Mamenchisaurus
Named by Young 1954 · Mamenchisauridae · Sauropodomorphs
Lived 165.3–145 million years ago, in the Callovian to Tithonian stages of the Middle Jurassic to Late Jurassic.No other genus on this site shares a fossil collection with it. Below, in grey: genera that lived at the same time.
Top: the whole age of dinosaurs, 251.9–66 million years ago; the outlined part is enlarged below. Each bar spans the ICS stages its well-dated fossil records fall in.
Mamenchisaurus lived 165.3–145 million years ago, during the Callovian to Tithonian stages of the Middle Jurassic to Late Jurassic. The Paleobiology Database lists 23 fossil records for it from 3 countries (China, Mongolia and Thailand) — the 53rd most of the 99 genera on this site.
Its records are spread over at least 7 formations; the largest share, 39%, is from the Shaximiao Formation.
It is one of the more widespread genera here: records from 3 countries, 26th of 99.
Its stage range spans about 20.3 million years (the 7th longest of 99); it is the 10th best-recorded of the 19 sauropodomorphs here.
- Lived
- 165.3–145 Ma
- Stage
- Callovian–Tithonian
- Period
- Jurassic
- Group
- Sauropodomorphs
- Family
- Mamenchisauridae
- Fossil records
- 23 · #53 of 99
- Collections
- 22
- Countries
- 3
How it compares with the other 98
Each thin line is one genus on this site — darker where several share a value. The marked line is Mamenchisaurus.
Fossil records
23
53rd most of 99 genera
Countries with records
3
Shared with 9 other genera
Length of stage range
20.3 My
7th longest of 99 genera
Where its fossils were found
23 fossil records with coordinates, at present-day positions.
States and provinces
Countries
The rocks it comes from, and the company it kept
Share of its 23 fossil records by rock formation; then the genera most often dug up in the same collections.
- Shaximiao 9 · 39%
- Ulan Malgait 6 · 26%
- Xiangtang 2 · 9%
- Phu Kradung 2 · 9%
- Shishugou 1 · 4%
- Dariv 1 · 4%
- Other or unnamed formations 2 · 9%
No other genus on this site has been recorded in the same fossil collections as Mamenchisaurus.
8 accepted species
- Mamenchisaurus hochuanensisChao 1965 · 5 records
- Mamenchisaurus constructusYoung 1954 · 3 records
- Mamenchisaurus anyuensisHe et al. 1996 · 2 records
- Mamenchisaurus jingyanensisZhang et al. 1998 · 1 record
- Mamenchisaurus sanjiangensisDai et al. 2025 · 1 record
- Mamenchisaurus sinocanadorumRussell and Zheng 1994 · 1 record
- Mamenchisaurus youngiPi et al. 1996 · 1 record
- Mamenchisaurus gongjianensis · 0 records
Records by stage
Well-dated records, by the stage of their mid-point age
Other sauropodomorphs of its time
Same group, overlapping stage range, never found in the same collections. The amber band marks when Mamenchisaurus lived.
- Camarasaurus154.8–145 MaUnited States, Zimbabwe
- Apatosaurus154.8–145 MaUnited States
- Diplodocus154.8–145 MaUnited States
- Giraffatitan154.8–145 MaTanzania
- Cetiosaurus168.2–125.77 MaUnited Kingdom, Morocco
- Brontosaurus149.2–145 MaUnited States
- Brachiosaurus154.8–145 MaUnited States, Tanzania
- Barosaurus154.8–145 MaUnited States, Zimbabwe
Data: Paleobiology Database, taxon 38670 (CC BY 4.0), retrieved 2026-10-27. Ages follow the ICS chart — see how ranges are worked out.