Wie hängen sie zusammen

In addition to horn scales, spikes can also be very effective at repelling enemies. While dinosaurs such as Stegosaurus relied on bony plates and a spiky tail, similar features can also be found in pufferfish, sea urchins, porcupines, and hedgehogs. In Messel, we find a distant relative of today's hedgehogs, who also possessed a coat of spikes.