sauro-, saur-, -saurus, -saurid, -saur, -sauria, -saurian

A “perforated (frill) lizard” from Late Cretaceous Montana to Texas, USA; and Canada. The name is based on Greek toreo, “pierce, perforate”, a reference to the posterior crest, which is perforated by a pair of large openings, according to the nomenclator, Othniel Charles Marsh. He explained that the name provides no basis for interpreting Torosaurus as “piercing lizard” for its horns nor as “bulging lizard” from Latin torus, “a bulge”. The non-classical Spanish word toro, “bull” is not the correct derivation of the name. Named by paleontologist Othniel Charles Marsh (1831-1899) in 1891.

A “savage lizard” from Late Jurassic period and found in western North America; specifically, Colorado and Wyoming. Named by British paleontologist Peter M. Galton and U. S. paleontologist James A. Jensen in 1979.

“Tsintao lizard” from Late Cretaceous Shanong, China. The name comes from Chinese Qingdao, “green” plus dao, “island”. Named by Chinese paleontologist Yang Zhong-jian (also known as: Chung Chien Young) in 1958.

“Maori-tuarangi lizard” or “ancient lizard” from Late Cretaceous New Zealand. This fossil was named in reference to a large elasmosaur found in New Zealand (North Island, Manghousnga Stream), home of the Maori people. The Maori tuarangi, means “ancient”. Named by Joan Wiffen and Moisley in 1986.

“Tugulu lizard” from Early Cretaceous Sinkiang, northwest China. Named by Chinese paleontologist Zhiming Dong in 1973.

“Toujiang (Tuo River) lizard” from Late Jurassic Tuojiang (Tuo Jiang), a river in Sichuan Province, near Zigong City, China. Named by Chinese paleontologists Zhiming Dong, Li K., Shiwu Zhou, and Yihong Zhang in 1977.

A “swollen lizard” from Late Cretaceous Kansas and New Zealand, but it is not considered a dinosaur.

The “tyrant lizards” included some of the biggest flesh-eating land animals of all time. They are believed to have lived during the Late Cretaceous period.

A “tyrant (despot) lizard” from Late Cretaceous western North America and China. This fossil has also been called Dynamosaurus, Tarbosaurus, and Manospondylus. Named by U. S. paleontologist Henry Fairfield Osborn in 1905.

A “ugly lizard” from Scandinavian ugro, “ugly”. A Triceratops. Named by Emily A. Cobabe and David E. Fastovsky in 1987.

This nomenclature (“Uinta lizard” [County in Utah where it was discovered]) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Camarasaurus. Named by William J. Holland in 1919.

An “ultra (excessive) lizard” from Late Jurassic western Colorado, USA. Discovered in Colorado by dinosaur digger U. S. paleontologist James A. Jensen of Brigham Young University, this extremely large dinosaur was formerly known as Supersaurus. The name was changed to Ultrasauros because it was previously claimed for a South Korean specimen. Named by Korean paleontologist Haang Mook Kim in 1983.

“Unquillo River lizard” from Late Cretaceous northwest Argentina. The fossil was found in the Candaleria region of Salta Province, Argentina. Named by Jaime Eduardo Powell in 1979.

A “weald (wealden) lizard” from Early Cretaceous southern England and Niger in West Africa. It was named for the Early Cretaceous Wealden deposits in which its fossils were found. Named by British paleontologist Peter M. Galton in 1977.

A “monitor lizard” that was a mammal-like reptile which was not a dinosaur. It lived during the Early Permian in what is now Texas and Oklahoma.