Dinosaur
Edmontosaurus annectens
Duck-billed dinosaur
Edmontosaurus is the large, crestless hadrosaur of the Hell Creek and Lance formations and the most abundant articulated dinosaur in those beds. Its dental batteries shed diamond-shaped teeth with a single median ridge that are the cheapest Hell Creek dinosaur teeth; vertebrae, ribs, phalanges and chevrons are the usual bones in trade. Bonebed material is often iron-stained and river-tumbled.
| Phylum | Chordata |
|---|---|
| Class | Reptilia |
| Order | Ornithischia |
| Family | Hadrosauridae |
| Group | Dinosaur |
| Size | 12 m long |
| Rank (PBDB) | genus· Paleobiology Database |
| Author | Lambe 1917· Paleobiology Database |
| Classification (PBDB) | Chordata › Ornithischia › NO_ORDER_SPECIFIED › Hadrosauridae· Paleobiology Database |
| Range (PBDB) | 89.8–66 Ma· Paleobiology Database |
| PBDB occurrences | 85· Paleobiology Database |
Restoration and fakes
Bone from bonebeds is stabilised with cyanoacrylate and Paraloid; 'complete' limb bones are frequently assembled from several individuals.
Photographs
Elsewhere
Cite this article
Stratum Study. "Edmontosaurus annectens" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/edmontosaurus-annectens. Accessed 2026-09-20.
@misc{stratum-edmontosaurus-annectens,
title = {Edmontosaurus annectens},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/taxa/edmontosaurus-annectens}},
year = {2026},
note = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb, wikidata, commons, smithsonian, nhm. Accessed 2026-09-20.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.