Middle Jurassic radiolarian fauna from Rotti Island,Indonesia |
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| Affiliation: | 1. Institute of Geoscience, University of Tsukuba, Ibaraki, 305-8571, Japan;2. Research and Development Center for Geotechnology, Bandung, Indonesia;3. Department of Geoscience, Faculty of Science, Yamaguchi University, Yamaguchi, 753-8512, Japan;1. Department of Earth and Atmospheric Sciences, NIT, Rourkela 769008, India;2. Department of Geology, Nagaland University, Kohima, Nagaland 797001, India;1. Univ. Lille, CNRS, UMR 8198–Evo-Eco-Paleo, 59000 Lille, France;2. Université Mustapha Stambouli de Mascara, Faculté des Sciences de la Nature et de la Vie, BP 305, Route de Mamounia, 29000 Mascara, Algeria;1. Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA;2. Montefiore Medical Center, Bronx, NY, USA;3. Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA;4. Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA;5. Center for Public Health Genomics, University of Virginia, VA, USA;6. Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA;7. Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA;8. Department of Radiology, Tufts Medical Center, Tufts University School of Medicine, Boston, MA, USA;1. Formerly Geological Survey of India, Natural Energy Resources, Salt Lake, Kolkata 700091, India;2. Department of Geology, University of Delhi, Delhi 110007, India;1. Department of Geology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, H-1117, Hungary;2. Camborne School of Mines, University of Exeter, Penryn Campus, Cornwall, TR10 9FE, UK;3. ERNO, Instituto de Geología, UNAM, Apartado Postal 1039, Hermosillo, Sonora, 83000, Mexico;4. MTA-MTM-ELTE Research Group for Paleontology, Pázmány Péter sétány 1/C, Budapest, H-1117 Hungary |
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| Abstract: | A well-preserved Middle Jurassic radiolarian fauna was discriminated from calcareous shale of the Wai Luli Formation on Rotti Island, Indonesia. This fauna is characterized by the presence of Tricolocapsa plicarum, Tricolocapsa ? fusiformis, Stichocapsa japonica, S. convexa, Cyrtocapsa mastoidea, Protunuma turbo, Transhsuum maxwelli, Eucyrtidiellum sp., Archaeodictyomitra sp. A. and others. These radiolarians represent the T. plicarum Assemblage reported from Bajocian and early Bathonian (Middle Jurassic) sequences in Japan and southeastern Europe. Based on accumulated micropaleontological evidence in Timor Island contributed by the present authors, Rotti Island was probably positioned within a warm water current system originating in the low latitude Tethyan realm through the Middle Jurassic. Fifteen species belonging to seven genera are systematically investigated. Among them, Tricolocapsa multispinosa and Tricolocapsa matsuokai are described as new. |
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