**Tanycolagreus: A Jurassic Dinosaur** Tanycolagreus is a type of dinosaur that lived during the Late Jurassic period, around 153 to 150 million years ago. This dinosaur was found in North America and is classified as a theropod, which means it walked on two legs and was related to birds. **Discovery and Naming** Tanycolagreus was discovered …
Squalodon
Squalodon is an ancient group of whales that lived a long time ago during the Oligocene and Miocene periods, which was about 28 to 15 million years ago. These whales were part of a family called Squalodontidae and were named by a scientist named Jean-Pierre Sylvestre de Grateloup in 1840. The name Squalodon comes from …
Strenusaurus
Riojasaurus is a type of dinosaur that lived about 228 to 213 million years ago during the Late Triassic period. Its name means “lizard from La Rioja,” named after the area in Argentina where its fossils were discovered. Riojasaurus was a plant-eater, belonging to a group of dinosaurs known as sauropodomorphs. This group includes the …
Syngonosaurus
Syngonosaurus is an extinct type of dinosaur that lived a long time ago, in the Early Cretaceous period, around 105 to 100 million years ago. This dinosaur belonged to a group known as ornithopods, specifically called iguanodontians. It was first discovered in an area called Cambridge Greensand in England and was named by a scientist …
Tanystropheus
Tanystropheus is an extinct group of reptiles that lived during the Triassic Period, around 245 to 201 million years ago. Fossils have been discovered in places like Europe, Asia, and North America. One of the most striking features of Tanystropheus was its long neck, which was made up of 13 vertebrae. This neck was even …
Staurikosaurus
**Staurikosaurus: A Look at an Early Dinosaur** Staurikosaurus is a type of dinosaur that lived during the Late Triassic period, around 225 million years ago. It is one of the earliest known dinosaurs and was discovered in Brazil, specifically in an area called the Santa Maria Formation. **What Did Staurikosaurus Look Like?** Staurikosaurus was relatively …
Streptospondylus
**Streptospondylus: A Dinosaur from the Past** Streptospondylus was a type of dinosaur that lived during the Late Jurassic period around 161 million years ago. This dinosaur is noted as a medium-sized predator that might have been about 6 meters long, which is roughly the same as a large van, and weighed around 500 kilograms, similar …
Syntarsus
Coelophysis kayentakatae is an extinct dinosaur that lived around 200 to 196 million years ago during the Early Jurassic Period. It roamed what is now the southwestern United States. This dinosaur was first named Syntarsus kayentakatae but had to change names because “Syntarsus” was already used for a type of beetle. Later, it was called …
Tanystrosuchus
Tanystrosuchus is a name given to a type of dinosaur that lived a long time ago, around 208 million years ago, during the late Triassic period. Its name means “long crocodile,” and it is grouped into a category called theropods, which includes many meat-eating dinosaurs. So far, we have only found one important piece of …
Stegoceras
Stegoceras is a fascinating type of dinosaur known for its unique dome-shaped skull. This dinosaur was part of a group called pachycephalosaurs, which lived in what is now North America during the Late Cretaceous period, around 77.5 to 74 million years ago. The name “Stegoceras” means “horn roof,” and its species name, “validum,” translates to …