Bispiraloconulus serbicus Schlagintweit, Bucur & Sudar, 2019 (arborescent benthic foraminifer) and Torremiroella hispanica Brun & Canérot, 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 & Canérot 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 & Canérot along the northern Tethyan margins and extends its palaeobiogeographical existence.

Mikropaleontološka istraživanja donjokredne sukcesije formacije Tirgan u Kopet-Dag sedimentacionom basenu (SI Iran) su pružila nove podatke. S tim u vezi, prvi put je u sedimentima Gornjeg Barema dokumentovan Bispiraloconulus serbicus Schlagintweit, Bucur& Sudar u asocijaciji sa Torremiroella hispanica Brun & Canérot. Biostratigrafska istraživanja su obavljena na stratigrafskom profilu Gelian (Formacija Tirgan) ukupne debljine 197,5 m koji je otkriven 35 km jugozapadno od grada Shirvan. U radu je data revizija paleogeografskog rasprostranjenja i starosti foraminifera Bispiraloconulus serbicus Schlagintweit, Bucur & Sudar i Torremiroella hispanica Brun & Canérot duž severnogo boda Tetisa.