Eodromaeus: Profile of an Early Theropod Dinosaur Eodromaeus Eodromaeus (EE-oh-DROH-mee-us; “Dawn Runner”) Eodromaeus is a genus of early theropod dinosaur that lived during the Late Triassic period, about 231 million years ago. Its fossils were discovered in the Ischigualasto Formation in Argentina, South America, a place sometimes called the “Valley of the Moon.” The name […]
Eolambia: Profile of a Prehistoric Giant Eolambia Eolambia (EE-oh-LAM-bee-uh; “Dawn Lambeosaurine”) is a genus of herbivorous hadrosauroid dinosaur that lived during the Late Cretaceous period, approximately 98.5 million years ago. Its fossils were discovered in Utah, USA, in rocks of the Cedar Mountain Formation. The name “Eolambia” refers to its early appearance (“Eo” meaning dawn)
Eomamenchisaurus: Profile of a Prehistoric Giant Eomamenchisaurus Eomamenchisaurus (EE-oh-mah-men-kih-SAWR-us; “Dawn Mamenchisaurus”) is a genus of mamenchisaurid sauropod dinosaur that lived during the Middle Jurassic period, about 168 to 166 million years ago (Bathonian-Callovian stages), in what is now Anhui Province, China. The name Eomamenchisaurus reflects its status as an early relative of the well-known long-necked
Eoplophysis: Profile of a Prehistoric Predator Eoplophysis Eoplophysis (ee-oh-LOH-fih-sis; “dawn crested form”) is a genus of small, meat-eating dinosaur known as a coelophysoid theropod. It lived during the Late Triassic period, around 210 million years ago, in what is now New Mexico, USA. Eoplophysis was first named and described by paleontologists Hans-Dieter Sues, Sterling Nesbitt,
Eoraptor: Profile of a Prehistoric Giant Eoraptor Eoraptor (EE-oh-RAP-tor; “Dawn plunderer” or “Dawn thief”) is a genus of very early dinosaur that lived during the Late Triassic period, about 231 to 228 million years ago. Its fossils were first discovered in the Ischigualasto Formation of northwestern Argentina in 1991 by Ricardo Martinez. Eoraptor was formally
Eosinopteryx: Profile of a Prehistoric Giant Eosinopteryx Eosinopteryx (EE-oh-SIN-op-ter-iks; “dawn Chinese wing”) is a genus of small, feathered theropod dinosaur that lived during the Middle to Late Jurassic period, approximately 160 million years ago. Fossils of this dinosaur were discovered in the Tiaojishan Formation in Liaoning Province, China. Eosinopteryx is important for understanding the early
Eotrachodon Eotrachodon (EE-oh-TRACK-oh-don; “Dawn Rough Tooth”) is a genus of hadrosaurid, or duck-billed, dinosaur that lived during the Late Cretaceous period, about 80 million years ago. Its fossils were discovered in Alabama, in the United States. Scientists named Eotrachodon in 2016 based on a surprisingly complete skeleton, which has helped us learn a lot about
Eotriceratops: Profile of a Prehistoric Giant Eotriceratops Eotriceratops (EE-oh-try-SER-ah-tops; “Dawn three-horned face”) is a genus of large chasmosaurine ceratopsid dinosaur that lived during the Late Cretaceous period, specifically the late Maastrichtian stage, approximately 68 million years ago. Its fossils were discovered in the Horseshoe Canyon Formation in Alberta, Canada. The name, meaning “dawn three-horned face,”
Eotyrannus: Profile of a Prehistoric Giant Eotyrannus Eotyrannus (EE-oh-tie-RAN-us; “Dawn Tyrant”) is a genus of early tyrannosauroid theropod dinosaur that lived during the Early Cretaceous period, approximately 130 million years ago. Its fossils were discovered on the Isle of Wight, in England. The name “Eotyrannus” means “dawn tyrant,” reflecting its status as an early ancestor
Epachthosaurus Epachthosaurus (eh-PACK-thoh-SAWR-us; “Heavy lizard”) is a genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous period, approximately 95 to 89 million years ago. Its fossils were discovered in what is now Patagonia, Argentina, in South America. The name Epachthosaurus, meaning “heavy lizard,” was coined by paleontologist Jaime Powell in 1990 based on
