Abstract

A biostratigraphic subdivision of the Late Silurian and Early Devonian (Ludlovian to Dalejan inclusive) of New South Wales and Victoria is presented. The schemes proposed by Garratt (1980) for the Late Silurian and Early Devonian (based on notanopliid brachiopods), and by Philip & Pedder (1967a, b) for the Early Devonian (based mostly on conodonts and corals from limestones), are expanded to encompass the varied and abundant faunas of clastic sequences. New correlations with the Bohemian biostratigraphic sequence are suggested.

Late Silurian zones, based on brachiopod faunas, are: —

(a) Aegiria thomasi (early Ludlovian, to ?late Ludlovian); (b) Notoparmella plentiensis (?late Ludlovian to late Pridolian);

Early Devonian zones, based on brachiopods and corals, are: —

(c) Boucotia janaea (early Lochkovian); (d) Boucotia australis (late Lochkovian); (e) Boucotia loyolensis-Nadiastrophia (Pragian); (f) Spinella-Buchanathyris (late Pragian to early Zlichovian); (g) Malurostrophia-Taemostropia-Howittia (middle Zlichovian); (h) Phillipsastrea currani-Phacellophyllum furcatum (late Zlichovian to early Dalejan); (i) Macgeea touti-Phillipsastrea carinata-Endophyllum (middle Dalejan); (j) Megastrophia-Zdimir (late Dalejan).