Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/5187
Title: Revision of 'Discomesites' and 'Estaingia' (Trilobita) from the Lower Cambrian Cymbric Vale Formation, Western New South Wales: Taxonomic, Biostratigraphic and Biogeographic Implications
Contributor(s): Paterson, John R  (author)orcid 
Publication Date: 2005
Handle Link: https://hdl.handle.net/1959.11/5187
Abstract: The taxonomy of Discomesites and Estaingia from the Lower Cambrian Cymbric Vale Formation of western New South Wales is revised. Discomesites is regarded as a valid subgenus of Pagetides. Pagetides (Discomesites) fragum is considered a senior subjective synonym of P. (D.) lunatulus. Pagetides (Discomesites) spinosus from the Shackleton Limestone in the Holyoake Range, Transantarctic Mountains, is considered to be a junior subjective synonym of P. (D.) fragum. Estaingia cerastes from the Cymbric Vale Formation is considered to be synonymous with Hsuaspis cf. H. bilobata from the Shackleton Limestone. The Cymbric Vale Formation trilobite fauna is of late Early Cambrian (late Botoman) age, equivalent to the Pararaia janeae Zone of South Australia, based on correlation of the Syringocnema favus archaeocyathan fauna. Absolute ages of recently dated tuffs from the Cymbric Vale and Billy Creek Formations are questioned, based on new information regarding the stratigraphic position of the Cymbric Vale Formation tuff in relation to archaeocyathan and trilobite biostratigraphy. The co-occurrence of Pagetides (Discomesites) fragum and Estaingia cerastes in the upper part of the Cymbric Vale Formation and in the Shackleton Limestone represents the first species-level correlation between the Lower Cambrian of Australia and Antarctica using trilobites. The distribution of these trilobite species, in association with the Syringocnema favus archaeocyathan fauna, provides supporting evidence that Australia and Antarctica were connected by a continuous carbonate-detrital shelf during the late Early Cambrian (mid-late Botoman),allowing faunal exchange between these regions.
Publication Type: Journal Article
Source of Publication: Proceedings of the Linnean Society of New South Wales, v.126, p. 81-94
Publisher: Linnean Society of New South Wales
Place of Publication: Matraville, Australia
ISSN: 0370-047X
Field of Research (FOR): 060302 Biogeography and Phylogeography
040308 Palaeontology (incl Palynology)
040311 Stratigraphy (incl Biostratigraphy and Sequence Stratigraphy)
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Other Links: http://trove.nla.gov.au/work/11271281
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Appears in Collections:Journal Article
School of Environmental and Rural Science

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