Which Dinosaurs Had Spikes on Their Heads?

The world of dinosaurs is vast and varied, with many species showcasing unique physical attributes. One such intriguing feature is the presence of spikes or spines on their heads. These “spiky head dinosaurs” were not only visually impressive but also served critical survival functions. This article explores various types of dinosaurs that had spikes on their heads.

The Pachycephalosaurus: The Dinosaur with a Bump on Its Head

First on our list is the Pachycephalosaurus, often referred to as the dinosaur with a ‘bump’ or ‘big forehead.’ This dinosaur was known for its thick, domed skull which could be up to 10 inches thick. While not technically a spike, this formidable bump acted like one during confrontations, as Pachycephalosaurus would use it to ram opponents.

Stygimoloch: The Dinosaur with Horns and Spikes

The Stygimoloch, a close relative of the Pachycephalosaurus, takes the head ornamentation a step further. In addition to a bony dome, it boasted two large horns at the back of its head and several smaller spikes around them, earning it the nickname “dinosaur with horns and spikes.”

Carnotaurus: The T-Rex with Horns on Its Head

When we think of a T-Rex-like dinosaur with horns, Carnotaurus comes to mind. This dinosaur had two prominent horn-like structures above its eyes, giving it a menacing look. Although not technically a T-Rex, its similar bipedal structure and carnivorous diet make it a close relative.

Styracosaurus: The Dinosaur with a Spiked Frill

The Styracosaurus, a dinosaur with spikes on its head and back, is another fascinating creature. It had a large frill at the back of its skull adorned with long spikes. These spikes, along with its nose horn, made the Styracosaurus one of the most distinctive ceratopsians—a group that also includes the famous Triceratops.

Triceratops: The Three-Horned Dinosaur

Speaking of Triceratops, this dinosaur is one of the most iconic spiky dinosaurs. With two large horns over its eyes and a smaller one on its snout, it’s a classic example of a dinosaur with spikes on its head. Its large frill, although not spiky, adds to its impressive silhouette.

Einiosaurus: The Dinosaur with a Unique Spike

The Einiosaurus, a lesser-known relative of the Triceratops, had a unique nasal horn that curved forward like a can opener. In addition to this spike, it also had a frill with two hook-like projections at the rear, making it a standout in the dinosaur world.

Dilophosaurus: The Dinosaur with Crests

While the Dilophosaurus didn’t have spikes per se, it did have two prominent crests on its head. These structures were likely used for display purposes, much like the feathers of modern birds. Despite their lack of pointiness, these crests earn the Dilophosaurus a spot on our list of dinosaurs with head adornments.

Why Did Dinosaurs Have Spikes on Their Heads?

Spikes and other head adornments served various purposes in dinosaurs. They could be used for defense against predators, combat with rivals, attracting mates, or even regulating body temperature. In many cases, these features also helped distinguish between different species or sexes.


Dinosaurs were a diverse group of creatures, with a wide array of physical characteristics. The presence of spikes, horns, bumps, and crests on their heads made them even more fascinating and visually striking. These features not only added to their aesthetic appeal but also played crucial roles in their survival and behavior.

From the Pachycephalosaurus with its impressive dome to the horned Carnotaurus and the spiky Styracosaurus, each dinosaur with spikes on its head tells a unique story about life millions of years ago. As we continue to discover more about these incredible creatures, who knows what other spiky-headed dinosaurs we’ll uncover?

Leave a Comment