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Dinosaurs

Siamosaurus, meaning "Siamese lizard," is a genus of theropod dinosaur from the Early Cretaceous Period of what is now Thailand. Little is known about this Cretaceous carnivore, but it is known from teeth that closely resemble the Spinosaurus, that it ...

Yunnanosaurus, meaning "Yunnan lizard," is a genus of prosauropod dinosaur from the Early to Mid Jurassic Period. This was perhaps one of the last living prosauropods of the time. It was discovered by Yang Zhongjian in the Lufeng Formation of Yunnan, C...

Segnosaurus, meaning "slow lizard," is a genus of therizinosaurid theropod dinosaur from the Cenomanian to Turonian stages of the Late Cretaceous Period. The type species, S. galinensis, was described in 1979 by Dr. A. Perle. It is known from three spe...

Yinlong, meaning "hidden dragon," is a genus of ceratopsian dinosaur from the Late Jurassic Period of what is now central Asia. A team of American and Chinese paleontologists -- Xu Xing, Catherine Forster, Jim Clark, and Mo Jinyou -- described and name...

Zuniceratops, meaning "Zuni-horned face," is a genus of ceratopsian dinosaur from the mid-Turonian age of the Late Cretaceous Period of what is now New Mexico. It was discovered in 1996 by eight-year-old Christopher James Wolfe, son of paleontologist D...

Wuerhosaurus is a genus of stegosaurid dinosaur from the Early Cretaceous Period of what is now China. It was one of the last genera of stegosaurs known to survive, since most others died out during the Late Jurassic Period. The type species, W. ho...

Wintonotitan, meaning "Winton titan," is a genus of titanosauriform dinosaur from the late Albian age of the of the Early Cretaceous Period. It was discovered 37 miles northwest of Winton, Australia -- for which its named. The type specimen is known fr...

Staurikosaurus, meaning "Southern Cross lizard," is a genus of dinosaur from the Carnian age of the Late Triassic Period (225 million years ago). The first known specimen was recovered from the paleontological site Jazigo Cinco of the Santa Maria Forma...

Spinophorosaurus, meaning "spine-bearing lizard," is a genus of early sauropod dinosaur from the Mid Jurassic Period or possibly earlier. It was discovered in a rock formation in Niger, belonging to the lower part of the Irhazer Group. The specimen is ...

Scutellosaurus, meaning "little-shielded lizard," is a genus of herbivorous dinosaur from the Early Jurassic Period of what is now North America (200 to 196 million years ago). It is classified in the sub-order Thyreophora, which include armored dinosa...

Scipionyx, meaning "Scipio's claw," and named after Scipione Breislak, is a genus of theropod dinosaur from the Early Cretaceous Period of what is now Italy (113 million years ago). It was discovered in 1981 by amateur paleontologist Giovanni Todesco n...

Tarchia, meaning "brainy one," is a genus of ankylosaurid dinosaur from the Campanian-Maastrichtian stages of the Late Cretaceous Period of what is now Mongolia. It was taken from the Barun Goyot Formation (previously called the "˜Lower Nemegt Beds"˜...

Tanycolagreus, meaning "long-limbed hunter," is a genus of dinosaur from the Oxfordian-Tithonian stages of the Late Jurassic Period of what is now North America. The holotype was discovered in the Bone Cabin Quarry in Albany County, Wyoming, in the Mor...

Utahraptor, meaning "Utah's predator," is a genus of theropod dinosaur from the upper Barremian stage of the early Cretaceous Period (approximately 126 million years ago). Utahraptor was discovered by James Kirkland, Robert Gaston, and Donald Burge in ...

Unenlagia, meaning "half-bird," is a genus of theropod dinosaur from the Late Cretaceous Period, and lived in what is now South America. It was a member of the extremely bird-like Gondwanan sub-family dromaeosaurs called unenlagiines, and was closely r...

Qiaowanlong is a genus of sauropod dinosaur from the Albian stage of the Early Cretaceous Period (100 million years ago). It was discovered in the Yujinzi Basin of Gansu, China in 2007. It came from the geological formation called the Xinminpu Group. ...

Saurornitholestes, meaning "lizard-bird thief," is a genus of dromaeosaurids dinosaur from the Campanian stage of the Late Cretaceous Period (75 million years ago) of what is now Alberta, Canada. It was discovered in the badlands of Dinosaur Provincial...

Unaysaurus, meaning "black water lizard," is a genus of sauropodomorph dinosaur from the Carnian to Norian ages of the Late Triassic Period (225 to 200 million years ago). It was discovered in southern Brazil, which at that time was connected to northw...

Ultrasaurus, meaning "Ultra lizard," is a genus of sauropod dinosaur from the Aptian and Albian stages of the Early Cretaceous Period (110 to 100 mya). It was discovered by Haang Mook Kim in South Korea. It is known from part of an upper forearm and so...

Sinraptor, meaning "Chinese thief," is a genus of theropod dinosaur from the Late Jurassic Period. It was discovered by Philip J. Currie and Xian Zhao in the Shishugou Formation during an expedition to the northwestern Chinese desert in 1987. The t...