Dinosaur genus

Richardoestesia

Currie et al. 1990

Richardoestesia is a dinosaur genus known from bones, found in rocks 100.5–66 million years old, in 5 countries, most often Canada and the United States.

Confidence labels

VisibleOn tapHidden

How sure are we?2 high28 medium7 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 11 October 2026

100.5–66 Ma

Triassic

Jurassic

Cretaceous

252 million years ago20114366

Solid: the ages of its dated fossils, 100.5–66 million years ago (Omnisaura's calculation). Pale: the published range, 154.8–66 million years ago, which also counts records Omnisaura leaves out.

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: Currie et al. 1990
high
high: PBDB and Wikidata agree.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Described in: P. J. Currie, J. K. Rigby, Jr., R. E. Sloan (1990). Theropod teeth from the Judith River Formation of southern Alberta, Canada. In K. Carpenter and P. J. Currie (eds.), Dinosaur Systematics: Perspectives and Approaches. Cambridge University Press, Cambridge: 107–125. Read it
high
high: PBDB gives this publication for the name; its author and year match the naming authority (Currie et al. 1990), 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: Kimmeridgian to Maastrichtian, 154.8–66 million years ago
medium
medium: Only PBDB gives this; nothing contradicts it.
Omnisaura calculation100.5–66 million years ago, from its dated fossil records
medium
medium: Omnisaura's calculation from 155 confirmed PBDB records.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Fossils found in: Canada
medium
medium: Only PBDB records it (72 records).
Romania
medium
medium: Only PBDB records it (4 records).
Russia
medium
medium: Only PBDB records it (3 records).
United States
medium
medium: Only PBDB records it (68 records).
Uzbekistan
medium
medium: Only PBDB records it (9 records).
Sources
Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).
Rock formations: 23, including Dinosaur Park, Hell Creek Formation, Oldman and Lance Formation
mixed
mixed: Levels differ between entries; each has its own.
Show all 23, each with its confidence
Aguja
medium
medium: Only PBDB records it (9 records).
Bissekty
medium
medium: Only PBDB records it (7 records).
Cedar Mountain
medium
medium: Only PBDB records it (3 records).
Densuș-Ciula
medium
medium: Only PBDB records it (2 records).
Dinosaur Park
medium
medium: Only PBDB records it (30 records).
Ferris
medium
medium: Only PBDB records it (5 records).
Foremost
medium
medium: Only PBDB records it (2 records).
Hell Creek Formation
medium
medium: Only PBDB records it (36 records).
Horseshoe Canyon
medium
medium: Only PBDB records it (2 records).
Iron Springs
medium
medium: Only PBDB records it (2 records).
Judith River Formation
medium
medium: Only PBDB records it (4 records).
Khodzhakul
medium
medium: Only PBDB records it (2 records).
Lance Formation
medium
medium: Only PBDB records it (6 records).
Mesaverde
medium
medium: Only PBDB records it (2 records).
Milk River
medium
medium: Only PBDB records it (18 records).
Oldman
medium
medium: Only PBDB records it (18 records).
Udurchukan
medium
medium: Only PBDB records it (2 records).
Murtoi
low
low: Only one PBDB record.
Pui Beds
low
low: Only one PBDB record.
Râul Mare
low
low: Only one PBDB record.
Scollard
low
low: Only one PBDB record.
Two Medicine
low
low: Only one PBDB record.
Wapiti
low
low: Only one PBDB record.
Sources
Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.
Family: Dromaeosauridae
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Parent group: Dromaeosauridae
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Named after: Richard Estes
medium
medium: Only Wikidata gives this; nothing contradicts it.
Sources
Given by: Wikidata. How it was chosen: Wikidata leads.
Species named in its records: Richardoestesia asiatica, Richardoestesia gilmorei, Richardoestesia isosceles
Sources
Given by: Paleobiology Database (the species its fossil records are identified as).
Older or other names: Asiamericana (a junior synonym)
Sources
Given by: Paleobiology Database (names it treats as this genus).
Diet: carnivore (inferred for its group)
medium
medium: Only PBDB gives this, and it infers it for the whole of Dromaeosauridae, the group this genus belongs to, not from this genus's own fossils.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB, inferred from a group the genus belongs to.
Way of life: ground dwelling (inferred for its group)
low
low: PBDB infers this way of life for the whole of Dromaeosauridae; behaviour is rarely known for one genus.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB, inferred from a group the genus belongs to.
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.
Order: no source we use gives it yet.
Common names: no source we use gives it yet.
Held back: 82 fossil records left out: identified only tentatively (for example "cf.", "?" or the name in quotation marks).
Held back: 1 fossil record left out: identified as a related genus rather than this one.
Resting on one source: 5 facts come from a single source with nothing against them (rated medium): parent group (PBDB); family (PBDB); age (headline) (PBDB); named after (Wikidata); diet (PBDB).

Size and appearance aren't covered yet, and diet and way of life only as PBDB infers them for the wider group. Omnisaura leaves the rest out rather than guess.

Where sources disagree

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

Did it meet…?

Did Richardoestesia meet ?

Yes. Both are found, identified to species, in the same rocks of the same age: Dinosaur Park, Hell Creek, Scollard.

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

Connections

Genera linked to Richardoestesia by where and when their fossils were found, by classification and by who named them. Select a name to open its page.

Same rocks, same time 126

Genera found in the same rock units, from rocks of overlapping age, the most shared fossil sites first.

Triceratops Saurornitholestes Paronychodon Troodon Edmontosaurus Tyrannosaurus Centrosaurus Thescelosaurus Dromaeosaurus Pachycephalosaurus Corythosaurus Stegoceras Chirostenotes Albertosaurus Chasmosaurus Ornithomimusand 110 more

Same family: Dromaeosauridae 30

Other genera in Dromaeosauridae with a full profile.

Acheroraptor Achillobator Adasaurus Atrociraptor Austroraptor Balaur Bambiraptor Boreonykus Buitreraptor Changyuraptor Dakotaraptor Deinonychus Dromaeosaurus Hesperonychus Itemirus Microraptorand 14 more

Named by Currie 10

Genera whose naming authority includes the same surname. The authority has no initials, so different people who share a surname can appear together.

Albertonykus Apatoraptor Atrociraptor Boreonykus Caenagnathasia Crichtonpelta Fukuiraptor Hesperonychus Latenivenatrix Sinraptor

Found in Canada 80

Other genera found in Canada, from rocks of overlapping age, the most fossil sites there first.

Saurornitholestes Troodon Centrosaurus Paronychodon Dromaeosaurus Corythosaurus Chasmosaurus Albertosaurus Edmontosaurus Lambeosaurus Stegoceras Anodontosaurus Hypacrosaurus Gorgosaurus Triceratops Euoplocephalusand 64 more

Where its fossils were found

92 fossil sites, with present-day and ancient positions

Open the map at this time

Cite this page

Omnisaura (2026). Richardoestesia. Future Sailors. https://www.omnisaura.com/genera/richardoestesia. Data as of 11 October 2026.

What's changed

No changes since the change log started (11 Oct 2026).

Every change to Omnisaura

Use this data

Download this genus as JSON With every source and licence attached. Also recorded in: Paleobiology Database · Wikipedia (English) · GBIF · Wikidata Spotted a problem? Tell us

Pictures

1 openly licensed picture of Richardoestesia on Wikimedia Commons and museum sites, each with its own author and licence.

Richardoestesia.png
Derek W. Larson, Philip J. Currie, CC BY 2.5

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.