Dinosaurs · Small ornithopod

Leaellynasaura

Say it LEE-ELL-IN-a-SORE-a. The name means ‘Leaellyns lizard’.

Leaellynasaura 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: 2 m
Diet: Plant-eater
When: Early Cretaceous115 to 110 million years ago
Fossils found in: Australia
Named by: Rich and Rich (1989)
Family tree: Dinosauria › Ornithischia › Ornithopoda › Euornithopoda

Where Leaellynasaura 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

Atlascopcosaurus · same country
Minmi · same country
Austrosaurus · same country
Muttaburrasaurus · same country
Acrocanthosaurus
Archaeoceratops
Deinonychus
Equijubus

Other small ornithopods

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

Source: Leaellynasaura 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.