End-Guadalupian extinction of larger fusulinids in central Iran and implications for the global biotic crisis

The end-Guadalupian (Capitanian) biotic crisis was less intense than its end-Permian counterpart but highly selective against certain groups of tropical organisms, such as rugose corals and keriothecal-walled fusulinid foraminifera. The causes of this event remain debated, in part due to apparent disagreement among stratigraphic sections in the timing of taxonomic losses. In order to further constrain the timing of extinction and assess the...