Australian (Non-Insect) Hexapods

At one time classified as three orders within the class Insecta, this group of primitive hexapods has undergone several revisions over the years. Current classification comprises two classes: the springtails of Collembola, and the proturans and diplurans (two-pronged bristletails) of class Entognatha. Along with Insecta, the Collembola and Entognatha form the invertebrate subphylum Hexapoda. All have six legs and mouthparts that are somewhat internal, due to being obscured by parts of face (entognathous). Life cycle consists of an egg and several instars between this and adult stage.