Conodont Fauna And Biostratıgraphy Of The Early-Middle Devonian Units In Beykoz, Şile And Kurtdoğmuş Areas, İstanbul, Turkey

Conodont faunas defining the delta-pesavis zones (upper Lochkovian, Lower Devonian) from Beykoz and Karamandere sections of the İstinye Formation (the Yumrukaya Group) and the laticostatus, serotinus, patulus and partitus zones (upper Emsian-lower Eifelian, Lower-Middle Devonian) from Büyükdere and Kokarpınar sections of the Kozyatağı member of the Kartal Formation were obtained. A total of 22 species/subspecies were described belonging to the genera Neopanderodus (2), Icriodus (8), Pelekysgnathus (1), Lanea (1), Polygnathus (4), Ozarkodina (2), Pseudooneotodus (2) and Belodella (2).