Dinosaurs That Start With M
Explore a complete list of over 71 dinosaurs that start with the letter M.
Each dinosaur listed has a dedicated page with information on classification, diet, size, fossil evidence, geographic distribution, and maps of known fossil locations, where available. Pages may also include size comparison charts, fossil representations, and in-depth descriptions based on current scientific research.
The amount of information varies by species, depending on the completeness of fossil discoveries.
Diet: Herbivore.Size: Uncertain due to lack of remains.Time Period: Late Cretaceous.
Diet: Herbivore.Size: Estimated between†‬5.5†‬and†‬6†‬meters
long.Time Period: Kimmeridgian to Tithonian of the
Jurassic.
Diet: Carnivore.Size: Roughly up to†‬2†‬meters long.Time Period: Albian of the Cretaceous.
Diet: Herbivore.Size: Holotype estimated to be about†‬7.6†‬meters
long.†‬Full adult size unknown.Time Period: Aptian/Cenomanian of the Cretaceous.
Diet: Herbivore.Size: Estimated to be about†‬10†‬meters long.Time Period: Aptian of the Cretaceous.
Diet: Herbivore.Size: Uncertain due to incomplete remains,â€
‬possibly up to†‬4†‬meters long.Time Period: Campanian of the Cretaceous.
Diet: Herbivore.Size: Uncertain due to incomplete fossil material,â€
‬but possibly up to†‬5†‬-†‬6†‬meters long based upon comparison to
Chasmosaurus†‬-†‬refer to main text for details.Time Period: Campanian of†‬the Cretaceous.
Diet: Herbivore.Size: Unknown due to lack of remains.Time Period: Aptian/Albian of the Cretaceous.
Diet: Herbivore.Size: Uncertain but roughly estimated to be aboutâ€
‬5†‬meters long.Time Period: Kimmeridgian of the Jurassic.
Diet: Herbivore.Size: Unknown.Time Period: Late Cretaceous.
Diet: Carnivore.Size: 5†‬meters long.Time Period: Callovian of the Jurassic.
Diet: Insectivore�Size: Estimated about†‬1†‬meter long.Time Period: Campanian of the Cretaceous.
Diet: Herbivore.Size: Approximately 3 meters long.Time Period: Maastrichtian of the Cretaceous.
Diet: Herbivore.Size: Roughly estimated at about†‬6†‬meters long.Time Period: Barremian of the Cretaceous.
Diet: Carnivore.Size: Hind limb length estimated at†‬1.2†‬meters.â€
‬Total body size unknown.Time Period: Cenomanian of the Cretaceous.
Diet: Carnivore.Size: Uncertain due to lack of fossil remains.Time Period: Maastrichtian of the Cretaceous.
Diet: Carnivore.Size: Holotype individual estimated to be aboutâ€
‬6.4†‬meters in length.†‬However this is of an immature individual,â€
‬fully grown adults would have been larger.Time Period: Coniacian of the Cretaceous.
Diet: Herbivore.Size: First juveniles ranged between†‬20†‬andâ€
‬37†‬centimetres long.†‬Adult specimens now known and the estimated
adult size is†63†‬meters.Time Period: Norian/Rhaetian of the Triassic.
Diet: Herbivore.Size: Usually credited with being around†‬7â€
‬meters long,†‬occasional slightly larger estimates are made.Time Period: Albian to early Cenomanian of the
Cretaceous.
Diet: Herbivore.Size: About†‬11†‬meters long.Time Period: Coniacian of the Cretaceous.
Diet: Herbivore.Size: Roughly†‬3†‬meters long.Time Period: Kimmeridgian to Tithonian of the
Jurassic.
