Hori et al.-Early Triassic Radiolaria from New Zealand

Journal of the Royal Society of New Zealand abstracts

Triassic Radiolaria from Kaka Point Structural Belt, Otago, New Zealand

R. S. Hori

Department of Earth Sciences, Ehime University, 790-8577, Matsuyama, Japan.
Email: shori@sci.ehime-u.ac.jp

J. D. Campbell

Deceased; late of Department of Geology, University of Otago, P.O. Box 56, Dunedin, New Zealand.

J. A. Grant-Mackie

Department of Geology, The University of Auckland, Private Bag 92 019, Auckland, New Zealand.

Abstract Triassic Radiolaria are documented from phosphatic nodules obtained from the Karoro Formation and Potiki Siltstone from Kaka Point Structural Belt, Otago, New Zealand. There are abundant Glomeropyle and Spumellaria, and rare Nassellaria and Entactinaria. By comparison with radiolarian faunas from Japan, Thailand, European Tethys, and other Triassic strata in New Zealand, the Karoro Formation is correlated with upper Lower Triassic (Olenekian), older than the Potiki Siltstone. We believe that the fauna is strongly affected by non-Tethyan radiolarians based on the abundance of Glomeropyle, rare occurrence of Tethyan taxa, and the presence of many undescribed forms. Three new species are described herein: Glomeropyle bispinosa, G. campbelli, and Poulpus (?) caveaformis.

Keywords Early Triassic; Olenekian; Radiolaria; Glomeropyle; Poulpus; new species; non-Tethyan; Kaka Point Structural Belt; New Zealand

R02038 Received 29 August 2002; accepted 11 February 2003; published 30 April 2003
© Journal of the Royal Society of New Zealand, Volume 33, Number 1, March 2003, pp 39-55

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