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Footprint type

Eosauropus

Lockley et al. 2006

Eosauropus is a footprint type: the name is for the fossil footprints themselves. The animal that made them is not known for certain. Its footprints are found in rocks 237–201.4 million years old in the United States and the United Kingdom.

Confidence labels
How sure are we?0 high9 medium5 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
237–201.4 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
Lockley et al. 2006
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

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

Described in
M. G. Lockley, S. G. Lucas, A. P. Hunt (2006). Eosauropus, a new name for a Late Triassic track: further observations on the Late Triassic ichnogenus Tetrasauropus and related forms, with notes on the limits of interpretation. The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37: 192–198.
mediummedium: Only PBDB gives this; its author and year match the naming authority (Lockley et al. 2006).
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
Eosauropus cimarronensis
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

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

Dated to
Carnian to Rhaetian, 237–201.4 million years ago
mediummedium: Only PBDB gives this; nothing contradicts it.
Omnisaura calculation237–201.4 million years ago, from its dated fossil records
mediummedium: Omnisaura's calculation from 16 confirmed PBDB records.
Sources

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

Found in
United States
mediummedium: Only PBDB records it (13 records).
United Kingdom
lowlow: Only one PBDB record.
mixedmixed: Levels differ between entries; each has its own.
Sources

Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).

Rock formations
Sloan Canyon
mediummedium: Only PBDB records it (2 records).
Wingate Sandstone
mediummedium: Only PBDB records it (8 records).
Chinle
lowlow: Only one PBDB record.
Fleming Fjord
lowlow: Only one PBDB record.
Montemarcello
lowlow: Only one PBDB record.
Popo Agie
lowlow: Only one PBDB record.
mixedmixed: Levels differ between entries; each has its own.
Sources

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

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

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

Known from
Footprints and traces
Sources

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

Made by
Not known for certain. Footprints rarely show which animal made them.
Sources: Paleobiology Database (CC BY 4.0)Confidence levels and gaps are Omnisaura's own assessment.

Gaps are answers

What isn't known yet

  • The animal that made them: not known for certain, as for most footprint types.
  • Order: no source we use gives it yet.
  • Family: 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.
  • Held back: 4 fossil records left out: identified only tentatively (for example "cf." or "?").
  • Resting on one source: 5 facts come from a single source with nothing against them (rated medium): name (PBDB); authority (PBDB); type species (PBDB); parent group (PBDB); age (headline) (PBDB).

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…?

?

No. Eosauropus had gone at least 117.8 million years before Tyrannosaurus appears in the fossil record, a longer gap than the 66 million years between Tyrannosaurus and today.

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

Found in the same rocks

Genera and other fossil types from the same formations, from rocks of the same age.

GrallatorCoelophysisEvazoumAnomoepusChindesaurusEubrontesKrzyzanowskisaurusKwanasaurusAnchisauripusBarrancapusCamposaurusCoelurosaurichnusEucoelophysisPseudotetrasauropusTawa

Same parent group

Other genera in Sauropodomorpha with a full profile.

AhvaytumArcusaurusAsylosaurusBuriolestesEfraasiaEoraptorMbiresaurusThecodontosaurus

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