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Arthropleura

✨ The giant millipede

Arthropleura was a giant millipede-like arthropod that lived during the Carboniferous period, around 345 to 290 million years ago. It is considered one of the largest land invertebrates ever known, with some individuals reaching lengths of more than 2 meters.

Its long, flattened body was made up of many segments protected by hard plates, and each segment carried pairs of legs that helped it move across the forest floor. Unlike modern millipedes, Arthropleura belonged to an extinct group of arthropods with unique features that made it different from living species.

This enormous creature lived in the humid forests of ancient continents, where giant plants formed dense environments rich in oxygen. Scientists think Arthropleura was mainly a plant eater, feeding on fallen leaves, decaying vegetation, and other organic material found on the ground.

Its fossils have been discovered mainly in regions that were once part of Europe and North America. The exact reasons for its disappearance are still debated, but changes in climate and ecosystems at the end of the Carboniferous likely played an important role. Arthropleura shows how different and diverse life on Earth was long before the age of dinosaurs.

💡 Did you know?

A complete Arthropleura head has never been found! We know its huge body thanks to fossils of its segments, but its head remains a mystery. It's believed it didn't have venomous claws like modern millipedes but rather simple jaws for grinding dead leaves and rotten wood.

Imagine crossing paths with an Arthropleura in a forest! Many of its fossilized footprints have been found in sandstone. These tracks show that it moved quickly between the giant trees of the Carboniferous, flexibly avoiding obstacles despite its colossal size. It was the heaviest animal of its time without an internal skeleton!

Arthropleura breathed through small holes on the side of its body called spiracles. For such a large animal to oxygenate its entire body without lungs, the air had to be very rich. When Earth's oxygen levels dropped millions of years later, these giants could no longer breathe and eventually disappeared.