Omnisaura
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Dinosaur genus

Psittacosaurus

Osborn 1923

Psittacosaurus is a dinosaur genus known from bones, found in rocks 161.5–66 million years old, in 4 countries, most often China and Mongolia.

Also calledja プシッタコサウルス
mediummedium: Only Wikidata gives this; nothing contradicts it.
Confidence labels
How sure are we?5 high18 medium9 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
161.5–66 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
Osborn 1923
highhigh: PBDB and Wikidata agree.
Sources

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

Described in
H. F. Osborn (1923). Two Lower Cretaceous dinosaurs of Mongolia. American Museum Novitates 95: 1–10.
highhigh: PBDB gives this publication for the name; its author and year match the naming authority (Osborn 1923), on which PBDB and Wikidata agree.
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
Valanginian to Albian, 137.1–100.5 million years ago
highhigh: PBDB and NHM agree.
Omnisaura calculation161.5–66 million years ago, from its dated fossil records
mediummedium: Omnisaura's calculation from 66 confirmed PBDB records.
Sources

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

Fossils found in
China
highhigh: NHM and PBDB both record it.
Mongolia
mediummedium: Only PBDB records it (19 records).
Russia
mediummedium: Only PBDB records it (7 records).
Thailand
mediummedium: Only PBDB records it (2 records).
mixedmixed: Levels differ between entries; each has its own.
Sources

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

Rock formations
21, including Ilek, Yixian, Ejinhoro and Doushan
mixedmixed: Levels differ between entries; each has its own.
Show all 21, each with its confidence
Doushan
highhigh: NHM and PBDB both record it.
Bayangobi
mediummedium: Only PBDB records it (2 records).
Ejinhoro
mediummedium: Only PBDB records it (6 records).
Ilek
mediummedium: Only PBDB records it (7 records).
Jiufotang
mediummedium: Only PBDB records it (4 records).
Khok Kruat
mediummedium: Only PBDB records it (2 records).
Khuren Dukh
mediummedium: Only PBDB records it (3 records).
Lisangou
mediummedium: Only PBDB records it (2 records).
Tsagaantsav
mediummedium: Only PBDB records it (2 records).
Yixian
mediummedium: Only PBDB records it (11 records).
Zhonggou
mediummedium: Only PBDB records it (2 records).
Öösh
mediummedium: Only PBDB records it (7 records).
Andaikhudag
lowlow: Only one PBDB record.
Dushihin
lowlow: Only one PBDB record.
Dzunbain
lowlow: Only one PBDB record.
Döshuul
lowlow: Only one PBDB record.
Jingchuan
lowlow: Only one PBDB record.
Lianmuqin
lowlow: Only one PBDB record.
Luohandong
lowlow: Only one PBDB record.
Ulan Argalant
lowlow: Only one PBDB record.
Zhidan
lowlow: Only one PBDB record.
Sources

Given by: Paleobiology Database; Natural History Museum Data Portal. How it was chosen: Canonical names, automatic and editor-approved matches applied.

Parent group
Ceratopsia
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.
  • Family: no source we use gives it yet.
  • What it was named after: no source we use gives it yet.
  • Held back: 4 fossil records left out: identified only tentatively (for example "cf." or "?").
  • Resting on one source: 3 facts come from a single source with nothing against them (rated medium): 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

None open. Where our sources overlap, they agree on everything shown here.

Did it meet…?

?

Same time, different places. Their fossils overlap in age, 83.6 to 66 million years ago, but no rock formation holds both.

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.

MicroraptorSinovenatorSinornithosaurusSinosauropteryxWuerhosaurusArchaeoceratopsAuroraceratopsBeipiaosaurusBolongCaudipteryxChoyrodonDilongEubrontesGrallatorLiaoceratopsShamosaurusand 21 more

Same parent group

Other genera in Ceratopsia with a full profile.

AjkaceratopsAlbalophosaurusFerenceratops

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.