Dinosaurs · Small theropod

Gasosaurus

Say it gas-oh-SORE-us. The name means ‘gas lizard’.

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

Length: 4 m
Diet: Meat-eater
When: Mid Jurassic170 to 160 million years ago
Fossils found in: China
Named by: Dong and Tang (1985)
Family tree: Dinosauria › Saurischia › Theropoda › Neotheropoda › Tetanurae › Avetheropoda

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

Small theropods. Small two-legged dinosaurs, many feathered, the group that includes birds. See all 60

Lived at the same time

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

Other small theropods

Proceratosaurus Mid Jurassic
Anchiornis Late Jurassic
Guanlong Late Jurassic
Nqwebasaurus Mid Jurassic
Coelurus Late Jurassic
Juravenator Late Jurassic
Ornitholestes Late Jurassic
Archaeopteryx Late Jurassic

Source: Gasosaurus 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.