A latest Permian radiolarian fauna is described from a chert-clastic sequence exposed at Khao Wang Chik, Klaeng, eastern Thailand. This fauna was recovered from a continuous siliceous sequence comprised of white to light gray siliceous shale, dark gray bedded chert, and dark gray siliceous shale. The fauna is composed of Neoalbaillella optima, Albaillella levis, A. triangularis, Entactinia itsukaichiensis, Triaenosphaera minuta, Ishigaum trifustis, Nazarovella inflata, Triplanospongos musashiensis, Copicyntra akikawaensis and others. These radiolarians represent the latest Permian Neoalbaillella optima Assemblage reported from Japan, Russian Far East, Philippines, south and southwestern China, and northern Thailand. The radiolarian-bearing sequence was probably deposited in the deep, pelagic environment of the Paleotethys Ocean. An overlying coarse-grained clastic sequence reflects an abrupt change in local depositional environment, possibly caused by the narrowing of the Paleotethys Ocean in Early Triassic time. Twenty-eight radiolarian species belonging to 15 genera are systematically investigated. One new genus, Klaengspongus, and four new species, Triaenosphaera longispina, Ishigaum klaengensis, Pseudospongoprunum? fontainei, and Klaengspongus spinosus are described.
For 50 years, Micropaleontology has been the leading international peer-reviewed journal devoted to all aspects of the study of microscopic fossil remains. The ubiquitous abundance and huge diversity of microfossils, primarily protozoa (foraminifera, radiolaria, dinoflagellates, diatoms, coccolithophores), but also crustacea (ostracoda), spores (fungi and plant), and vertebrates (condodonts) in marine and freshwater strata, have important commercial applications in guiding geologists in subsurface exploration for oil and gas. In recent years, Micropaleontology has become increasingly important in providing basic data for research on organic evolution and the history of climate change, ocean circulation, and development of global ecosystems.
The Micropaleontology Project, Inc., a private non-profit corporation, was formed in July 2003 with the staff and property of the discontinued Micropaleontology Press at the American Museum of Natural History (AMNH), where it had been housed as an independent program since 1942. The Project was first organized under its present name with "work relief" (WPA) funds during the Depression to build the renowned "Ellis and Messina Catalogue of Foraminifera," at one time employing more than 200 researchers, typists, photographers, artists and printers. During the postwar years at AMNH, with the support of major oil companies, Micro Press expanded to publish catalogues on other microfossil groups (ostracoda, diatoms, radiolaria, coccoliths) as well as the peer-reviewed journal Micropaleontology and the bibliographic service Bibliography and Index of Micropaleontology.
This item is part of a JSTOR Collection.
For terms and use, please refer to our Terms and Conditions
Micropaleontology
© 2000 The Micropaleontology Project., Inc.
Request Permissions