Dinosauria › Ornithischia
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Claosaurus

Claosaurus agilis (Marsh 1872)

Late Cretaceous (Santonian) · 89.8–83.6 Mya
Key Statistics
Diet
herbivore
Locomotion
bipedal
inferred from clade
Overview

Claosaurus agilis is an ornithopod dinosaur known from the Late Cretaceous, roughly 89.8–83.6 million years ago. It was a herbivore. It was named by (Marsh 1872). The species is represented by 1 recorded occurrence in the Paleobiology Database.

Fossil Record Completeness

How much of this profile is grounded in the fossil record

~5%
fragmentary record
Confirmed
Inferred
Based on 1 recorded occurrences in the Paleobiology Database.
Geologic Time

Where Claosaurus sits in deep time

TRIASSIC
JURASSIC
CRETACEOUS
Claosaurus
252 Mya201 Mya145 Mya66 Mya
Relationships

Part of a wider fossil web

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

predator–prey
Parahesperornis
Parahesperornis alexi
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predator–prey
Baptornis
Baptornis advenus
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predator–prey
Neuquenornis
Neuquenornis volans
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coexisted–with
Segnosaurus
Segnosaurus galbinensis
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coexisted–with
Notocolossus
Notocolossus gonzalezparejasi
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coexisted–with
Niobrarasaurus
Niobrarasaurus coleii
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same–clade
Craspedodon
Craspedodon lonzeensis
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same–clade
Kazaklambia
Kazaklambia convincens
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