Middle to Late Eocene polycystine radiolarians from the Site 1172, Leg 189, Southwest Pacific

Noritoshi Suzuki, Kaoru Ogane, Kentaro Chiba

Mid to late Eocene radiolarian faunas in the >61 µm fraction from ca 70 samples of Southwest Pacific ODP Site 1172 were surveyed. All encountered morphotypes were classified when possible to species level. 158 species level morphotypes were determined: 84 have been previously described and the remaining 57 are in open nomenclature. A mixed assemblage of tropical and Antarctic indicators was concordant with current paleoceanographic models for Southwest Pacific area in Late Eocene. All the encountered morphotypes are illustrated and are provided with short descriptions of distinguishing features.

大阪微化石研究会誌

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0287-0436