Patrice Moix

Jurassic and Cretaceous radiolarian assemblages from the Bornova mélange in northern Karaburun Peninsula (western Turkey) and its connection to the İzmir–Ankara mélanges

Two large blocks of red bedded chert identified within the Late Cretaceous–Paleocene Bornova mélange in northern Karaburun Peninsula yielded Jurassic (late Bathonian–early Oxfordian) and Cretaceous (middle–late Albian) radiolarian assemblages. These new data confirm the correlation of the Bornova mélange with the Bornova Flysch Zone (BFZ) and the İzmir–Ankara mélanges. A review of all previously obtained ages in chert blocks of the BFZ and the İzmir–Ankara mélanges is provided in order to strengthen this correlation.

Carnian (Late Triassic) ostracods from the Sorgun Ophiolitic Mélange (Southern Turkey): Taxonomy, palaeoenvironment, and evidence of predation

The Mersin Ophiolitic Complex is situated in southern Turkey and contains the relics of the Palaeotethys and Neotethys Oceans and of the Huglu-Pindos basin. The succession exposed at the Tavusçayiri Block has been intensely studied but ostracods are still poorly documented. This paper illustrates and discusses the ostracods extracted from a radiolarian-rich limestone of the lower Tuvalian Spongotortilispinus moixi radiolarian Zone (Carnian, Late Triassic) intercalated with thick green tuffs. The moderately abundant assemblage (40 specimens) is composed of 29 species, 16 genera of seven families, including one new species: Bairdiacypris sorgunensis Forel sp. nov. This assemblage points to a moderately shallow subtidal environment submitted to short-lived environmental instabilities. In regards to the slightly older ostracods recently reported from the Tavusçayiri Block, the present record illustrates an upwards shallowing trend for the Carnian succession. All the taxa found are of typical MesozoicCenozoic affinity, in contrast to the slightly older assemblage from the Julian of the Tavusçayiri Block (Kilek section), which also include Palaeozoic taxa. This different pattern could relate either to the disappearance of Palaeozoic taxa during the intervening interval or to their survival only in relatively deeper waters. Finally, we also report the oldest known record of a boring trace on the surface of an ostracod valve, probably of predatory origin. It represents the first evidence of predation on micro-benthos in the Triassic and is in line with several recent studies attesting the establishment of boring predation in the Late Triassic. Marie-Béatrice Forel. MNHN-CNRS-SU, Muséum national d’Histoire naturelle, 8 rue Buffon (CP38), 75005 Paris, France. marie-beatrice.forel@mnhn.fr Péter Ozsvárt. MTA-MTM-ELTE, Research Group for Paleontology, P.O. Box 137, H 1431 Budapest, Hungary. ozsvart.peter@nhmus.hu Patrice Moix. Rue de la Combe 55, 1969 Eison, Switzerland. patricemoix@gmail.com http://zoobank.org/BDBCC335-201C-4197-949A-81747E64B3B8 Forel, Marie-Béatrice, Ozsvárt, Péter, and Moix, Patrice. 2018. Carnian (Late Triassic) ostracods from the Sorgun Ophiolitic Mélange (Southern Turkey): Taxonomy, palaeoenvironment, and evidence of predation. Palaeontologia Electronica 21.2.26A 1-23. https:// doi.org/10.26879/852 palaeo-electronica.org/content/2018/2262-carnian-ostracods-from-turkey Copyright: July 2018 Paleontological Society. This is an open access article distributed under the terms of Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0), which permits users to copy and redistribute the material in any medium or format, provided it is not used for commercial purposes and the original author and source are credited, with indications if any changes are made. creativecommons.org/licenses/by-nc-sa/4.0/ FOREL, OZSVÁRT, & MOIX: CARNIAN OSTRACODS FROM TURKEY