page_title: List of crurotarsan genera
section_title: M
hierarchical_section_title: List of crurotarsan genera / M
caption_attribution_description: English: Photo of juvenile black caiman in Peru
context_page_description: This list of crurotarsans is a comprehensive listing of all genera that have ever been included in the clade Crurotarsi, excluding purely vernacular terms. Under some definitions Crurotarsi includes all archosaurs, but this list excludes archosaur genera that are included in Avemetatarsalia. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful, or were not formally published, as well as junior synonyms of more established names, and genera that are no longer considered crurotarsan. Extinct taxa are denoted with a dagger. The list contains 584 names, of which approximately 495 are considered either valid crurotarsan genera or nomina dubia.
context_section_description: †Macelognathus
  †Machaeroprosopus
  †Machimosaurus
  †Macrospondylus — junior synonym of Steneosaurus
  †Macrorhynchus — junior synonym of Pholidosaurus
  †Magyarosuchus
  †Mahajangasuchus
  †Malawisuchus
  †Maledictosuchus
  †Mandasuchus
  †Manracosuchus — probable junior synonym of Allognathosuchus
  †Maomingosuchus
  †Mariliasuchus
  †Marmosaurus
  †Maroccosuchus
  †Massaliasuchus
  Mecistops
  †Megadontosuchus
  †"Megalosaurus"
  †Mekosuchus
  Melanosuchus
   
  †Melitosaurus — junior synonym of Tomistoma
  †Menatalligator
  †Meridiosaurus
  †Mesorhinosuchus
  †"Mesorhinus" — preoccupied by the macraucheniid mammal Mesorhinus; now known as Mesorhinosuchus
  †Metiorychus — lapsus calami of Metriorhynchus
  †Metriorhynchus
  †Miadanasuchus
  †Microchampsa
  †Microsuchus
  Molinia — junior synonym of Crocodylus
  †Montealtosuchus
  †Montsecosuchus
  †Morrinhosuchus
  †Mosellaesaurus — junior synonym of Pelagosaurus
  †Motinia — junior synonym of Crocodylus
  †Mourasuchus
  †Musturzabalsuchus
  †Mycterosuchus — junior synonym of Steneosaurus
  †Mystriosaurus — junior synonym of Steneosaurus
  †Mystriosuchus
caption: A black caiman (Melanosuchus).
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