Dinosaurs · Large ornithopod

Tanius

Say it tahn-ee-us. The name means ‘[H. C.] Tan’.

No length given in the museum's record.

The museum gives no length for this dinosaur, so we cannot draw it to scale.Body shape drawn for this site, showing the general build of large ornithopods

Diet: Plant-eater
When: Late Cretaceous89 to 66 million years ago
Fossils found in: China
Named by: Wiman (1929)
Family tree: Dinosauria › Ornithischia › Ornithopoda › Hadrosauridae

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

Large ornithopods. Big plant-eaters that walked on two or four legs, including the duck-billed dinosaurs. See all 36

Lived at the same time

Sonidosaurus · same country
Microceratus · same country
Alectrosaurus · same country
Archaeornithomimus · same country
Bactrosaurus · same country
Micropachycephalosaurus · same country
Mononykus · same country
Nanshiungosaurus · same country

Other large ornithopods

Brachylophosaurus Late Cretaceous
Nipponosaurus Late Cretaceous
Gryposaurus Late Cretaceous
Aralosaurus Late Cretaceous
Bactrosaurus Late Cretaceous
Jaxartosaurus Late Cretaceous
Lophorhothon Late Cretaceous
Telmatosaurus Late Cretaceous

Source: Tanius 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.