Ornithischia

The best-known plated dinosaur: a low-browsing Morrison Formation herbivore with two rows of tall back plates and four formidable tail spikes. Its exceptionally complete holotype preserves rare details including a skull and throat ossicles.

A compact Tanzanian stegosaur with plates over the front half of its back and increasingly long defensive spikes toward the hips and tail.

A well-represented Chinese stegosaur with a long low skull, changing plate shapes along its back and formidable spikes toward the end of the tail.

A Portuguese stegosaur with at least seventeen neck vertebrae—more than most sauropods and far more than its short-necked relatives.

A heavily built European stegosaur with a long neck, broad back plates and formidable tail spikes, known from a historic English skeleton and newer Iberian fossils.

A huge, broad-bodied ankylosaurid from the final two million years of the Cretaceous, protected by bony armour and armed with a stiff-handled tail club. Despite its fame, no complete skeleton is known.