Dinosaur
Pachycephalosaurus
The one with the hard, bony dome on its head.
Say it: pack-ee-KEF-ah-lo-sore-us
- Name means
- Thick-headed lizard
- What it was
- A plant-eating dinosaur with a domed head
- Size
- About 3 metres long and about 450 kilograms
- Ate
- Leaves, fruit and seeds
- Lived
- Late Cretaceous, 69 to 66 million years ago
- Fossils found
- Canada and the USA

Facts for little ones
- It had a big bony dome on its head, ringed with spikes and bumps.
- Some scientists think it used its dome for head-butting, others think it was for showing off.
Pachycephalosaurus in Dinolets
Pachycephalosaurus is egg number 10 of 12. In the game it's purple, and its special feature is the one the voice calls out: "A hard dome!" The voice says its name as "pack-ee-SEF-ah-lo-SORE-us".
In Feed it eats plants, and from level 2 your child is asked to pick the right food for it. Once it has hatched, it joins in the other games too.
Sources
Checked November 2026 against:
