Bispiraloconulus serbicus Schlagintweit, Bucur & Sudar, 2019 (arborescent benthic foraminifer) and Torremiroella hispanica Brun & Canerot, 1979 from the late Barremian of Kopet-Dagh sedimentary basin (NE Iran) and their palaeobiogeographic revisions

Abstract

during micropaleontological investigations on the lower cretaceous successions of the tirgan Formation in Kopet-dagh sedimentary basin, some new achievements are yielded. in this regards, the first occurrence of Bispiraloconulus serbicus Schlagintweit, Bucur & Sudar in close association with Torremiroella hispanica Brun & canerot is reported for the first time from the upper Barremian of Kopet-dagh sedimentary basin (ne iran). the biostratigraphic investigations were carried out on a 197.5 m thick gelian stratigraphic succession cropping out along the tirgan Formation located 35 km southwest of Shirvan town. this study reviews the palaeogeographical distribution and age of Bispiraloconulus serbicus Schlagintweit, Bucur & Sudar and Torremiroella hispanica Brun & canerot along the northern tethyan margins and extends its pal?eobiogeographical existence.