What are jointrons?

Some articles on jointron, jointrons:

Tripledacus - Beast Wars Second - Animated Series
... The Jointron Bothers first appear in episode #14, "The Combined Giant, Tripledacus " where their ship crashes on the planet ... Upon arriving on Gaea the Jointrons briefly fight Bighorn, Diver, Tasmanian Kid, Starscream and BB ... The Jointron Bothers appear in episode #15, "The Festive Jointrons", where they throw a party with the Maximals which is invaded by Dirge and Thrust ...