Aridaeus princeps is a species of longhorn beetle belonging to the family Cerambycidae that is found in Australia.

[2][3] Its physique is characterized by spare white pubescence and a velvety black exterior.

[3] Red markings are present on its head, palpi, scutellum, and elytra.

[3] The prothorax of Aridaeus princeps is ovate, widest at the middle, and constricted at the base; the scutellum is triangular and pubescent.

[3] The elytra, widest at the shoulder display a red pattern, while the long legs with stout femora, terminate behind the tibiae.