Omnisaura

Dinosaur genus

Anoplosaurus

Seeley 1879

Anoplosaurus is a dinosaur genus known from bones, found in rocks 100.5–93.9 million years old, in the United Kingdom.

Also calleden Anoplosaurus ("unarmored lizard")
mediummedium: Only Wikidata gives this; nothing contradicts it.
Confidence labels
How sure are we?2 high5 medium3 lowHow we rate confidence

Confidence labels are switched off. Facts with low confidence, or where sources disagree, still carry a small dot: tap it for the reason.

At a glance

Data as of 12 October 2026
100.5–93.9 Ma
Triassic
Jurassic
Cretaceous
252 million years ago20114366

The last non-bird dinosaurs died out 66 million years ago. That's as far from us as the end of this bar.

Named by
Seeley 1879
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Described in
H. G. Seeley (1879). On the Dinosauria of the Cambridge Greensand. Quarterly Journal of the Geological Society of London 35: 591–636. Read it
mediummedium: Only PBDB gives this; its author and year match the naming authority (Seeley 1879).
Sources

Given by: Paleobiology Database. The publication the Paleobiology Database gives as the authority for this genus name, usually the one that first named and described it.

Lived
Cenomanian, 100.5–93.9 million years ago
disputedlow: Sources disagree and an editor has not ruled yet.
Omnisaura calculation100.5–93.9 million years ago, from its dated fossil records
lowlow: Omnisaura's calculation from only 1 dated record(s).
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Fossils found in
United Kingdom
highhigh: NHM and PBDB both record it.
Sources

Given by: Paleobiology Database; Natural History Museum Data Portal. How it was chosen: Union of all sources (ISO 3166).

Rock formations
Upper Greensand Formation
lowlow: Only one PBDB record.
Sources

Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.

Family
Nodosauridae
highhigh: PBDB and NHM agree.
Sources

Given by: Paleobiology Database; Natural History Museum Data Portal. How it was chosen: PBDB leads.

Parent group
Nodosauridae
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Order
Ornithischia
mediummedium: Only NHM gives this; nothing contradicts it.
Sources

Given by: Natural History Museum Data Portal. How it was chosen: Gap filled from NHM.

Known from
Bones
Sources

Given by: Paleobiology Database (what the name was based on).

Sources: Paleobiology Database (CC BY 4.0), Natural History Museum Data Portal (CC0 1.0), Wikidata (CC0 1.0)Confidence levels and gaps are Omnisaura's own assessment.

Gaps are answers

What isn't known yet

  • Type species: no source we use gives it yet.
  • What it was named after: no source we use gives it yet.
  • Resting on one source: 4 facts come from a single source with nothing against them (rated medium): authority (PBDB); parent group (PBDB); order (NHM); common names (Wikidata).

Size, diet and behaviour aren't covered yet. Omnisaura leaves them out rather than guess.

Where sources disagree

1 open

Age

  • 100.5–93.9 MaPBDB
  • 113.2–100.5 MaNHM specimens

The ages of the records reach well beyond the published range. An editor hasn't ruled yet, so this is rated low until they do.

Did it meet…?

?

No. Anoplosaurus had gone at least 10.3 million years before Tyrannosaurus appears in the fossil record.

Going by the ages and rock formations of their dated fossils, as on the map. Compare their fossil sites on the map.

Lived alongside

Genera found in the same rock formations, from rocks of the same age.

None in Omnisaura yet.

Credits

Where this page comes from

  • Paleobiology DatabaseCC BY 4.0 · fossil records, ages, classification
  • Natural History Museum Data PortalCC0 1.0 · catalogued specimens
  • WikidataCC0 1.0 · names and identifiers
  • OmnisauraOmnisaura editorial · confidence levels and gaps
  • PaleoMAP PaleoCoastlines (Kocsis and Scotese 2021)CC BY 4.0 · ancient coastlines on the small map
  • Natural EarthPublic domain · today's coastlines

Pictures linked from this page are credited beside each one, with their own licences; the full list is in the JSON download.