Acrocanthosaurus (/”AK-ro-KAN-tho-SAWR-us”/; “high-spined lizard”) is a genus of very large, meat-eating dinosaur. It belonged to a group called carcharodontosaurid theropods and lived during the Early Cretaceous period, approximately 113 to 110 million years ago. Fossils of Acrocanthosaurus have been discovered mainly in North America, in states like Oklahoma, Texas, and Wyoming. The name Acrocanthosaurus comes […]
Acrotholus (/”AK-roh-THO-luss”/; “highest dome”) is a genus of pachycephalosaurid dinosaur that lived during the Late Cretaceous period. Its fossils date to the Santonian stage, approximately 85.8 to 83.5 million years ago. These remains were discovered in the Milk River Formation of Alberta, Canada. The genus was scientifically described in 2013 by paleontologists David C. Evans,
Adamantisaurus (/”AD-uh-man-TEE-nuh-SORE-us”/; “Adamantina lizard”) is a genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous period, approximately 93 to 83 million years ago. Its fossils were discovered in the Adamantina Formation in São Paulo, Brazil. The name refers to this geological formation, known for its rich fossil deposits. Adamantisaurus was first found in
Adelolophus (/”uh-DELL-oh-LOAF-us”/; “unknown crest”) is a genus of lambeosaurine hadrosaurid dinosaur that lived during the Late Cretaceous period, approximately 80 to 77 million years ago. The name refers to the fact that while it is classified as a hollow-crested hadrosaur, the exact shape of its crest is unknown because only a part of its upper
Adeopapposaurus (/”AD-ee-oh-pap-oh-SAWR-us”/; “far-eating lizard”) is a genus of early sauropodomorph dinosaur that lived during the Early Jurassic period, approximately 200 to 190 million years ago. Its fossils were discovered in the San Juan Province of Argentina. The name refers to its long neck, which likely helped it reach high vegetation. Adeopapposaurus was first scientifically described
Aegyptosaurus (ee-JIPT-oh-SORE-us; “Egyptian lizard”) is a genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous period, approximately 95 million years ago (Cenomanian stage). Its fossils have been discovered in North Africa, primarily in Egypt and Niger. The name Aegyptosaurus refers to Egypt, the country where its first remains were found. German paleontologist Ernst
Aeolosaurus (/”EE-oh-lo-SAWR-us”/; “Aeolus’ lizard”) is a genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous period, approximately 83 to 70 million years ago (Campanian to Maastrichtian stages). Fossils of Aeolosaurus have been discovered in South America, primarily in Argentina and Brazil. The name “Aeolosaurus” refers to Aeolus, the Greek god of the winds,
Aepisaurus (/”EE-pee-SAWR-us”/; “lofty lizard” or “high lizard”) is a genus of sauropod dinosaur that lived during the Early Cretaceous period, approximately 100 to 105 million years ago, in what is now southern France. The genus was named and described by French paleontologist Paul Gervais in 1852 based on a single fossil bone. The name comes
Aerosteon (/”AIR-oh-STEE-on”/; “air bone”) is a genus of megaraptoran theropod dinosaur that lived during the Late Cretaceous period, specifically the Santonian stage, about 84 million years ago. Its fossils were discovered in the Anacleto Formation in Mendoza Province, Argentina. The name Aerosteon, meaning “air bone,” refers to the numerous air-filled spaces within its bones, a
Aetonyx (ay-ee-TOE-nix; “eagle claw”) is a name given to a type of saurischian dinosaur that lived during the Early Jurassic period, roughly 201 to 183 million years ago. Its fossils were discovered in what is now South Africa. The name Aetonyx comes from Greek words: “aetos” meaning “eagle” and “onyx” meaning “claw,” referring to a
