Mamenchisaurus Mamenchisaurus sanjiangensis Dai et al. 2025
/məˌmʌntʃiˈsɔːrəs/
Late Jurassic (Oxfordian) · 161.5–154.8 Mya
Key Statistics
Diet
herbivore
Locomotion
quadrupedal
inferred from clade
Overview
Mamenchisaurus sanjiangensis is a sauropodomorph dinosaur known from the Late Jurassic, roughly 161.5–154.8 million years ago. It was a herbivore. It was named by Dai et al. 2025. 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 Mamenchisaurus sanjiangensis sits in deep time
Mamenchisaurus
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Mamenchisaurus sanjiangensis's place in deep time — computed from overlapping age ranges, shared clades, and inferred ecology.