Sinornithosaurus Sinornithosaurus millenii Xu et al. 1999
/sˌɪnɔːɹnˌɪθəsˈɔːɹəs/
estimated
Early Cretaceous (Aptian) · 125.8–119.6 Mya
Key Statistics
Diet
carnivore
Locomotion
bipedal
inferred from clade
Overview
Sinornithosaurus millenii is a theropod dinosaur known from the Early Cretaceous, roughly 125.8–119.6 million years ago. It was a carnivore. It was named by Xu et al. 1999. The species is represented by 2 recorded occurrences in the Paleobiology Database.
Fossil Record Completeness
How much of this profile is grounded in the fossil record
~8%
fragmentary record
Confirmed
Inferred
Based on 2 recorded occurrences in the Paleobiology Database.
Geologic Time
Where Sinornithosaurus millenii sits in deep time
Sinornithosaurus
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Sinornithosaurus millenii's place in deep time — computed from overlapping age ranges, shared clades, and inferred ecology.