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A total of 19 genera and 34 species of benthic foraminifera were identified in the Asmari Formation from a stratigraphic section located south Yasuj; north-central Zagros, Iran. The age of the Asmari Formation at the studied section is Oligocene (Rupelian-Chattian) and Early Miocene (Aquitanian-Burdigalian). Age was determined by the occurrence of Nummulites vascus-Nummulites fichteli; Eulepidina-Nephrolepidina-Nummulites; Miogypsinoides-Archaias-Valvulinid; and Borelis melo group-Meandropsina iranica assemblage zones. A Globbigerina spp. assemblage zone also occurs within the Borelis melo group-Meandropsina iranica assemblage zone west northwest of the study area. [ABSTRACT FROM AUTHOR]