Edmontosaurus fossil map
Where fossils of Edmontosaurus have been found, shown on the Earth as it looked about 66 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 66 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Iguanodonts & duck-bills |
|---|---|
| Lived | 89.8–66 million years ago (Coniacian to Maastrichtian) |
| Periods | Cretaceous |
| Family | Hadrosauridae |
| Named by | Lambe 1917 |
| Fossil records | 85 occurrences at 78 locations (PBDB) |
| Found in | United States, Canada |
| Rock formations | Hell Creek, Lance, Horseshoe Canyon, txn:38755, Frenchman, Laramie |
About Edmontosaurus
Edmontosaurus ( ed-MON-tə-SOR-əs) (meaning "lizard from Edmonton"), often colloquially and historically known as Anatosaurus or Anatotitan (meaning "duck lizard" and "giant duck"), is a genus of hadrosaurid (duck-billed) dinosaur. It contains two known species: Edmontosaurus regalis and Edmontosaurus annectens. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian age of the Cretaceous period 73 million years ago, while those of E. annectens were found in the same geographic region from rocks dated to the end of the Maastrichtian age, 66 million years ago. Edmontosaurus was one of the last non-avian dinosaurs ever to exist, and lived alongside dinosaurs like Triceratops, Tyrannosaurus, Ankylosaurus, and Pachycephalosaurus shortly before the Cretaceous–Paleogene extinction event.
Text in “About” is quoted from the Wikipedia article Edmontosaurus (revision 1371934142), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 22 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q309466.
