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Non-Tethyan Triassic Radiolaria from New Zealand and northeastern Siberia

Yoshiaki AITA & Nikita Yu. BRAGIN

en Geodiversitas 21 (4) - Pages 503-526

Published on 24 December 1999

Well-preserved Middle Triassic radiolarian faunas have been documented from phosphatic nodules collected from the Waipapa Terrane, New Zealand and the Omolon Massif, northeastern Siberia, respectively. Both New Zealand and northeastern Siberia faunas include many species that are well-known from European Tethys area, including Silicarmiger costatus costatus Dumitrica, Kozur & Mostler, 1980 which indicates an early Ladinian age. These Tethyan species occur with abundant non-Tethyan radiolarians that are characteristic of these faunas. Distinctive pylomate spumellarians are described herein as a new genus Glomeropyle Aita & Bragin. This genus has not been recognized in Middle Triassic sequences of Europe, Japan, Southeast Asia or North America. Seven new Middle Triassic species are described: Glomeropyle aurora, Glomeropyle boreale, Glomeropyle poinui, Glomeropyle (?) galagala, Glomeropyle grantmackiei, Glomeropyle mahinepuaensis, Glomeropyle waipapaensis. They do not haveTethyan affinities and are only known from northern and southern high latitudes. They are Triassic Radiolaria with a bipolar distribution pattern.

Keywords :

Radiolaria, non-Tethyan, Middle Triassic, New Zealand, Siberia, new species, Glomeropyle n. gen