
  Monoclonius
  Monolophosaurus
  "Mononychus" – preoccupied name, now known as Mononykus
  Mononykus
  Montanoceratops
  Morelladon
  Morinosaurus
  Moros
  Morosaurus – junior synonym of Camarasaurus
  Morrosaurus
  Mosaiceratops
  "Moshisaurus" – nomen nudum; possibly Mamenchisaurus
  "Mtapaiasaurus" – nomen nudum, probably Giraffatitan
  "Mtotosaurus" – nomen nudum; Dicraeosaurus
  Murusraptor
  Mussaurus
  Muttaburrasaurus
  Muyelensaurus
  Mymoorapelta
caption: Artist's reconstruction of Massospondylus.
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