Look up a dinosaur

Aardonyx was formally named in 2010 by A. M. Yates and colleagues.

Fossils referred to Aardonyx date to the Early Jurassic (Hettangian · Sinemurian), roughly 201.4 to 192.9 million years ago. Finds come from South Africa, including the Elliot Formation. It was a herbivore and could move on two or four legs.

Abdarainurus was formally named in 2020 by A. O. Averianov and A. V. Lopatin. The name honors a person tied to the fossil or its study.

It lived in the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from Mongolia, including the Alagteeg Formation. It was a herbivore and walked on four legs.

In 2022, B. Vila and colleagues published the name Abditosaurus. The name means “forgotten lizard.”

Fossils referred to Abditosaurus date to the Late Cretaceous (Maastrichtian), roughly 72.2 to 66 million years ago. Finds come from Spain, including the Conques Formation. It was a herbivore and walked on four legs.

Abelisaurus was formally named in 1985 by J. F. Bonaparte and F. E. Novas. The name honors a person tied to the fossil or its study.

Fossils referred to Abelisaurus date to the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from Argentina, including the Allen Formation. It was a carnivore and walked on two legs.

In 1975, J. A. Hopson published the name Abrictosaurus. The name means “wakeful lizard.”

It lived in the Early Jurassic (Hettangian · Sinemurian), roughly 201.4 to 192.9 million years ago. Finds come from Lesotho, including the Elliot Formation. It was a herbivore and walked on two legs.

In 1989, H. Ouyang published the name Abrosaurus.

It lived in the Middle Jurassic · Late Jurassic (Bajocian–Oxfordian), roughly 170.9 to 154.8 million years ago. Finds come from China, including the Shaximiao Formation. It was a herbivore and walked on four legs.

The genus Abydosaurus dates to 2010, the year D. Chure and colleagues described it. The name means “abydos lizard.”

Fossils referred to Abydosaurus date to the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from the United States, including the Cedar Mountain Formation. It was a herbivore and walked on four legs.

In 2018, H. E. Rivera-Sylva and colleagues published the name Acantholipan.

Fossils referred to Acantholipan date to the Late Cretaceous (Santonian), roughly 85.7 to 83.6 million years ago. Finds come from Mexico, including the Pen Formation. It was a herbivore and walked on four legs.

The genus Acanthopholis dates to 1867, the year T. H. Huxley described it. The name means “spiny scales.”

It lived in the Late Cretaceous (Cenomanian), roughly 100.5 to 93.9 million years ago. Finds come from the United Kingdom, including the West Melbury Marly Chalk Formation. It was a herbivore and walked on four legs.

In 1995, S. D. Sampson published the name Achelousaurus. The name means “achelous lizard.”

Fossils referred to Achelousaurus date to the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from the United States, including the Two Medicine Formation. It was a herbivore and walked on four legs.

In 2013, D. C. Evans and colleagues published the name Acheroraptor. The name means “underworld thief.”

Fossils referred to Acheroraptor date to the Late Cretaceous (Maastrichtian), roughly 72.2 to 66 million years ago. Finds come from the United States, including the Hell Creek Formation. It was a carnivore and walked on two legs.

The genus Achillesaurus dates to 2007, the year A. G. Martinelli and E. I. Vera described it. The name honors a person tied to the fossil or its study.

It lived in the Late Cretaceous (Santonian), roughly 85.7 to 83.6 million years ago. Finds come from Argentina, including the Bajo de la Carpa Formation. It was a carnivore and walked on two legs.

Achillobator was formally named in 1999 by A. Perle and colleagues. The name means “achilles hero.”

Fossils referred to Achillobator date to the Late Cretaceous (Cenomanian–Santonian), roughly 100.5 to 83.6 million years ago. Finds come from Mongolia, including the Bayanshiree Formation. It was a carnivore and walked on two legs.

In 2011, T. A. Gates and colleagues published the name Acristavus. The name means “non-crested grandfather.”

It lived in the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from the United States, including the Two Medicine Formation. It was a herbivore and could move on two or four legs.

Acrocanthosaurus was formally named in 1950 by J. W. Stovall and W. Langston.

It lived in the Early Cretaceous (Aptian · Albian), roughly 121.4 to 100.5 million years ago. Finds come from the United States, including the Antlers Formation. It was a carnivore and walked on two legs.

The genus Acrotholus dates to 2013, the year D. C. Evans and colleagues described it.

Fossils referred to Acrotholus date to the Late Cretaceous (Santonian), roughly 85.7 to 83.6 million years ago. Finds come from Canada, including the Milk River Formation. It was a herbivore and walked on two legs.

In 2006, R. M. Santucci and R. J. Bertini published the name Adamantisaurus. The name honors a person tied to the fossil or its study.

Fossils referred to Adamantisaurus date to the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Brazil, including the Adamantina Formation. It was a herbivore and walked on four legs.

In 1983, R. Barsbold published the name Adasaurus. The name means “evil lizard.”

It lived in the Late Cretaceous (Maastrichtian), roughly 72.2 to 66 million years ago. Finds come from Mongolia, including the Nemegt Formation. It was a carnivore and walked on two legs.

The genus Adelolophus dates to 2014, the year T. A. Gates and colleagues described it. The name means “unknown crest.”

Fossils referred to Adelolophus date to the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from the United States, including the Wahweap Formation. It was a herbivore and could move on two or four legs.

Adeopapposaurus was formally named in 2009 by R. N. Martínez. The name means “far eating lizard.”

Fossils referred to Adeopapposaurus date to the Early Jurassic (Hettangian–Toarcian), roughly 201.4 to 174.7 million years ago. Finds come from Argentina, including the Cañón del Colorado Formation. It was a herbivore and walked on two legs.

Adratiklit was formally named in 2020 by S. C. R. Maidment and colleagues. The name means “mountain lizard.”

It lived in the Middle Jurassic (Bathonian · Callovian), roughly 168.2 to 161.5 million years ago. Finds come from Morocco, including the El Mers III Formation. It was a herbivore and walked on four legs.

The genus Adynomosaurus dates to 2019, the year A. Prieto-Márquez and colleagues described it.

Fossils referred to Adynomosaurus date to the Late Cretaceous (Maastrichtian), roughly 72.2 to 66 million years ago. Finds come from Spain, including the Conques Formation. It was a herbivore and could move on two or four legs.

Aegyptosaurus was formally named in 1932 by E. Stromer.

Fossils referred to Aegyptosaurus date to the Late Cretaceous (Cenomanian), roughly 100.5 to 93.9 million years ago. Finds come from Egypt, including the Bahariya Formation. It was a herbivore and walked on four legs.

Aeolosaurus was formally named in 1987 by J. E. Powell. The name honors a person tied to the fossil or its study.

It lived in the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Argentina, including the Angostura Colorada Formation. It was a herbivore and walked on four legs.