Sardonites

The Sardonite are a lizard-like alien race. Imperial scholars have calculated their home world to be located somewhere in the sparsely populated southwestern part of Segmentum Tempestus.

The proton disruptors used by the Sardonite raiding ships are powerful weapons that fire an intense beam, alternating protons and electrons, designed to do heavy damage to a ship’s electrical system.

Source
Sardonitas
 * Fanatic Online 20.