Dinosaurs That Start With A
Discover a complete list of over 130 dinosaurs that start with the letter A.
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.Time Period: Hettangian to Sinemurian of the
Jurassic.
Diet: â€H‬erbivore.Size: Estimated to be about†‬5†‬to†‬6†‬meters
long.Time Period: Maastrichtian of the Cretaceous.
Diet: Herbivore.Size: Incomplete material makes sizing difficult.â€â€¬Estimates range from†‬22†‬to 40†‬meters long, but more commonly around 30 - 35 meters long.Time Period: Cenomanian of the Cretaceous.
Diet: Carnivore.Size: Unknown.Time Period: Early Cretaceous.
Diet: Uncertain.Size: Unknown due to lack of remains.Time Period: Albian to Aptian of the Cretaceous.
Diet: Herbivore.Size: Unknown due to lack of remains.Time Period: â€L‬ate Cretaceous.
Diet: Herbivore.Size: Uncertain due to lack of post cranial remains.Time Period: Campanian/Maastrichtian of the
Cretaceous.
Diet: Herbivore.Size: Femur†‬1.55†‬meters long.†‬Total body size
roughly estimated around†‬15†‬meters long.Time Period: Campanian-Maastrichtian of the
Cretaceous
Diet: Carnivore.Size: Skull about†‬75-80†‬centimetres long.†‬Bogy
length on holotype estimated at up to 7†‬meters long.Time Period: Mid/late Jurassic.
Diet: Herbivore.Size: Uncertain.Time Period: Cenomanian of the Cretaceous.
Diet: Herbivore.Size: Unknown.Time Period: Early Cretaceous.
Diet: Herbivore.Size: Estimated at about†‬15-18†‬meters long.Time Period: Aptian/Albian of the Cretaceous.
Diet: Herbivore.Size: Uncertain.Time Period: Albian of the Cretaceous.
Diet: Herbivore.Size: Uncertain due to lack of remains.Time Period: Rhaetian of the Triassic.
Diet: Herbivore.Size: Uncertain.Time Period: Late†(‬Campanian�) ‬Cretaceous.
Diet: Herbivore.Size: Unknown.Time Period: Late Jurassic.
Diet: Herbivore.Size: About†‬15†‬meters long.Time Period: Bathonian of the Jurassic.
Diet: Herbivore.Size: Estimated between†‬2†‬and†‬3†‬meters long.Time Period: Aptian/Albian of the Cretaceous.
Diet: Carnivore.Size: Uncertain due to low amount of fossil
remains.Time Period: Maastrichtian of the Cretaceous.
Diet: Herbivore.Size: Uncertain.Time Period: Campanian/Maastrichtian of the
Cretaceous.
Diet: Carnivore.Size: Uncertain due to incomplete fossil material.Time Period: Late Cretaceous.
Diet: Carnivore.Size: Up to†‬5†‬meters long.Time Period: Santonian of the Cretaceous.
Diet: Herbivore.Size: Reconstructed skull length roughly†‬106â€
‬centimetres long.Time Period: Late Maastrichtian of the Cretaceous.
Diet: Herbivore.Size: Skull†‬20†‬centimetres long,†‬total length
estimated about†‬2†‬meters long.Time Period: Aptian of the Cretaceous.
Diet: Herbivore.Size: About†‬15†‬meters long.Time Period: Tithonian of the Jurassic.
