Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/4985
Title: Palaeobiogeography of the Ordovician trilobite 'Prosopiscus', with a new species from western New South Wales
Contributor(s): Paterson, John R  (author)orcid 
Publication Date: 2004
DOI: 10.1080/03115510408619275
Handle Link: https://hdl.handle.net/1959.11/4985
Abstract: 'Prosopiscus' is particularly important in Ordovician palaeobiogeography because of its wide geographic distribution in Gondwana and peri-Gondwanan regions. It appears to have been confined to low palaeolatitudes, representing a characteristic member of the warm water eastern Gondwanan shelf faunas. Trends in the distribution of the Ordovician genus can be observed due to its long stratigraphic range. 'Prosopiscus' was restricted to, and may have originated in, Australia during the late Early Ordovician (Bendigonian-Chewtonian). By the Middle Ordovician (Darriwilian), 'Prosopiscus' had dispersed to other parts of Gondwana and peri-Gondwana, including the North and South China blocks, Tarim, central Himalayas, and the Argentine Precordillera (South America). Possible explanations for the distribution of 'Prosopiscus' are that: (1) there were no oceanic barriers preventing dispersal of trilobites between different regions of Gondwana, thus permitting uninhibited migration over vast distances; (2) 'Prosopiscus' was not restricted to a specific biofacies; (3) a major eustatic transgression during the early Darriwilian may have facilitated the dispersal of 'Prosopiscus' in allowing further development and expansion of marine environments; and (4) a prolonged planktonic larval stage may have permitted wide dispersal.
Publication Type: Journal Article
Source of Publication: Alcheringa: An Australasian Journal of Palaeontology, 28(1), p. 65-76
Publisher: Taylor & Francis Ltd
Place of Publication: Abingdon, United Kingdom
ISSN: 1752-0754
0311-5518
Field of Research (FOR): 040308 Palaeontology (incl Palynology)
060302 Biogeography and Phylogeography
060301 Animal Systematics and Taxonomy
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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School of Environmental and Rural Science

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