The age of the brachiopod limestones from Guca, western Serbia

Abstract

The asymmetric rhynchonellide brachiopod Cyclothyris? globata (ARNAUD, 1877) has a large distribution in the Coniacian, Santonian and Campanian outcrops of the western Tethys. The species has also been identified in Guca, (Vardar Zone, western Serbia), where it occurs together with the capillate terebratuloid ?Terebratula? sp. (gen. et sp. nov.). In addition to Serbia, this brachiopod association is found in many localities of northeastern Bulgaria (Shumen Formation). In older literature, in Romania and Bulgaria, ?Terebratula? sp. (gen. et sp. nov.) was confused with the Late Maastrichtian Terebratulina striata (WAHLENBERG, 1821). The present microfaunal study based on planktonic foraminifera showed that the age of the beds with Cyclothyris? globata and ?Terebratula? sp. (gen. et sp. nov.) in Guca may be dated as Lowermost Campanian, i.e., the Santonian/Campanian boundary.

Deciphering the geodynamic evolution of the Dinaric orogen through the study of the ‘overstepping’ Cretaceous successions

“…The phases of tectonically induced regressions are interpreted after the comparison between the stratigraphy of the Cretaceous successions in the Dinarides and the global eustatic curve (Haq, 2014) and relative sea level oscillations recorded in the Tithonian to Cenomanian shallow-water carbonates of the AdCP (Husinec & Jelaska, 2006). New stratigraphic and age data presented in this work integrate the following literature: Adriatic carbonatic platform (Dinara Mountain section) after Vlahović et al (2005 with references); Vranduk and Ugar formations after Mikes et al (2008 with references); Pogari Group after Blanchet et al (1970), Blanchet (1975) and Hrvatović (2006); Mokra Gora Group after (Ba-Struganik area) Vishnevskaya et al (2009), Djerić et al (2009) and Bragina et al (2014) (Mokra Gora area) Pejović & Radoičić (1971), Olujić et al (1987), Radoičić & Schlagintweit (2007) and Banjac et al (2007); Guča Group and Ljig-Brus-Kosovska-Mitrovica flysch afterćirić (1958), Dimitrijević & Dimitrijević (1987), Radoičić et al (2010), Zelic et al (2010) and Chiari et al (2011). Chronostratigraphic chart after Cohen et al (2013).…”

Biostratigraphy of the Kazhdumi Formation (Albian), northeast of Shiraz, Zagros Basin (SW of Iran)

“…Radoičić and Schlagintweit (2007) reported this taxon from the Mid-Albian through the Early Cenomanian strata in Mokra Gora (west of Serbia). Radoičić et al (2010) also distinguished this species in the Late Albian sequence in Guča (western Serbia). Ghanem et al (2012) documented biostratigraphic data in the southern Palmyrides (Syria).…”

A new asymmetric rhynchonellide from the Cretaceous of the Eastern Prebetic (Southeastern Spain)

“…contorta (d'Orbigny, 1847) and Rhynchonella difformis d'Orbigny, 1847, were reviewed at the Muséum National d'Histoire Naturelle (MNHN, Paris, France). Specimens of Cyclothyris globata (Arnaud, 1877) were examined in the Arnaud Collection at the Université Pierre et Marie Curie VI (UPMC, Paris, France) and in the Radulović/ Motchurova-Dekova collection (Radulović & Motchurova-Dekova, 2002;Radoičić et al, 2010) at the Univerzitet u Beogradu, Rudarsko-Geološki Fakultet (RGF, Belgrade, Serbia). Additionally, Rhynchonella claudicans Coquand, 1879, R. globata, and R. vesicularis Coquand, 1860, were reviewed in the Coquand Collection (1860, 1862, 1879 at the Magyar Bányászati és Földtani Szolgálat (MBFS, Budapest, Hungary).…”

“…Several Cretaceous asymmetrical species have been placed into this genus, which is frequently reported from European basins, but with controversial taxonomic attributions. The correct taxonomic classification, and therefore the stratigraphical range and the geographical distribution of the asymmetrical species of Cyclothyris were widely discussed (e.g., Muñoz, 1985Muñoz, , 1994Gaspard, 1991;Motchurova-Dekova, 1995Radulović & Motchurova-Dekova, 2002;Radoičić et al, 2010;Berrocal-Casero et al, 2017, 2020a, 2020b). Among them, C. difformis is probably the most prolific taxon.…”