Early Ordovician Conodonts from Far Western New South Wales, Australia. Records of the Australian Museum 55(2): 169–220

Early Ordovician Conodonts from Far Western New South Wales, Australia. Records of the Australian Museum 55(2): 169–220

© Copyright Australian Museum, 2003 Records of the Australian Museum (2003) Vol. 55: 169–220. ISSN 0067-1975 Early Ordovician Conodonts from Far Western New South Wales, Australia YONG-YI ZHEN1*, IAN G. PERCIVAL2 AND BARRY D. WEBBY3 1 Division of Earth & Environmental Sciences, Australian Museum, 6 College Street, Sydney NSW 2010, Australia [email protected] 2 Specialist Services Section, Geological Survey of New South Wales, PO Box 76, Lidcombe NSW 2141, Australia [email protected] 3 Centre for Ecostratigraphy & Palaeobiology, Department of Earth & Planetary Sciences, Macquarie University NSW 2109, Australia [email protected] ABSTRACT. Thirty species (representing 19 genera) of Early Ordovician conodonts are described and illustrated from Mount Arrowsmith and Koonenberry Gap in the northwestern part of New South Wales. One new genus, Cooperignathus, and the new species Oepikodus pincallyensis, are established. Acodus sp. cf. emanuelensis predominates in 35 samples from the Tabita Formation and upper beds of the underlying Yandaminta Quartzite at Mount Arrowsmith, associated with ramiform and pectiniform taxa including species of Cooperignathus, Prioniodus, Oepikodus, Erraticodon, and Baltoniodus. The Koonenberry Gap fauna is dominated by coniform species, particularly Protopanderodus nogamii, P. gradatus, and Scolopodus multicostatus. Both faunas span an age range from latest Bendigonian to Chewtonian (evae Zone); their compositional differences are probably related to slight variations in water depths and depositional environments. Species endemic to the shallow water Australian cratonic region, represented by Bergstroemognathus kirki, Triangulodus larapintinensis, Acodus sp. cf. emanuelensis and Prioniodus sp. cf. amadeus, support a correlation with Early Ordovician faunas of central and western Australia, particularly those from the lower Horn Valley Siltstone of the Amadeus Basin. Biogeographically significant species in the western New South Wales faunas include Cooperignathus nyinti, C. aranda and Scolopodus multicostatus, which provide linkages with counterparts in North America and South China. Cosmopolitan elements in the documented collections are represented by Cornuodus longibasis, Drepanoistodus basiovalis, and Scolopodus quadratus. Only one species, Scalpellodus latus, from Mount Arrowsmith appears to be otherwise confined to Baltoscandia (northern Europe). ZHEN, YONG-YI, IAN G. PERCIVAL & BARRY D. WEBBY, 2003. Early Ordovician conodonts from far western New South Wales, Australia. Records of the Australian Museum 55(2): 169–220. * author for correspondence www.amonline.net.au/pdf/publications/1383_complete.pdf.

View Full Text

Details

  • File Type
    pdf
  • Upload Time
    -
  • Content Languages
    English
  • Upload User
    Anonymous/Not logged-in
  • File Pages
    1 Page
  • File Size
    -

Download

Channel Download Status
Express Download Enable

Copyright

We respect the copyrights and intellectual property rights of all users. All uploaded documents are either original works of the uploader or authorized works of the rightful owners.

  • Not to be reproduced or distributed without explicit permission.
  • Not used for commercial purposes outside of approved use cases.
  • Not used to infringe on the rights of the original creators.
  • If you believe any content infringes your copyright, please contact us immediately.

Support

For help with questions, suggestions, or problems, please contact us