The Hadrosaur Edmontosaurus from the Upper Cretaceous of Alberta (1920) is a report written by paleontologist Lawrence M. Lambe (1863–1919) for the Geological Survey of Canada. In this report, Lambe describes the dinosaur Edmontosaurus, first found in Wyoming in 1892 by Othniel C. Marsh and at the time named Claosaurus. Lambe is credited with naming the genus Edmontosaurus (named after Edmonton) and with the first description of its type species, Edmontosaurus regalis. Found in 1912 and 1916 near Red Deer River in Alberta, the first specimens of the type species were discovered and prepared by the Sternberg brothers, Levi, George F. and Charles M. In this report, Lambe provides a detailed description of the skulls of the type specimens.
Later in the account, Lambe also proposes dividing the family Hadrosauridae into three subfamilies: Hadrosaurinae, Saurolophinae and Stephanosaurinae. To do this, Lambe provides comparative descriptions of the fossils of each proposed subfamily. While cutting-edge at the time, the Hadrosaur family's taxonomy has since been revised (see Dinosaurs Found in Canada).
The text also includes various illustrations of hadrosaur fossils, drawn by Arthur Miles. An image of one of the report’s early illustrations is included below. The Canadian Encyclopedia includes this primary source as part of a partnership with the Canadian Research Knowledge Network's Canadiana collections. For the work in its entirety, please visit their website.
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Page 6 of Lawrence M. Lambe’s account on a hadrosaur, Edmontosaurus, for the Geological Survey of Canada.
(by Lawrence M. Lambe, courtesy Canadiana)