Xingxiulong Xingxiulong is a type of dinosaur that lived during the Early Jurassic period, around 2017 million years ago. Its name means “Xingxiu Bridge dragon” and it comes from China. This dinosaur belongs to a group called sauropodomorphs which includes both early dinosaurs and the massive sauropods we often think of, like Brachiosaurus. There are …

Xingtianosaurus is an extinct genus of dinosaur that belongs to a group called theropods. These dinosaurs lived during the Early Cretaceous period, around 125 million years ago, in what is now China. The only species known in this genus is called Xingtianosaurus ganqi. It was discovered and named in 2019. This dinosaur is part of …

Xiaotingia is a type of dinosaur known to have lived during the Middle to Late Jurassic period, around 165 to 153 million years ago. It was discovered in western Liaoning, China and is classified as a paravian theropod dinosaur. Xiaotingia belongs to a family called Anchiornithidae and consists of just one species, named Xiaotingia zhengi. …

Xiaosaurus Xiaosaurus is a type of small dinosaur that lived during the Middle Jurassic period, around 170 to 163 million years ago. It was a herbivore, meaning it ate plants, and it roamed in what is now the Sichuan Basin in China. **Discovery and Naming** The first Xiaosaurus fossils were found in the late 1970s …

Xianshanosaurus is a type of dinosaur that lived during the Early Cretaceous period, specifically in a time called Aptian to Albian. This dinosaur was discovered in the Ruyang Basin, located in Henan Province, China. The name “Xianshanosaurus” means “Xian Mountain Lizard,” referring to the mountain near where its fossils were found. The only known species …

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**Xenoposeidon: The Strange Dinosaur** Xenoposeidon is a unique kind of dinosaur that lived during the Early Cretaceous period, around 140 million years ago. This dinosaur was found in what is now England. Its name means “strange Poseidon,” referring to another dinosaur called Sauroposeidon. **What Do We Know About Xenoposeidon?** Xenoposeidon is known from a single …

Xenoceratops is an ancient dinosaur that lived during the Late Cretaceous period, around 80 million years ago. This dinosaur was discovered in Alberta, Canada, and its name means “alien horned face,” highlighting its unique features among ceratopsian dinosaurs. The only known species of Xenoceratops is called Xenoceratops foremostensis. It was first found in 1958 when …

Wyleyia is a type of extinct bird that lived a long time ago during the early Cretaceous period, about 138 million years ago. It comes from a place called Sussex in England. This bird is known from just one piece of a bone called a humerus, which is part of the wing. Wyleyia was named …

Wulong bohaiensis is a dromaeosaurid dinosaur that lived during the Early Cretaceous period, around 120 million years ago. This dinosaur is known from the Jiufotang Formation in China and is recognized as a juvenile. The name “Wulong” translates to “dancing dragon,” which reflects the lively pose of the fossil. The species name “bohaiensis” refers to …