Trilobots

The Trilobots were a species of Robotic trilobites that inhabited the Robo-planetoid in 3010. They descended from Nanobots created by Professor Farnsworth and evolved into Robo-dinosaurs and R2 units. These machines cannibalized the for metals and attacked the Planet Express crew, forcing them to hide in a cave for protection.

Trivia

 * Their name is a pun on the.