Upper Permian ostracode assemblage from the Jadar Block (Vardar zone, NW Serbia)

Sylvie Crasquin,Divna Jovanovic,Tea Kolar-Jurkovsek,Milan Sudar

doi:10.2298/gabp1071023c

Abstract

Ostracodes from the Changhsingian (latest Permian age) in the uppermost part of the ?Bituminous Limestone? Formation of the Komiric Section in NW Serbia (Jadar Block, Vardar Zone) are described and illustrated. Three new species of ostracodes are introduced: Basslerella jadarensis n. sp., Acratia serbianella n. sp., and Knoxiella vardarensis n. sp. The ostracode assemblage, together with conodonts and foraminifers, is the first record of the youngest Late Permian age microfaunas from Serbia and from the central part of the Balkan Peninsula.

Highlights

The Permian and Triassic deposits widely distributed in the Jadar Block area (NW Serbia) have been the subject of numerous geological investigations
Sediments belonging to the Permian–Triassic (P–T) boundary interval, represented by shallow-water marine carbonates with different fossil associations and specific characteristics of the depositional environments, are unique in Serbia
Unlike the Vardar Zone Western Belt, the absence of post-Early Jurassic sediments, ultramafites, ophiolitic mélange, and Cretaceous flysch development is evident in the Jadar Block (FILIPOVIĆ et al 2003)

Summary

Introduction

The Permian and Triassic deposits widely distributed in the Jadar Block area (NW Serbia) have been the subject of numerous geological investigations Among these strata, sediments belonging to the Permian–Triassic (P–T) boundary interval, represented by shallow-water marine carbonates with different fossil associations and specific characteristics of the depositional environments, are unique in Serbia. The main interest was to confirm the presence of conodonts in Palaeozoic and Triassic sediments, especially in the P–T interval beds With these intensive geological studies of NW Serbia, the authors intended to document palaeontological, biostratigraphical, and sedimentological data in order to refine the existing lithostratigraphical definitions. They occur together with conodonts and foraminifers in the uppermost part of the “Bituminous Limestone” Formation from the lower part of the section (SUDAR et al 2007a, NESTELL et al 2009)

Geological setting

Komirić Section

Ostracode fauna

Comments on the ostracode fauna

The research of SYLVIE CRASQUIN is supported by CNRS