Ajubus  Ajubus is a genus of leaf beetles in the subfamily Eumolpinae. It contains only one species, Ajubus viridis, described from Champion Bay in Western Australia. The genus was originally named "Thaumastomerus" by Hamlet Clark in 1865; however, this name was preoccupied by "Thaumastomerus" Wollaston, 1861 (a beetle genus in Curculionidae), so it was renamed to "Ajubus" by N. A. Aslam in 1968.