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“`html Sierraceratops: Profile of a Prehistoric Giant Sierraceratops Sierraceratops (SEE-air-ah-SAIR-ah-tops; “Sierra horned face”) is a genus of chasmosaurine ceratopsid dinosaur that roamed what is now New Mexico in the United States during the Late Cretaceous period, approximately 72 million years ago. The name Sierraceratops refers to Sierra County, New Mexico, where its fossils were discovered, […]

“`html Sigilmassasaurus: Profile of a Prehistoric Giant Sigilmassasaurus Sigilmassasaurus (SIH-jill-MAS-sah-SAWR-us; “Sijilmassa lizard”) is a genus of large theropod dinosaur that lived during the Late Cretaceous period, specifically the Cenomanian stage, approximately 99 to 94 million years ago. Its fossils, primarily vertebrae, have been discovered in the Kem Kem Beds of Morocco, North Africa. The name

Siluosaurus: Profile of a Prehistoric Giant Siluosaurus Siluosaurus (SILL-oo-oh-SAWR-us; “Lizard from the Silk Road region”) is a genus of small ornithopod dinosaur that lived during the Early Cretaceous period, approximately 125 to 100 million years ago. Its fossils were discovered in the Xinminpu Group in Gansu Province, China. The name Siluosaurus honors the famous Silk

Silvisaurus: Profile of a Prehistoric Giant Silvisaurus Silvisaurus (SIL-vih-SAWR-us; “Forest lizard”) is a genus of nodosaurid ankylosaurian dinosaur that lived during the mid-Cretaceous period, from the late Albian to early Cenomanian stages, approximately 105 to 98 million years ago. Its fossils were discovered in the Dakota Formation in Kansas, North America. The name Silvisaurus, given

“`html Similicaudipteryx Similicaudipteryx (sih-MILL-ih-cawd-IP-teh-ricks; “Similar to Caudipteryx”) is a genus of oviraptorosaurian theropod dinosaur that lived during the Early Cretaceous period, approximately 124 to 120 million years ago. Fossils of Similicaudipteryx have been discovered in the Yixian and Jiufotang Formations in Liaoning Province, China. The name reflects its resemblance to another feathered dinosaur, Caudipteryx. Similicaudipteryx

“`html Sinocalliopteryx: Profile of a Prehistoric Giant Sinocalliopteryx Sinocalliopteryx (SI-no-cal-ee-OP-ter-ix; “Chinese beautiful feather”) is a genus of compsognathid theropod dinosaur that lived during the Early Cretaceous period, about 125 to 122 million years ago. Its fossils were discovered in the Yixian Formation of Liaoning Province, China. The name Sinocalliopteryx highlights its Chinese origin and the

“`html Sinoceratops: Profile of a Prehistoric Giant Sinoceratops Sinoceratops (SIGH-no-SEHR-uh-tops; “Chinese horned face”) is a genus of centrosaurine ceratopsid dinosaur that lived during the Late Cretaceous period, approximately 73.5 million years ago (Campanian stage), in what is now Shandong Province, China. The name means “Chinese horned face,” referring to its country of discovery and the

“`html Sinocoelurus: Profile of a Mysterious Chinese Theropod Sinocoelurus Sinocoelurus (SY-no-see-LU-rus; “Chinese hollow tail”) is a genus of coelurosaurian theropod dinosaur that is believed to have lived during the Late Jurassic period, approximately 160 to 155 million years ago, in what is now Sichuan Province, China. The name “Sinocoelurus” means “Chinese hollow tail,” reflecting its

“`html Sinopeltosaurus: Profile of a Prehistoric Giant Sinopeltosaurus Sinopeltosaurus (SIN-oh-PEL-toh-SAWR-us; “Gulf shield lizard”) is a genus of nodosaurid ankylosaur dinosaur that lived during the Late Cretaceous period, approximately 72 to 70 million years ago, in what is now southeastern France. The name Sinopeltosaurus comes from the Latin word “sinus,” meaning gulf (referring to the Gulf

Sinornithoides: Profile of a Bird-like Dinosaur Sinornithoides Sinornithoides (SIN-or-nith-OY-deez; “Chinese bird form”) is a genus of small, bird-like troodontid theropod dinosaur that lived during the Early Cretaceous period, approximately 113 million years ago, in what is now Inner Mongolia, China. The name reflects its close anatomical similarities to birds. Sinornithoides was first described in 1993