10 Facts About Hypacrosaurus

Hypacrosaurus was a genus of duckbill dinosaur similar in appearance to Corythosaurus.

Type remains of Hypacrosaurus were collected in 1910 by Barnum Brown for the American Museum of Natural History.

The first of these that figure into the history of Hypacrosaurus was Cheneosaurus tolmanensis, based on a skull and assorted limb bones, vertebrae, and pelvic bones from the Horseshoe Canyon Formation.

New species Hypacrosaurus stebingeri was named for a variety of remains, including hatchlings with associated eggs and nests, found near the top of the late Campanian Two Medicine Formation in Glacier County, Montana, and across the border in Alberta.

Hypacrosaurus is most easily distinguished from other hollow-crested duckbills by its tall neural spines and the form of its crest.

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Hypacrosaurus was a lambeosaurine hadrosaurid, and has been recognized as such since the description of its skull.

Ruben and others in 1996 concluded that respiratory turbinates were probably not present in Nanotyrannus, Ornithomimus or Hypacrosaurus based on CT scanning, thus there was no evidence that those animals were warm-blooded.

Oxygen-isotope ratios calculated for Hypacrosaurus suggesting that the ratios varied little, indicating that Hypacrosaurus was a homeotherm, and likely was endothermic.

Hypacrosaurus stebingeri laid roughly spherical eggs of 20 by 18.

Discovery of tooth marks in the fibula of a Hypacrosaurus specimen inflicted by a bite from the teeth of a tyrannosaurid indicated that this, and other hadrosaurids were either preyed upon or scavenged by large theropod dinosaurs during the Late Cretaceous period.