The basic palynostratigraphical subdivision of the Cooper / Galilee / Eromanga and the Surat / Bowen Basin regions was developed in the 1960s. Since that time, the basic unit nomenclature (J1, Tr2a, etc.) applied then has been retained so as to give continuity of reporting, even though the addition of new data has necessitated the revision of the definition and scope of the units and subunits. Now the cumulative effect of these changes is such that there is a variety of usage and interpretation for these units which still bear the same names or letter/number codes. Thus, so as to avoid future confusion, it is proposed to introduce the latest modifications to the late Palaeozoic and Mesozoic palynostratigraphical units with a new nomenclature which will distinguish it from the earlier units and interpretation. An alpha-numerical nomenclature has been adopted for the proposed units. It is hierarchical in structure, with the numerical value increasing from oldest to youngest within each geological period. The first character of the unit nomenclature (P = spore/pollen, D = dinoflagellate) indicates the palynomorph group used to define the unit. The second character (P = Permian, T = Triassic, K = Cretaceous) gives the adopted geological age. The third, fourth, fifth and sixth characters are numerals indicating the relative stratigraphical position - the higher the number, the younger or higher the stratigraphical position. The proposed units, together with their general relationships to the superseded units, the lithostratigraphical units and geological age, are presented on accompanying tables and figures.