Arthropleura armata was a giant millipede-like arthropod that lived during the Carboniferous period. It could reach up to 2.5 meters in length and thrived in dense, humid forests. This species is known for its segmented body and robust exoskeleton, which helped it navigate through the undergrowth.

Arthropleura armata, a species from the extinct genus Arthropleura, was believed to have lived primarily in the regions that are now part of Europe and North America during the Late Carboniferous period, approximately 345 to 290 million years ago.

During the Late Carboniferous period, the Earth's climate was warm and humid, supporting vast swampy forest ecosystems. These environments were rich in vegetation such as ferns and seed ferns, and were characterized by extensive coal-forming wetlands.

Arthropleura armata is thought to have inhabited the dense, moist forest floors of these swampy regions. It likely thrived in the leaf litter and decomposing plant material, playing a role as a detritivore, feeding on decaying organic matter. This niche allowed it to grow to considerable sizes compared to modern arthropods.