@article{oai:niigata-u.repo.nii.ac.jp:00006883, author = {Zamoras, Lawrence R. and Matsuoka, Atsushi}, journal = {Science reports of Niigata University. (Geology), Science reports of Niigata University. (Geology)}, month = {Mar}, note = {Abundant occurrence of radiolarians has been observed from the siliceous mudstone of the Tulbuan Plain, Busuanga Island, Palawan Province, Philippines. There are at least 60 species encountered with generally moderate to good preservation. The faunal assemblage is dominated by 2-to 4-segmented smaller nassellarians such as Stichocapsa robusta Matsuoka, Stylocapsa (?) spiralis Matsuoka, Stylocapsa tecta Matsuoka, Tricolocapsa conexa Matsuoka, Dicolocapsa conoformis Matsuoka, Zhamoidellum mikamense Aita. Zhamoidellum ventricosum Dumitrica, Protunuma (?) ochiensis Matsuoka and Sethocapsa funatoensis Aita. Other forms that occur abundantly include Hsuum maxwelli Pessagno gr. Parvicingula dhimenaensis Baumgartner and Orbiculiforma (?) spp. The high occurrence of Stylocapsa (?) spiralis indicates that the assemblage belongs to the S. (?) spiralis Zone or JR6 of Matsuoka (1995). Associated occurrence of Stylocapsa tecta, Dicolocapsa conoformis, Guexella nudata (Kocher) and G. sp. aff. G. nudata narrows down the represented age to the lower part of the S. (?) spiralis Zone which is assignable to late Callovian or early Oxfordian.}, pages = {91--109}, title = {Early Late Jurassic radiolarians from the clastic unit in Busuanga Island, North Palawan, Philippines}, volume = {15}, year = {2000} }