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Stegosaurus, meaning “roof lizard,” is a genus of stegosaurid armored dinosaur from the Kimmeridgian to early Tithonian stages of the Late Jurassic Period (145 mya) in what is now western North America. It was first discovered from a bone bed in the Morrison Formation in Morrison, Colorado, and was first described in 1877 by Othniel Charles Marsh. These first fossils became known as the type species S. armatus. Marsh initially believed the remains were from an aquatic turtle-like...

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. homheni, was described by Dong Zhiming in 1973 from the Tugulu Group in Xinjiang, western China. The specimen is known from a fragmentary skeleton lacking a skull. A second individual, W. ordosensis, which was found in the Ejinhoro Formation in...

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 unusual for having spiked ectoderms, probably from the tail, similar to the famed thagomizer found in stegosaurs. The type specimen, S. nigerensis, was described by Remes et al. in 2009. Photo Copyright and Credit

Tuojiangosaurus, meaning "Tuo River lizard," is a genus of stegosaurid dinosaur from the Late Jurassic Period. It was found in the Upper Shaximiao Formation of what is now Sichuan Province, China. The type species, T. multispinus (which is also the only known species) was named in 1977, based on two specimens. A mounted skeleton of T. multispinus is on display at the Municipal Museum of Chongqing in China. A mounted cast is also on display at the Natural history Museum in London....

Hesperosaurus, meaning "western lizard," is a genus of herbivorous dinosaur from the Kimmeridgian and Tithonian stages of the Late Jurassic Period (150 million years ago). It was discovered in the US state Wyoming in the Morrison Formation. Hesperosaurus was described in 2001 by Kenneth Carpenter, and named it for its location in the western United States. It is known from a nearly complete skull and much of the skeleton. The only species known is H. mjosi. Hesperosaurus was a type of...