Footprint type

Hadrosauropodus

Lockley et al. 2003

Hadrosauropodus 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 121.4–66 million years old in 5 countries, most often the United States and Spain.

Confidence labels

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How sure are we?0 high14 medium12 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

121.4–66 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: Lockley et al. 2003
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Described in: M. G. Lockley, G. Nadon, P. J. Currie (2003). A diverse dinosaur-bird footprint assemblage from the Lance Formation, Upper Cretaceous, eastern Wyoming; implications for ichnotaxonomy. Ichnos 11: 229–249. Read it
medium
medium: Only PBDB gives this; its author and year match the naming authority (Lockley et al. 2003).
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.
Dated to: no earlier than 121.4 million years ago
medium
medium: Only PBDB gives this; nothing contradicts it.
Omnisaura calculation121.4–66 million years ago, from its dated fossil records
medium
medium: Omnisaura's calculation from 58 confirmed PBDB records.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Found in: Canada
medium
medium: Only PBDB records it (6 records).
China
medium
medium: Only PBDB records it (2 records).
Spain
medium
medium: Only PBDB records it (28 records).
United States
medium
medium: Only PBDB records it (21 records).
Argentina
low
low: Only one PBDB record.
mixed
mixed: 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: 15, including Conques, Muddy Sandstone, Mesa Rica Sandstone and Wapiti
mixed
mixed: Levels differ between entries; each has its own.
Show all 15, each with its confidence
Conques
medium
medium: Only PBDB records it (25 records).
Mesa Rica Sandstone
medium
medium: Only PBDB records it (5 records).
Muddy Sandstone
medium
medium: Only PBDB records it (11 records).
Wapiti
medium
medium: Only PBDB records it (5 records).
Chignik
low
low: Only one PBDB record.
La Posa
low
low: Only one PBDB record.
Lance Formation
low
low: Only one PBDB record.
Laramie Formation
low
low: Only one PBDB record.
Lower Red Garumnian
low
low: Only one PBDB record.
Menefee
low
low: Only one PBDB record.
Patuxent
low
low: Only one PBDB record.
Shaxian
low
low: Only one PBDB record.
St. Mary River
low
low: Only one PBDB record.
Yacoraite
low
low: Only one PBDB record.
Zhutian
low
low: Only one PBDB record.
Sources
Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.
Footprint family: Iguanodontipodidae
medium
medium: Only PBDB gives this; nothing contradicts it.
Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
Parent group: Iguanodontipodidae
medium
medium: 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), Natural History Museum Data Portal (CC0 1.0)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.
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.
What it was named after: no source we use gives it yet.
Held back: 3 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); parent group (PBDB); family (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…?

Did Hadrosauropodus meet ?

Possibly. Both are recorded from the same rocks of the same age (Lance), but there one of them is identified only to genus (for example from an isolated tooth).

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.

Triceratops Edmontosaurus Megaloolithus Fusioolithus Magnoavipes Prismatoolithus Thescelosaurus Pachycephalosaurus Paronychodon Tyrannosaurus Ornithomimus Pachyrhinosaurus Richardoestesia Troodon Amblydactylus Pararhabdodonand 37 more

Same family

Other genera in Iguanodontipodidae with a full profile.

Amblydactylus Caririchnium Iguanodontipus

Credits

Where this page comes from

Paleobiology DatabaseCC BY 4.0 · fossil records, ages, classification
Natural History Museum Data PortalCC0 1.0 · catalogued specimens
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