Dinosaurs - M
- Macrophalangia
- Macrurosaurus
- Maiasaura
- Majungasaurus
- Majungatholus
- Malawisaurus
- Maleevosaurus
- Mamenchisaurus
- Mandschurosaurus
- Marshosaurus
- Massospondylus
- Megalosaurus
- Melanorosaurus
- Metriacanthosaurus
- Microceratops
- Micropachycephalosaurus
- Microvenator
- Minmi
- Mongolosaurus
- Monkonosaurus
- Monoclonius
- Mononykus
- Montanoceratops
- Mussaurus
- Muttaburrasaurus