Radiolaria from the LateEocene Oamaru Diatomite, South Island, New Zealand

摘要

Radiolarian faunas form seven localities of the well known Late Eocene Oamaru Diatomite were studied. All samples contained well preserved Radiolaria, generally of common or greater abundance, along with numerous sponge spicules and diatoms. Radiolarian faunal composition confirms a Late Eocene age for the Oamaru Diatomite. The Radiolaria are documented, with 24 new species described and three new genera erected. The new Species are Tricorporisphaera bibula, Zealithapium oamaru (Actinommidae), Plectodiscus runanganus (Poro- Discidae), Plannapus hornibrooki, P. Mauricei, Spirocyrtis greeni (Actinommidae), Botryocella pauciperforata (Cannobotryidae), Carpocanopsis ballisticum (Carpocanidae), Verutotholus doigi, V. Edwardsi, V. Mackayi (Neo- sciadiocapsidae), Lithomelissa lautouri, Velicucullus fragilis (Plagoniidae), Lamprocyclas particollis (Ptero- corythidae), Artophormis fluminafauces, Eucyrtidium ventriosum, Eurystomoskevos cauleti, Lophticollis (Ptero- corythidae), Artophormis fluminafauces, Eucyrtidium ventriosum, Eurystomoskevos cauleti, Lophocyrtis (L.) haywardi, Lychnocanium alma, L. Waiareka, L. Waitaki, Pterosyringium hamata, Setochytris cavipodis and Thyrsocyrtis (T.?) pinguisicoides (Theoperidae).