Dinosauria › Reptilia › Theropoda › Dromaeosauridae
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Richardoestesia

Richardoestesia isosceles Sankey 2001

Late Cretaceous (Maastrichtian) · 100.5–66 Mya
Key Statistics
Diet
carnivore
Locomotion
bipedal
inferred from clade
Overview

Richardoestesia isosceles is a theropod dinosaur known from the Late Cretaceous, roughly 100.5–66.0 million years ago. It was a carnivore. It was named by Sankey 2001. The species is represented by 70 recorded occurrences in the Paleobiology Database.

Fossil Record Completeness

How much of this profile is grounded in the fossil record

~94%
confidence from occurrence count
Confirmed
Inferred
Based on 70 recorded occurrences in the Paleobiology Database.
Geologic Time

Where Richardoestesia sits in deep time

TRIASSIC
JURASSIC
CRETACEOUS
Richardoestesia
252 Mya201 Mya145 Mya66 Mya
Relationships

Part of a wider fossil web

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

predator–prey
Triceratops
Triceratops horridus
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predator–prey
Alamosaurus
Alamosaurus sanjuanensis
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predator–prey
Edmontosaurus
Edmontosaurus annectens
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coexisted–with
Thescelosaurus
Thescelosaurus neglectus
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coexisted–with
Pachycephalosaurus
Pachycephalosaurus wyomingensis
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same–clade
Hesperornis
Hesperornis gracilis
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same–clade
Hesperornis
Hesperornis crassipes
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same–clade
Pycnonemosaurus
Pycnonemosaurus nevesi
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