Look up a dinosaur

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 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.

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.

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.

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.

In 2017, P. C. Sereno published the name Afromimus. The name means “africa mimic.”

It lived in the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from Niger, including the Elrhaz Formation. It was a herbivore and walked on two legs.

In 1994, P. C. Sereno and colleagues published the name Afrovenator. The name means “african hunter.”

It lived in the Middle Jurassic (Bathonian · Callovian), roughly 168.2 to 161.5 million years ago. Finds come from Niger, including the Tiourarén Formation. It was a carnivore and walked on two legs.

The genus Albertavenator dates to 2017, the year D. C. Evans and colleagues described it. The name means “alberta hunter.”

Fossils referred to Albertavenator date to the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Canada, including the Horseshoe Canyon Formation. It was a carnivore and walked on two legs.

The genus Albertonykus dates to 2009, the year N. R. Longrich and P. J. Currie described it. The name means “alberta claw.”

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

The genus Albertosaurus dates to 1905, the year H. F. Osborn described it. The name means “alberta lizard.”

Fossils referred to Albertosaurus date to the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Canada, including the Horseshoe Canyon Formation. It was a carnivore and walked on two legs.

In 2011, S. J. Nesbitt and colleagues published the name Albinykus. The name honors a person tied to the fossil or its study.

Fossils referred to Albinykus date to the Late Cretaceous (Santonian · Campanian), roughly 85.7 to 72.2 million years ago. Finds come from Mongolia, including the Javkhlant Formation. It was a carnivore and walked on two legs.

Alcmonavis was formally named in 2019 by O. W. M. Rauhut and colleagues.

It lived in the Late Jurassic (Tithonian), roughly 149.2 to 143.1 million years ago. Finds come from Germany, including the Mörnsheim Formation. It walked on two legs. Its diet is too uncertain to state.

The genus Alectrosaurus dates to 1933, the year C. W. Gilmore described it. The name means “alone lizard.”

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

The genus Alioramus dates to 1976, the year S. M. Kurzanov described it. The name means “different branch.”

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.

In 1877, O. C. Marsh published the name Allosaurus. The name means “different lizard.”

It lived in the Late Jurassic (Kimmeridgian · Tithonian), roughly 154.8 to 143.1 million years ago. Finds come from the United States, including the Morrison Formation. It was a carnivore and walked on two legs.

Almas was formally named in 2017 by R. Pei and colleagues.

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

Alnashetri was formally named in 2012 by P. J. Makovicky and colleagues. The name means “slender thighs.”

It lived in the Late Cretaceous (Cenomanian), roughly 100.5 to 93.9 million years ago. Finds come from Argentina, including the Candeleros Formation. It was a carnivore and walked on two legs.

In 2024, O. W. M. Rauhut and colleagues published the name Alpkarakush. The name honors a person tied to the fossil or its study.

It lived in the Middle Jurassic (Callovian), roughly 165.3 to 161.5 million years ago. Finds come from Kyrgyzstan, including the Balabansai Formation. It was a carnivore and walked on two legs.

The genus Altispinax dates to 1923, the year F. V. Huene described it. The name means “with high spines.”

It lived in the Early Cretaceous (Valanginian), roughly 137.1 to 132.6 million years ago. Finds come from the United Kingdom, including the Wadhurst Clay Formation. It was a carnivore and walked on two legs.

In 1991, J. F. Bonaparte published the name Alvarezsaurus. The name means “don Gregorio Alvarez.”

Fossils referred to Alvarezsaurus date to 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.

In 1993, D. A. Russell and Z. M. Dong published the name Alxasaurus. The name means “alxa lizard.”

It lived in the Early Cretaceous (Aptian), roughly 121.4 to 113.2 million years ago. Finds come from China, including the Bayin-Gobi Formation. It was a herbivore and walked on two legs.