Month: July 2025

Serikornis is a small, feathered dinosaur that lived during the Late Jurassic period, specifically in a time known as the Oxfordian stage. This dinosaur was discovered in the Tiaojishan Formation in Liaoning, China, and was first described in 2017. The official name for this dinosaur is Serikornis sungei. The name “Serikornis” means “Ge Sun’s silk …

**Serendipaceratops** is a genus of dinosaurs that lived during the Early Cretaceous period, around 122.5 to 112 million years ago. Its name means “serendipitous horned face,” which hints at its likely resemblance to other horned dinosaurs. The first bone from Serendipaceratops, a lower arm bone called an ulna, was discovered in 1993 in Australia, near …

**Plateosaurus: The Broad Lizard Dinosaur** Plateosaurus is a type of dinosaur that lived a long time ago during the Late Triassic period, around 214 to 204 million years ago. Its name means “broad lizard,” though it’s often wrongly called “flat lizard.” This dinosaur was found mostly in what is now Germany and parts of Europe. …

Barilium is a type of dinosaur that lived a long time ago during the Early Cretaceous period, about 140 million years ago. When it was first discovered in 1888, scientists thought it was part of a different dinosaur group called Iguanodon. This idea was based on fossils found by a collector named Charles Dawson. In …

**Sektensaurus: A Unique Dinosaur from Patagonia** Sektensaurus is a type of dinosaur that lived a long time ago during the Late Cretaceous period, around 76 to 72 million years ago. This dinosaur was discovered in Patagonia, which is in Argentina. The name “Sektensaurus” means “island lizard,” coming from the Tehuelche word for “island.” **Classification** Sektensaurus …

Seitaad is a type of dinosaur that lived a long time ago, during the Early Jurassic period, which was around 183 million to 174 million years ago. These dinosaurs were found in what we now call southern Utah in the United States. The name “Seitaad” comes from the Navajo word for a mythological sand monster …

**Diplodocus: The Long-Necked Dinosaur** Diplodocus is a famous dinosaur that lived during the Late Jurassic period, around 152 to 149 million years ago. It was found mostly in what is now North America. The name “Diplodocus” means “double beam,” which refers to unique bones in its tail that resemble beams. **What did Diplodocus look like?** …

**Segnosaurus: An Interesting Dinosaur from the Late Cretaceous Period** Segnosaurus is a type of therizinosaur dinosaur that lived in what is now southeastern Mongolia during the Late Cretaceous period, around 102 to 86 million years ago. **Discovery and Name** The first fossils of Segnosaurus were found during joint Soviet-Mongolian expeditions in the 1970s. In 1979, …

**Segisaurus: A Small Jurassic Dinosaur** Segisaurus, which means “Tsegi Canyon lizard,” is a type of dinosaur that lived in the Early Jurassic period, about 200 to 195 million years ago. It was a small theropod dinosaur, similar in size to a goose. Segisaurus measured around 1 meter (3.3 feet) long and weighed between 4 and …

Sefapanosaurus is an extinct type of dinosaur that lived about 200 million years ago, during the Late Triassic to Early Jurassic periods. This dinosaur was a herbivore, meaning it ate plants. It belonged to a group of dinosaurs called sauropodomorphs, which were the main plant-eating dinosaurs for a very long time throughout the Mesozoic Era. …