Dinosauria › Ornithischia › Thescelosauridae
Silhouette of Thescelosaurus

Thescelosaurus

Thescelosaurus neglectus Gilmore 1913

Late Cretaceous (Maastrichtian) · 83.6–66 Mya
Key Statistics
Diet
herbivore
Locomotion
Unknown
Overview

Thescelosaurus neglectus is a dinosaur known from the Late Cretaceous, roughly 83.6–66.0 million years ago. It was a herbivore. It was named by Gilmore 1913. The species is represented by 28 recorded occurrences in the Paleobiology Database.

Fossil Record Completeness

How much of this profile is grounded in the fossil record

~67%
confidence from occurrence count
Confirmed
Inferred
Based on 28 recorded occurrences in the Paleobiology Database.
Geologic Time

Where Thescelosaurus sits in deep time

TRIASSIC
JURASSIC
CRETACEOUS
Thescelosaurus
252 Mya201 Mya145 Mya66 Mya
Relationships

Part of a wider fossil web

These species share Thescelosaurus's place in deep time — computed from overlapping age ranges, shared clades, and inferred ecology.

predator–prey
Saurornitholestes
Saurornitholestes langstoni
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predator–prey
Tyrannosaurus
Tyrannosaurus rex
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predator–prey
Richardoestesia
Richardoestesia isosceles
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coexisted–with
Richardoestesia
Richardoestesia gilmorei
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coexisted–with
Troodon
Troodon formosus
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same–clade
Orodromeus
Orodromeus makelai
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same–clade
Koreanosaurus
Koreanosaurus boseongensis
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same–clade
Albertadromeus
Albertadromeus syntarsus
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