Late Cambrian trilobites from the Dolodrook River limestones, eastern Victoria, Australia

An early Late Cambrian (late Mindyallan-Idamean) trilobite fauna is described from limestone bodies in the Dolodrook River area, eastern Victoria. Seven taxa are referred to previously described species: Innitilgnostus inexpectans (Kobayashi, 1938), Pseudagnostus Idalis Opik, 1967, Corynexochus plumula Whitehouse, 1939, Rhyssometopus thielei (Chapman, 191 I), Eugonocare tessel/atum Whitehouse, 1939, Protemnites magnificans Shergold & Webers, 1992 and Meteoraspis etheridgei (Chapman, 1911), seven taxa are left under open nomenclature: Idolagnostus ?agrestis Opik, 1967, Peratagnostus aff. invalidus (Lu & Lin, 1989), Ammagnostus sp., Tomagnostel/a sp., Pterocephaliid? gen. et sp. indet., Tsinaniid gen. et sp. indet. 1 and Tsinaniid gen. et sp. indet. 2, and one represents a new species: Mindycrusta oepiki sp. nov. Protemnites Whitehouse, 1939 is considered to be a senior subjective synonym of Prismenaspis Henderson, 1976a. Two trilobite assemblages are recognised: the Protemnites Assemblage and the Mindycrusta Assemblage. The Protemnites Assemblage is interpreted as representing an autochthonous assemblage inhabiting a moderate to high energy, inner shelf(peritidal) environment. The Mindycrusta Assemblage represents a parautochthonous assemblage inhabiting a low to moderate energy, open ocean-facing, outer shelf to upper slope environment.