Hypacrosaurus

Hypacrosaurus
Temporal range: Late Cretaceous,
~75–67 Ma
H. altispinus fossil at the Royal Tyrrell Museum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Ornithischia
Clade: Neornithischia
Clade: Ornithopoda
Family: Hadrosauridae
Subfamily: Lambeosaurinae
Tribe: Lambeosaurini
Genus: Hypacrosaurus
Brown, 1913
Type species
Hypacrosaurus altispinus
Brown, 1913
Other species
Synonyms

Hypacrosaurus (meaning "near the highest lizard" [Greek υπο-, hypo- = less + ακρος, akros, high], because it was almost but not quite as large as Tyrannosaurus)[1][2] was a genus of duckbill dinosaur similar in appearance to Corythosaurus. Like Corythosaurus, it had a tall, hollow rounded crest, although not as large and straight. It is known from the remains of two species that spanned 75 to 67 million years ago,[3] in the Late Cretaceous of Alberta, Canada, and Montana, United States, and is the latest hollow-crested duckbill known from good remains in North America. It was an obscure genus until the discovery in the 1990s of nests, eggs, and hatchlings belonging to H. stebingeri.

  1. ^ Brown, Barnum (1913). "A new trachodont dinosaur, Hypacrosaurus, from the Edmonton Cretaceous of Alberta". Bulletin of the American Museum of Natural History. 32 (20): 395–406. hdl:2246/1416. Retrieved 2007-05-02.
  2. ^ Creisler, Benjamin S. (2007). "Deciphering duckbills". In Carpenter Kenneth (ed.). Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs. Bloomington and Indianapolis: Indiana University Press. pp. 185–210. ISBN 978-0-253-34817-3.
  3. ^ Arbour, V.M.; Burns, M. E.; Sissons, R. L. (2009). "A redescription of the ankylosaurid dinosaur Dyoplosaurus acutosquameus Parks, 1924 (Ornithischia: Ankylosauria) and a revision of the genus". Journal of Vertebrate Paleontology. 29 (4): 1117–1135. Bibcode:2009JVPal..29.1117A. doi:10.1671/039.029.0405. S2CID 85665879.