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: Femur of holotype individual†‬2.146†‬meters
long.†‬Full size particularly body length uncertain due to lack of
other known body parts.Time Period: Cenomanian/Turonian of the Cretaceous.
Diet: Carnivore.Size: Estimated†‬6†‬meters long.Time Period: Aptian of the Cretaceous.
Diet: Carnivore.Size: Uncertain.Time Period: Maastrichtian of the Cretaceous.
Diet: Herbivore.Size: Uncertain but holotype roughly estimated to be
about†‬25†‬meters long.Time Period: Campanian/Maastrichtian of the
Cretaceous.
Diet: Carnivore.Size: 5†‬meters long,†‬skull†‬80†‬centimetres
long.Time Period: Campanian/Maastrichtian of the
Cretaceous.
Diet: Herbivore.Size: Estimated 15 meters long.Time Period: Albian of the Cretaceous.
Diet: Herbivore.Size: Possibly up to 4.2 meters long.Time Period: Campanian of the Cretaceous.
Diet: Carnivore.Size: Estimated at†‬1†‬meter long.Time Period: Kimmeridgian of the Jurassic.
Diet: Usually thought to be an omnivore or herbivore
though has been suggested to be an insectivore.Size: 1.5†‬meters long.Time Period: Campanian/Maastrichtian of the
Cretaceous.
