VAEZNIA, P., VAHIDI NIA, M., MOUSAVI NIA, A. and KHOSRAVI, E. 2026. The first report of fossil shark remains in the Aitamir Formation and determination of its precise age based on Foraminifera in the Behkadeh Razavi section, western part of the Kopet-Dagh sedimentary basin. Iranian Journal of Ichthyology. 13, 2 (Sep. 2026), 69–86. DOI:https://doi.org/10.22034/iji.v13i2.1157.