**Agnosphitys: An Extinct Dinosaur** Agnosphitys is a genus of dinosaur-like creatures that lived during the Late Triassic period, around 208 million years ago. It is known through the discovery of its only species, called Agnosphitys cromhallensis. **What Do We Know About Agnosphitys?** The fossils of Agnosphitys include some important bones: – Ilium (part of the …

Agilisaurus is a dinosaur that lived during the Middle Jurassic period, around 168 to 164 million years ago. It is considered an ornithischian dinosaur, a group known for their plant-eating habits. Agilisaurus was about 3.5 to 4 feet long and weighed around 40 kilograms. One of its interesting features was its leaf-shaped teeth, which were …

Aggiosaurus is an extinct group of reptiles that lived during the Late Jurassic period, around 160 to 157 million years ago. This creature was found in Nice, a city in southeastern France, and is part of a family known as Metriorhynchidae, which are related to modern crocodiles. Aggiosaurus includes only one species named Aggiosaurus nicaeensis. …

**Agathaumas: A Unique Dinosaur** Agathaumas is a type of dinosaur that lived about 66 million years ago during the Late Cretaceous period in what is now Wyoming, USA. The name Agathaumas means “great wonder” in Ancient Greek. When it was first discovered, it was thought to be one of the largest land animals ever found. …

Afrovenator is a type of dinosaur that lived during the Jurassic period, around 167 to 157 million years ago. Its name means “African hunter” because it was found in Africa, specifically in the Niger region. This dinosaur belonged to a family called Megalosauridae, which includes other large, meat-eating dinosaurs. **Discovery** Afrovenator was discovered in 1993. …

**Afromimus: A Unique Dinosaur from Africa** Afromimus is a fascinating dinosaur that lived during the Early Cretaceous period, about 112 million years ago. Its name means “Africa mimic,” reflecting its origin from the Elrhaz Formation in Niger, Africa. The only known species of Afromimus is called Afromimus tenerensis, named in 2017 by a scientist named …

Aetonyx is a dinosaur from the Early Jurassic period, around 201 to 193 million years ago. It was found in southern Africa, particularly near a place called Fouriesburg in the Free State Province. The only known species of Aetonyx is called Aetonyx palustris. The dinosaur was first described by a scientist named Robert Broom in …

Aerosteon is a type of dinosaur that lived during the Late Cretaceous period in what is now Argentina. It was first found in 1996 in a place called the Anacleto Formation. The name “Aerosteon” means “air bone,” which makes sense because it had some air-filled bones similar to those found in birds. The first description …

**Aepyornithomimus: A Unique Dinosaur** Aepyornithomimus is a type of dinosaur known as an ornithomimid. This dinosaur lived during the Late Cretaceous period, around 75 million years ago, in what is now Mongolia. It is named Aepyornithomimus, which means “Aepyornis mimic.” **Discovery of Aepyornithomimus** The first remains of Aepyornithomimus were found in 1994 during an archaeological …

Aepisaurus was a type of dinosaur that lived around 100.5 million years ago during the Early Cretaceous period. This dinosaur was part of a group called sauropods, which were known for their large size and long necks. The name Aepisaurus comes from Greek words meaning “lofty lizard.” It was discovered in France, specifically in an …