Macuahuitl tail

Around a month ago a strange newly discovered dinosaur was dug up. Its name was Stegouros Elegassen meaning roof tail. This ankylosaurid (the heavily armored quadrupedal dinosaurs) was discovered in Chile and it lived around 72 million years ago during the Cretaceous period, but at the time it lived in Chile it was connected to antarctica. This ankylosaurid is the first ankylosaurus discovered in South America though to not exist on that continent and the one only ankylosaurus fossil that is up to 80% complete. But the main attraction I have to this new dinosaur is its tail and how close it looks to Macuahuitl. Macuahuitl is an ancient weapon used by Aztec warriors used to enforce heavy blunt force damage. The weapon was a wood club infused with sharp obsidian blades surrounding the edge of the club. Like convergent evolution, the biological weapon used by dinosaurs was later invented by humans to do almost the same thing it was used for 72 million years ago. Another thing that I found interesting about this creature is how small it was around knee high, but the largest predators were abelisauroids which are not that large themselves so hit form their tails would still do a lot of damage.