Brontosaurus: Profile of a Prehistoric Giant Brontosaurus Brontosaurus (BRON-toh-SAWR-us; “Thunder lizard”) is a genus of giant sauropod dinosaur that lived during the Late Jurassic period, approximately 155 to 152 million years ago. Its fossils have been found in the Morrison Formation of North America. For many years, Brontosaurus was considered to be the same genus […]
Bruhathkayosaurus: Profile of a Prehistoric Giant Bruhathkayosaurus Bruhathkayosaurus (bru-HATH-kay-oh-SAWR-us; “huge-bodied lizard”) is a genus of dinosaur whose existence and size are highly debated by scientists. The fossils, found in India, were described as belonging to a giant sauropod dinosaur from the Late Cretaceous period, about 70 million years ago. However, the original bones were poorly
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Bugenasaura: Profile of a Late Cretaceous Herbivore Bugenasaura Bugenasaura (BOO-gen-uh-SAWR-uh; “Big-kneed Lizard”) is a genus of ornithopod dinosaur that lived during the Late Cretaceous period, approximately 68 to 66 million years ago, in what is now South Dakota, North America. The name was given by paleontologist Peter Galton in 1995, referring to the notably large
Buitreraptor: Profile of the Vulture Raider Buitreraptor Buitreraptor (BWEE-tree-RAP-tor; “Vulture Plunderer” or “La Buitrera Raider”) Buitreraptor is a genus of small, bird-like theropod dinosaur that belonged to the dromaeosaurid family, often called “raptors.” It lived approximately 99 to 97 million years ago, during the Late Cretaceous period, in what is now Patagonia, Argentina. The name
Byronosaurus: Profile of a Prehistoric Giant Byronosaurus (BYE-ron-oh-SAWR-us; “Byron’s lizard”) is a genus of troodontid theropod dinosaur that lived during the Late Cretaceous period, approximately 75 to 72 million years ago. Its fossils were discovered in the Gobi Desert of Mongolia. The name honors Byron Jaffe, a significant supporter of the paleontological expeditions that found
Caenagnathasia Caenagnathasia (SEE-nuhg-NATH-ay-zhuh; “Recent jaw from Asia”) is a genus of small oviraptorosaurian theropod dinosaur that lived during the Late Cretaceous period, approximately 90 million years ago (Turonian stage). Its fossils have been discovered in what is now Uzbekistan and possibly Tajikistan in Central Asia. The name reflects its relatively advanced jaw structure for its
Caenagnathus: Profile of a Prehistoric Giant Caenagnathus Caenagnathus (KEE-nag-NAY-thus; “Recent jaw”) is a genus of oviraptorosaurian theropod dinosaur that lived during the Late Cretaceous period, approximately 76 to 75 million years ago. Its fossils have been found in North America, mainly in the Dinosaur Park Formation of Alberta, Canada. The name Caenagnathus, given by paleontologist
Calamosaurus: Profile of a Prehistoric Giant Calamosaurus Calamosaurus (KAL-uh-moh-SAWR-us; “Reed Lizard”) is a genus of small theropod dinosaur that lived during the Early Cretaceous period, about 130 to 125 million years ago. Its fossils were discovered in the Wessex Formation on the Isle of Wight, England. The name comes from the Greek words “kalamos” (reed)
Calamospondylus: Profile of an Early Cretaceous Theropod Calamospondylus Calamospondylus (KAL-uh-mo-SPON-dih-luss; “Reed Vertebra”) is a genus of small theropod dinosaur that lived during the Early Cretaceous period, approximately 130 to 125 million years ago, in what is now England. The name refers to the hollow, reed-like nature of its vertebrae. Calamospondylus is known only from very
Callovosaurus: Profile of a Prehistoric Giant Callovosaurus Callovosaurus (KAL-oh-vo-SAWR-us; “Callovian lizard”) is a genus of ornithopod dinosaur that lived during the Middle Jurassic period, specifically the Callovian stage, about 166 to 163.5 million years ago. Its fossils were discovered in the Oxford Clay Formation in England. The name Callovosaurus refers to the geological age in
