Apatodon is a rare and uncertain type of dinosaur that lived during the Late Jurassic period, about 156 to 145 million years ago. It belongs to a group of dinosaurs called theropods, which are known for being bipedal and often carnivorous. The only species of Apatodon is known as Apatodon mirus, and it was first …

Aorun is a type of dinosaur that lived around 161.6 million years ago during the Late Jurassic Period. It is classified as a theropod, which means it was a carnivorous dinosaur. **Discovery and Naming** Aorun was discovered in 2006 in Xinjiang, China, by a team led by James Clark and his student Jonah Choiniere. They …

Aoniraptor is an extinct type of dinosaur that lived during the Late Cretaceous period, about 96 to 91 million years ago. This dinosaur was found in Argentina, specifically in a place called the Huincul Formation. Aoniraptor belongs to a group called theropods, which are known for being mostly carnivorous and often bipedal. The name “Aoniraptor” …

Anzu is a fascinating dinosaur that lived around 66 million years ago during the Late Cretaceous period. It was discovered in areas that are now North Dakota, South Dakota, and Montana in the United States. The full name of this dinosaur is Anzu wyliei, and it was named in 2014. This dinosaur belongs to a …

Antrodemus is a type of dinosaur that lived during the Late Jurassic period, about 150 million years ago. Scientists believe it likely lived in what is now Colorado, USA. The name Antrodemus means “chamber-bodied.” This dinosaur has only one known species, called Antrodemus valens. It was first named by a scientist named Joseph Leidy in …

**Anthodon: An Ancient Reptile** Anthodon is an extinct group of reptiles that lived during the Permian period, about 254 to 252 million years ago. Fossils of this creature were found in South Africa and Tanzania. **Discovery History** In 1845, two amateur geologists named William Guybon Atherstone and Andrew Geddes Bain found fossils near a place …

Antetonitrus is a type of dinosaur that lived during the Early Jurassic period in what is now South Africa. It is part of a group called sauropodiforms, which are closely related to the larger, famous sauropods like the Brontosaurus. The name “Antetonitrus” comes from Latin, meaning “before thunder.” This refers to its earlier existence compared …

Antarctosaurus is a type of dinosaur that lived during the Late Cretaceous Period, around 83 million years ago. It is part of a group called sauropods, which are known for their long necks and large bodies. Antarctosaurus is interesting because it was discovered in Argentina, not Antarctica, even though its name means “southern lizard.” The …

**Antarctopelta: The Unique Antarctic Dinosaur** Antarctopelta is a fascinating dinosaur that lived during the Late Cretaceous period, around 72 to 70 million years ago. This dinosaur roamed what is now James Ross Island in Antarctica. It belongs to a group of dinosaurs known as ankylosaurs, which were large, four-legged herbivores known for their tough, armored …

Anserimimus is a type of dinosaur that lived during the Late Cretaceous period, about 70 million years ago. Its name means “goose mimic,” but it didn’t actually look like a goose. Anserimimus was a fast runner with long legs and slender arms. It was likely an omnivore, meaning it ate both plants and small animals. …