Paradoxides (like a puzzle) is among one of the most famous trilobites. At up to 15 in long, it was one of the largest trilobites ever, and it has a wide geographic range, stretching along the East Coast of North America as well as quite a bit of Europe, and even Columbia and Morocco.

Paleoecology[]
Paradoxides was among one of the most successful genera to ever live, having countless species assigned to it and living during the Middle Cambrian. It would have had to evade predators such as Anomalocaris.
Paradoxides had lived alongside the ancient continent of Avalonia, a major spawning point of the Cambrian Explosion. It went extinct by the time the Cambrian period was over. However, it foresaw many new genera of trilobites that would lead to the crustaceans' unbelievable success.