Dinosaur genus

Gremlin

Ryan et al. 2023

Gremlin is a dinosaur genus known from bones, found in rocks 83.6–72.2 million years old, in Canada and the United States.

Confidence labels

VisibleOn tapHidden

How sure are we?0 high7 medium6 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

83.6–72.2 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: Ryan et al. 2023
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Described in: M. J. Ryan, L. Micucci, H. Rizo, C. Sullivan, Y.-N. Lee, D. C. Evans (2023). A new Late Cretaceous leptoceratopsid (Dinosauria: Ceratopsia) from the Oldman Formation (Campanian) of Alberta, Canada. Windows into Sauropsid and Synapsid Evolution: Essays in Honor of Prof. Louis L. Jacobs: 151–165.
medium
medium: Only PBDB gives this; its author and year match the naming authority (Ryan et al. 2023).
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.
Type species: Gremlin slobodorum
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Lived: Campanian, 83.6–72.2 million years ago
medium
medium: Only PBDB gives this; nothing contradicts it.
Omnisaura calculation83.6–72.2 million years ago, from its dated fossil records
low
low: Omnisaura's calculation from only 2 dated record(s).
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Fossils found in: Canada
low
low: Only one PBDB record.
United States
low
low: Only one PBDB record.
Sources
Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).
Rock formations: Oldman
low
low: Only one PBDB record.
Two Medicine
low
low: Only one PBDB record.
Sources
Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.
Family: Leptoceratopsidae
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Parent group: Leptoceratopsidae
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Species named in its records: Gremlin slobodorum
Sources
Given by: Paleobiology Database (the species its fossil records are identified as).
Diet: herbivore (inferred for its group)
medium
medium: Only PBDB gives this, and it infers it for the whole of Ceratopsia, 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 Ceratopsia; 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)Confidence levels and gaps are Omnisaura's own assessment.

Gaps are answers

What isn't known yet

Order: no source we use gives it yet.
Common names: no source we use gives it yet.
What it was named after: no source we use gives it yet.
Resting on one source: 7 facts come from a single source with nothing against them (rated medium): name (PBDB); authority (PBDB); type species (PBDB); parent group (PBDB); family (PBDB); age (headline) (PBDB); 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 Gremlin meet ?

Same time, different places. Their fossils overlap in age, 83.6 to 72.2 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.

Connections

Genera linked to Gremlin 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 52

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

Saurornitholestes Troodon Richardoestesia Paronychodon Daspletosaurus Dromaeosaurus Hypacrosaurus Spheroolithus Continuoolithus Prismatoolithus Stenonychosaurus Struthiomimus Brontotholus Centrosaurus Maiasaura Monocloniusand 36 more

Same family: Leptoceratopsidae 4

Other genera in Leptoceratopsidae with a full profile.

Cerasinops Leptoceratops Montanoceratops Prenoceratops

Named by Ryan 2

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

Albertaceratops Coronosaurus

Found in Canada 73

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

Saurornitholestes Richardoestesia Centrosaurus Troodon Paronychodon Dromaeosaurus Corythosaurus Chasmosaurus Lambeosaurus Stegoceras Gorgosaurus Prosaurolophus Stenonychosaurus Euoplocephalus Styracosaurus Daspletosaurusand 57 more

Credits

Where this page comes from

Paleobiology DatabaseCC BY 4.0 · fossil records, ages, classification
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