“`html Secernosaurus: Profile of a Prehistoric Giant Secernosaurus Secernosaurus (seh-SER-no-SAWR-us; “Separated Lizard”) is a genus of hadrosaurid ornithopod dinosaur that lived during the Late Cretaceous period, approximately 70 to 66 million years ago, in what is now South America. The name refers to its discovery on the southern supercontinent of Gondwana, separated from the majority […]
“`html Sefapanosaurus: Profile of a Prehistoric Giant Sefapanosaurus Sefapanosaurus (SEH-fah-PAH-noh-SAWR-us; “Cross lizard”) is a genus of sauropodomorph dinosaur that lived during the Early Jurassic period, approximately 200 million years ago, in what is now South Africa. The name Sefapanosaurus comes from the Sesotho word “sefapano,” meaning “cross,” which refers to a distinctive cross-shaped feature on
Segisaurus Segisaurus (SEJ-ih-SAWR-us; “Segi Canyon lizard”) is a genus of small coelophysoid theropod dinosaur that lived during the Early Jurassic period, about 183 million years ago. Its fossils were discovered in the Navajo Sandstone of Segi Canyon, Arizona, in the United States. Segisaurus was named and described by paleontologist Charles Lewis Camp in 1936 based
“`html Segnosaurus Segnosaurus (SEG-no-SAWR-us; “slow lizard”) is a genus of therizinosaurid theropod dinosaur that lived during the Late Cretaceous period, approximately 98 to 89.8 million years ago, in what is now Mongolia. The name Segnosaurus comes from the Greek words “segnos,” meaning slow or tardy, and “sauros,” meaning lizard, likely referring to its heavy build.
“`html Seismosaurus Seismosaurus (SIZE-mo-SAWR-us; “Earthquake lizard”) is the name first given to a type of very long plant-eating dinosaur called a sauropod. It lived during the Late Jurassic period, about 155 to 145 million years ago, in what is now New Mexico, in the United States. When its bones were first studied in 1991, scientists
Seitaad: Profile of a Prehistoric Giant Seitaad Seitaad (SAY-ih-tawd; “Sand Monster”) is a genus of basal sauropodomorph dinosaur that lived during the Early Jurassic period, approximately 184 million years ago, in what is now Utah, USA. The name Seitaad comes from a sand monster in Navajo mythology, reflecting how the fossil was found buried in
“`html Selimissus Selimissus (SEH-lee-MISS-us; “Seli’s lizard”) is a genus of ornithopod dinosaur believed to have lived during the Late Cretaceous period, approximately 75 to 70 million years ago. Fossil remains attributed to Selimissus have been discovered in geological formations suggesting it inhabited what is now western North America. The name “Selimissus” is thought to be
Sellosaurus: Profile of a Prehistoric Giant Sellosaurus Sellosaurus (SELL-oh-SAWR-us; “Saddle lizard”) is a genus of basal sauropodomorph dinosaur that lived during the Late Triassic period, around 215 to 210 million years ago, in what is now Germany. The name refers to a saddle-shaped depression observed on some of its vertebrae. Sellosaurus was first named by
“`html Serendipaceratops: Profile of a Prehistoric Giant Serendipaceratops Serendipaceratops (seh-ren-DIP-ah-SEH-rah-tops; “Serendipitous horned face”) is a genus of herbivorous dinosaur that lived during the Early Cretaceous period, about 115 to 110 million years ago, in what is now Victoria, Australia. The name highlights the lucky, or serendipitous, way its fossil was found and its initial, though
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“`html Serikornis: Profile of a Prehistoric Feathered Dinosaur Serikornis Serikornis (SEH-rih-KORN-iss; “Silk Bird”) is a genus of small, feathered anchiornithid theropod dinosaur that lived during the Late Jurassic period, about 160 million years ago. Its fossils were discovered in the Tiaojishan Formation in Liaoning Province, China, an area famous for its exceptionally preserved fossils. The
