New and Revised Llandovery (Early Silurian) Rugose Corals from Central Western New South Wales
Revision of some of the early Silurian rugose coral faunas from central western New South Wales and study of additional new collections warrants the introduction of a number of new taxa and some previous generic assignments need to be updated. The new cystiphyllinid genus Gephyrelasma McLean is proposed, comprising type species Dentilasma ramosum McLean and G. stevensi McLean sp. nov. The new kodonophyllid genus Vitiliphyllum McLean, with type species V. jenkinsi McLean sp. nov., and the new arachnophyllid genus Latomiphyllum McLean, with type species Arachnophyllum ? epistomoides Etheridge, are introduced. Additional new species include the tryplasmatids Aphyllum ulahense McLean and A. picketti McLean, as well as the ptychophyllinid Ptychophyllum sutorense McLean. Grewingkia neumani McLean is now regarded as a probable representative of the kodonophyllid Cyatholasma Ivanovskiy, while Dentilasma honorabile Ivanovskiy sensu McLean is now only tentatively assigned to that species. Since the original studies of the coral faunas, there has been considerable revision of the lithostratigraphy and biostratigraphy of the relevant sequences. The most current interpretations are reviewed and summarized here.