Lower Carboniferous radiolarian fauna is described from a sandstone-chert sequence exposed at Saba Yoi-Kabang (Kabang), southernmost part of peninsular Thailand. This fauna was recovered from a thinly-bedded black chert intercalated in thickly bedded sandstone. The fauna is composed of Albaillella deflandrei, Archocyrtium tinnulum, Pylentonema antiqua, Stigmosphaerostylus variospina, Triaenosphaera sicarius, Astroentactinia biaciculata, Astroentactinia mirousi and other taxa. These radiolarians represent the upper Tournaisian (Lower Carboniferous) Albaillella indensis Assemblage reported from central Pyrenees, France, southwestern China, peninsular Malaysia, and eastern Australia. The radiolarian-bearing sequence was probably deposited in a pelagic or hemipelagic environment within the Paleotethys Ocean in Early Carboniferous time. Twenty-three radiolarian species belonging to 13 genera including four unidentified genera are investigated.
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