Look up a dinosaur

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 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.

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.

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.

Aepyornithomimus was formally named in 2017 by T. Chinzorig and colleagues. The name means “aepyornis mimic.”

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

Aerosteon was formally named in 2008 by P. C. Sereno and colleagues.

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

Agathaumas was formally named in 1872 by E. D. Cope. The name means “much wonder.”

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

Agujaceratops was formally named in 2006 by S. G. Lucas and colleagues. The name means “horned face from Aguja.”

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

The genus Ahshislepelta dates to 2011, the year M. E. Burns and R. M. Sullivan described it. The name means “ah-shi-sle-pah Wash shield.”

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

The genus Ahshislesaurus dates to 2025, the year S. G. Dalman and colleagues described it. The name means “salt, it is gray.”

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

In 2010, A. Ősi and colleagues published the name Ajkaceratops. The name means “horned face.”

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