New high latitude Capnuchosphaera species (Triassic Radiolaria) from Waipapa Terrane,New Zealand |
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| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Wuhan), Wuhan 430074, China;2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Wuhan), Wuhan 430074, China;1. Department of Earth Sciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands;2. Centre for Geobiology, Department of Earth Sciences, University of Bergen, Allégaten 41, N-5007 Bergen, Norway;3. Department of Petrology, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands;1. Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Campi 103, 41125 Modena, Italy;2. Indiana Geological and Water Survey, Indiana University, 611 North Walnut Street, Bloomington, IN 47405, USA;3. U.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, VA 20192, USA |
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| Abstract: | Two new species and one new subspecies of genus Capnuchosphaera, (Capnuchosphaera tumida nov. sp., C. waihekeensis nov. sp. and C. texensis australis nov. ssp.) are described herein from phosphatic nodules included in mudstone and sandstone beds of the Waipapa Terrane, Waiheke Island, New Zealand. The phosphatic nodules yielded a rich Late Triassic (Carnian-Norian) radiolarian fauna, with a high abundance of spumellarian taxa including numerous species of the genera Capnuchosphaera, Vinassaspongus, Kahlerosphaera, Sarla and Dumitricasphaera. Waiheke Island Capnuchosphaera are characterized by a large cortical shell and a distinctively low ratio of spine length to cortical shell diameter. These features differ significantly from those of Capnuchosphaera in the Tethyan Realm and are considered to be the result of adaptation to an Austral-New Zealand peripheral ocean of Gondwanaland in the Mesozoic Southern Hemisphere. |
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| Keywords: | Radiolaria Late Triassic Waipapa Terrane New Zealand Radiolaires Trias supérieur Waipapa Nouvelle-Zélande |
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