A Living Tank: Discovery of the World’s Oldest Ankylosaur in Morocco
In a discovery that has sent shockwaves through the paleontological community, researchers have unveiled the most complete remains of Spicomellus afer, the world’s oldest known ankylosaur. Unearthed in the Middle Atlas Mountains of Morocco, this 165-million-year-old “living tank” is rewriting the history of armored dinosaurs.

Anatomical Bizarreness
While ankylosaurs are renowned for their heavy defenses, Spicomellus—meaning “collar of spikes”—takes it to an extreme. Unlike any other vertebrate known to science, living or extinct, this dinosaur possessed bony spikes fused directly to its ribs.

“We’ve never seen anything like this in any animal before,” says Professor Richard Butler, highlighting the creature’s unique anatomy. The specimen features an ossified neck collar adorned with mᴀssive spikes reaching nearly a meter in length. These were not mere skin appendages; they were structural extensions of the skeleton itself, suggesting a formidable display of both beauty and defense.

Rewriting Evolutionary History
For decades, scientists believed the iconic “tail club” of the ankylosaur lineage didn’t evolve until the Early Cretaceous. However, the discovery of specialized “handle” vertebrae in the Spicomellus fossil suggests this weaponized tail existed at least 30 million years earlier than previously thought.

This find also challenges the long-held theory that armored dinosaurs originated in the northern hemisphere (Laurasia). By positioning this complex ancestor in North Africa, researchers are now looking at the continent as a potential cradle for the entire group.

Display Over Defense?
The sheer complexity of the Spicomellus armor leads experts to speculate that its primary purpose may have been social display—attracting mates or ᴀsserting dominance—rather than purely defensive. The shift toward simpler, more streamlined armor in later species suggests a fascinating evolutionary pivot: as predation pressures increased over millions of years, the extravagant “ornaments” of the Jurᴀssic gave way to the utilitarian shields of the Cretaceous.

This breakthrough discovery, detailed in the journal Nature, confirms that the early history of the armored giants is far more intricate and “spiky” than we ever dared to imagine.