Hesperonychus: Profile of a Tiny Prehistoric Hunter Hesperonychus Hesperonychus (HES-peh-ron-IH-kus; “Western claw”) is a genus of very small microraptorine dromaeosaurid theropod dinosaur that lived during the Late Cretaceous period, approximately 76.5 million years ago. Its fossils were discovered in what is now Dinosaur Provincial Park in Alberta, Canada. The dinosaur was named and described by […]
Hesperornithoides Hesperornithoides (HES-per-or-nith-OY-deez; “western bird-like”) is a genus of small, feathered theropod dinosaur that lived during the Late Jurassic period, approximately 150 million years ago. Its fossils were discovered in the Morrison Formation in Wyoming, USA. The name refers to its discovery in western North America and its many bird-like features. Hesperornithoides was officially named
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Hesperosaurus: Profile of a Prehistoric Giant Hesperosaurus Hesperosaurus (HESS-per-oh-SAWR-us; “Western Lizard”) Hesperosaurus is a genus of stegosaurid dinosaur that roamed North America during the Late Jurassic period, approximately 156 to 148 million years ago. Its fossils were discovered in the Morrison Formation, mainly in Wyoming, USA. The name Hesperosaurus means “western lizard,” referring to its
Heterodontosaurus Heterodontosaurus (HET-er-oh-DONT-oh-SAWR-us; “different-toothed lizard”) is a genus of small ornithischian dinosaur that lived during the Early Jurassic period, about 200 to 190 million years ago. Its fossils have been found in what is now South Africa. The name Heterodontosaurus refers to its most unusual feature: it had three different kinds of teeth in its
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Heterosaurus: Profile of a Prehistoric Giant Heterosaurus Heterosaurus (HET-er-oh-SAWR-us; “Different Lizard”) Heterosaurus is a genus of ornithopod dinosaur whose validity is considered doubtful. It lived during the Early Cretaceous period, approximately 140 to 130 million years ago, in what is now France. The original fossils, named Heterosaurus neocomiensis by French geologist M. Cornuel in 1850,
Heyuannia: Profile of a Prehistoric Giant Heyuannia Heyuannia (heh-YOO-ahn-NEE-ah; “from Heyuan”) is a genus of oviraptorid theropod dinosaur that lived during the Late Cretaceous period, around 72 to 66 million years ago. Its fossils were discovered in what is now Guangdong Province, China. The name Heyuannia refers to the city of Heyuan, near where the
Hierosaurus Hierosaurus (Hee-AIR-oh-SAWR-us; “Sacred lizard”) is a genus of nodosaurid ankylosaur dinosaur that lived during the Late Cretaceous period, specifically the Campanian stage, about 83 to 72 million years ago. Its fossils have been found in what is now Kansas, North America. The name “Hierosaurus” means “sacred lizard,” and it was given by paleontologist George
Hippodraco: Profile of a Prehistoric Giant Hippodraco Hippodraco (HIP-oh-DRAY-koh; “Horse Dragon”) Hippodraco is a genus of iguanodontian ornithopod dinosaur that lived during the Early Cretaceous period, approximately 124 million years ago. Its fossils were discovered in the Cedar Mountain Formation of Utah, USA. The name Hippodraco comes from the Greek word “hippos” meaning “horse” and
Histriasaurus Histriasaurus (HISS-tree-uh-SAWR-us; “Istria lizard”) is a genus of rebbachisaurid sauropod dinosaur that lived during the Early Cretaceous period, approximately 130 to 125 million years ago. Its fossils were discovered on the Istrian Peninsula in Croatia, which gives the dinosaur its name. Histriasaurus was first scientifically described by paleontologist Fabio Marco Dalla Vecchia in 1998
Homalocephale: Profile of the Flat-Headed Dinosaur Homalocephale Homalocephale (ho-MAH-lo-SEF-ah-lee; “even head” or “flat head”) is a genus of pachycephalosaurid dinosaur that lived during the Late Cretaceous period, about 70 million years ago. Fossils of Homalocephale have been discovered in what is now Mongolia. The name refers to its most distinctive feature: a broad, flat, and
