Relationships of Australian species of the agnostoid genera Goniagnostus and Lejopyge are discussed and some revisions made. Goniagnostus consists of G. (Goniagnostus), containing G. (G.) nathorsti and G. (G.) scarabaeus; G. (Criotypus) containing G. (C.) oxytorus and G.(C.) lemniscatus; and G. (Allobodochus) containing G. (A.) fumicola and G. (A.) spiniger. Representatives of Lejopyge are L. armata, L. laevigata, L. caiva, L. dubium, L. multifora and L. cosfordae. Goniagnostus is considered to have evolved from Triplagnostus (Triplagnostus) and Lejopyge possibly from Onymagnostus.
- Middle cambrian