Dinosauria › Reptilia
Allosaurus
Allosaurus fragilis (Marsh 1877)
Late Jurassic (Tithonian) · 154.8–143.1 Mya
Key Statistics
Diet
carnivore
Locomotion
bipedal
inferred from clade
Overview
Allosaurus fragilis is a theropod dinosaur known from the Late Jurassic, roughly 154.8–143.1 million years ago. It was a carnivore. It was named by (Marsh 1877). The species is represented by 29 recorded occurrences in the Paleobiology Database.
Fossil Record Completeness
How much of this profile is grounded in the fossil record
~69%
confidence from occurrence count
Confirmed
Inferred
Based on 29 recorded occurrences in the Paleobiology Database.
Geologic Time
Where Allosaurus sits in deep time
Allosaurus
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Allosaurus's place in deep time — computed from overlapping age ranges, shared clades, and inferred ecology.