Invid Mecha
Invid mecha are generally insectine in appearance, with single scanner eyes and favoring claw-like pincers for melee attack. Energy weapons included in the front-line designs, including all mecha of the Regent's army, are of the plasma variety, firing "annihilation discs" that behave like energy frisbees. Specialized mecha developed by the Regis' forces during the occupation of Earth diverge from this weapon scheme while retaining the signature eye scanner.
Read more about this topic: Invid (Robotech)