Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/30207
Title: Watsonella crosbyi from the lower Cambrian (Terreneuvian, Stage 2) Normanville Group in South Australia
Contributor(s): Jacquet, Sarah M (author); Brougham, Thomas (author); Skovsted, Christian B (author); Jago, James B (author); Laurie, John R (author); Betts, Marissa J  (author)orcid ; Topper, Timothy P (author); Brock, Glenn A (author)
Publication Date: 2017-09
Early Online Version: 2016-10-21
DOI: 10.1017/S0016756816000704
Handle Link: https://hdl.handle.net/1959.11/30207
Abstract: Correlation of lower Cambrian strata is often confounded by provincialism of key fauna. The widespread occurrence of the micromollusc Watsonella crosbyi Grabau, 1900 is therefore an important biostratigraphic signpost with potential for international correlation of lower Cambrian successions. Previous correlations of W. crosbyi from Australia (Normanville Group) suggested an Atdabanian- to Botoman-equivalent age. However, in the upper part of the Mount Terrible Formation, stratigraphic ranges of W. crosbyi and Aldanella sp. cf. golubevi overlap prior to the incoming of vertically burrowed 'piperock', which is indicative of an age no earlier than Cambrian Stage 2. The stratigraphic range of W. crosbyi in the Normanville Group, South Australia correlates with the ranges of the taxon in China, France, Mongolia and Siberia (though not Newfoundland). The new Australian data add further support for considering the first occurrence of W. crosbyi a good potential candidate for defining the base of Cambrian Stage 2. The stratigraphic range of W. crosbyi through the lower Cambrian Normanville Group has been determined based on collections from measured sections. Although rare, W. crosbyi is part of an assemblage of micromolluscs including Bemella sp., Parailsanella sp. cf. murenica and a sinistral form of Aldanella (A. sp. cf. A. golubevi). Other fauna present include Australohalkieria sp., Eremactis mawsoni, chancelloriids and Cupitheca sp.
Publication Type: Journal Article
Grant Details: ARC/DP129104251
Source of Publication: Geological Magazine, 154(5), p. 1088-1104
Publisher: Cambridge University Press
Place of Publication: United Kingdom
ISSN: 1469-5081
0016-7568
Fields of Research (FoR) 2008: 040308 Palaeontology (incl. Palynology)
040311 Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy)
060301 Animal Systematics and Taxonomy
Fields of Research (FoR) 2020: 370506 Palaeontology (incl. palynology)
310401 Animal systematics and taxonomy
Socio-Economic Objective (SEO) 2008: 970104 Expanding Knowledge in the Earth Sciences
970106 Expanding Knowledge in the Biological Sciences
Socio-Economic Objective (SEO) 2020: 280107 Expanding knowledge in the earth sciences
280102 Expanding knowledge in the biological sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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