Edmontonia

Kabacchi · CC BY 2.0 · via Wikidata/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- NodosauridaePBDB
- Diet
- herbivorePBDB, for Ornithischia
- Life habit
- ground dwelling, gregariousPBDB, for Ornithischia
- Motility
- actively mobilePBDB, for Ornithischia
- Environment
- terrestrialPBDB, for Ornithischia
- Length
- 6.6 mWikidata
- Mass
- 3 tonneWikidata
Time the record covers
At most 18 million years on record.
Every occurrence read is dated to somewhere between 83.6 Mya and 66 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
16 occurrences of Edmontonia on record, most of them in the Late Cretaceous. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
16 occurrences- Late Cretaceous100%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
11 formations
- Aguja Formation3
- Judith River Formation · Montana Group2
- Hell Creek Formation · Montana Group2
- Denver Formation2
- St. Mary River Formation1
- Matanuska Formation1
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The named rock units Edmontonia has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Edmontonia and its relatives
Late CretaceousWhere Edmontonia and its relatives were recorded in the Late Cretaceous.
Found in the same rock
185 taxa- Hadrosauridae6 sites
- Ceratopsidae5 sites
- Baenidae4 sites
- Basilemys4 sites
- Champsosaurus4 sites
- Dromaeosauridae4 sites
- Lepisosteus4 sites
- Trionychidae4 sites
- Tyrannosauridae4 sites
- Adocus3 sites
- Albanerpetontidae3 sites
- Alphadon halleyi3 sites
- Aves3 sites
- Mesodma3 sites
- Pachycephalosaurus wyomingensis3 sites
- Paronychodon3 sites
- Saurornitholestinae3 sites
- Theropoda3 sites
- Troodon3 sites
- Amia2 sites
- Amia fragosa2 sites
- Anura2 sites
- Belonostomus longirostris2 sites
- Brachychampsa2 sites
The Paleobiology Database records 16 sites for Edmontonia, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
13 references- Faunal composition and significance of high-diversity, mixed bonebeds containing Agujaceratops mariscalensis and other dinosaurs, Aguja Formation (Upper Cretaceous), Big Bend, Texas2
- Fossil Vertebrate Collections2
- Late Cretaceous dinosaurs from the Denver Basin, Colorado2
- The paleontology, geology and taphonomy of the Tooth Draw Deposit; Hell Creek Formation (Maastrictian), Butte County, South Dakota1
- Dinosaurs of Alberta (exclusive of Aves)1
- Edmontonia sp., the first record of an ankylosaur from Alaska1
- Additions to the mammalian paleofauna of Saskatchewan1
- Ankylosaur systematics: example using Panoplosaurus and Edmontonia (Ankylosauria: Nodosauridae)1
- Review of the Late Cretaceous nodosaurid Dinosauria: Denversaurus schlessmani, a new armor-plated dinosaur from the latest Cretaceous of South Dakota, the last survivor of the nodosaurians, with comments on stegosaur-nodosaur relationships1
- Quarries of Dinosaur Provincial Park1
- The ceratopsian dinosaurs and associated lower vertebrates from the St. Mary River Formation (Maestrichtian) at Scabby Butte, southern Alberta1
- The vertebrate fauna of the Judith River Formation, Montana1
Each of the 16 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 1 further reference is not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content2

Picture of Edmontonia
- Source
- Wikidata/Commons
- Credit
- Kabacchi
- Licence
- CC BY 2.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial
- Commercial use
- the licence does not allow it
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itNodosauridae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Sternberg 1928