Every month, 100,000 readers use the Dinosaur Database, but we receive no support from you. Developing and updating the database requires a lot of work. Therefore, as of September 1, 2025, the database will be closed. If you want it to remain open and be updated, please support us via the "Buy us a coffee" button available on every page.
Dinosaur: Yamatosaurus izanagii

Length*: | 7.6 m | 24.9 ft |
Weight*: | 1.7 t | 3,748 lb |
*The largest known specimen
Period
Epoch: Late Cretaceous
Stage: Early Maastrichtian
Years: 72.1–66 Ma
Details
Status: valid
Author: Kobayashi et al.
Year: 2021
Distribution
Locations
Sources
Material: Right dentary, right surangular, teeth, 4 cervical vertebrae, distal caudal vertebra, 3 cervical ribs and coracoid.
References: Kobayashi, Y.; Takasaki, R.; Kubota, K.; Fiorillo, A. R. (2021). "A new basal hadrosaurid (Dinosauria: Ornithischia) from the latest Cretaceous Kita-ama Formation in Japan implies the origin of hadrosaurids".