Dinosaurs · Small ornithopod

Yandusaurus

Say it yen-doo-sore-us. The name means ‘Yandu lizard’.

Yandusaurus beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of small ornithopods

Length: 3 m
Diet: Plant-eater
When: Mid Jurassic169 to 159 million years ago
Fossils found in: China
Named by: He (1979)
Family tree: Dinosauria › Ornithischia › Ornithopoda › Euornithopoda

Where Yandusaurus sits in the age of dinosaurs.Periods from the ICS chart; dinosaur dates from the Natural History Museum

Small ornithopods. Small, fast, two-legged plant-eaters. See all 12

Lived at the same time

Agilisaurus · same country
Bellusaurus · same country
Monolophosaurus · same country
Omeisaurus · same country
Sinraptor · same country
Yuanmousaurus · same country
Gasosaurus · same country
Huayangosaurus · same country

Other small ornithopods

Dryosaurus Late Jurassic
Valdosaurus Early Cretaceous
Atlascopcosaurus Early Cretaceous
Zephyrosaurus Early Cretaceous
Leaellynasaura Early Cretaceous
Oryctodromeus Late Cretaceous
Gasparinisaura Late Cretaceous
Parksosaurus Late Cretaceous

Source: Yandusaurus in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.