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Lamara Maisuradze, Kakhaber Koiava and Silvia Spezzaferri

Taxonomic revision and new species/subspecies of Middle-Late Miocene (Bessarabian) miliolids of the Family Hauerinidae Schwager from Georgia — Eastern Paratethys

Three new miliolid taxa from Bessarabian sediments from Georgia (Eastern Paratethys) are described following the classification of Łuczkowska (1972), which has never been used before by ex-Soviet micropaleontologists. They are: Varidentella luczkowskae; Varidentella reussi (Bogdanowicz) subsp. costulata; and Affinetrina voloshinovae (Bogdanowicz) subsp. eldarica. This classification takes into account the morphology of the aperture and the shape and size of teeth as criteria to distinguish the species. This study contributes important criteria which will help to unify the taxonomical inconsistencies between the Eastern, Central and Western Paratethyan miliolids.

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Aynur Hakyemez, Nazire Özgen-Erdem and Özgen Kangal

Abstract

Planktonic and benthic foraminifera are described from the Middle Eocene-Lower Miocene successions in the Sivas Basin, Central Anatolia. An integrated foraminiferal zonation provides new age assignments in terms of a great number of taxa for the studied sections. Four biostratigraphical intervals are first recorded based on the concurrent ranges of sporadically occurring but well preserved planktonic foraminiferal assemblages. The first interval characterized by the co-occurrences of Acarinina bullbrooki, Truncorotaloides topilensis and Turborotalia cerroazulensis is referable to the E11 Zone of late Lutetian–early Bartonian. An assemblage yielding Paragloborotalia opima accompanied by Globigerinella obesa forms a basis for the late Chattian O5 Zone. The successive interval corresponds to the late Chattian O6 Zone indicated by the presence of Globigerina ciperoensis and Globigerinoides primordius along with the absence of Paragloborotalia opima. The early Aquitanian M1 Zone can be tentatively defined based mainly on the assemblage of Globigerina, Globigerinella, Globoturborotalita and Tenuitella. The biostratigraphical data obtained from the benthic foraminifera assign the studied sections to the SBZ 21–22, SBZ 23 and SBZ 24 ranging in age from Rupelian to Aquitanian. The SBZ 23 and 24 are well constrained biozones by the occurrences of Miogypsinella complanata and Miogypsina gunteri, respectively, whereas the SBZ 21–22 defined by nummulitids and lepidocylinids in the Tethyan Shallow Benthic Zonation is characterized dominantly by peneroplids, soritids and miliolids in the studied sections. Benthic foraminiferal assemblages suggest different paleoenvironments covering lagoon, algal reef and shallow open marine whereas planktonic foraminifera provides evidence for relatively deep marine settings on the basis of assemblages characterized by a mixture of small-sized simple and more complex morphogroups indicative for intermediate depths of the water column.

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Baba Senowbari-Daryan and Michael Link

Foraminifere aus dem Karn von Sizilien. Geol. Bl. NE-Bayern , 43, 1–3, 181–200. Senowbari-Daryan B. 2016: Upper Triassic Miliolids of “ Cucurbita -group”: Aspects of the systematic classification. Jb. Geol. B.-A. Wien 156, 1–4, 187–215. Senowbari-Daryan B. & Abate B. 1986: Zur Paläontologie, Fazies und Stratigraphie der Karbonate innerhalb der “Formazione Mufara” (Obertrias, Sizilien). Natur. sicil. Ser. IV, 10, 59–104. Senowbari-Daryan B. & Cacciatore M. S. 2009: The genus Palaeolituonella (Foraminifer) and description of Palaeolituonella angulata

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Wojciech Majewski

, summer 1982. Polish Polar Research 9: 121-132. Schmiedl G. and Mackensen A. 1993. Cornuspiroides striolatus (Brady) and C. rotundus nov. spec.: Large Miliolid Foraminifera from Arctic and Antarctic Oceans. Journal of Foraminiferal Research 23: 221-230. Shevenell A. W. and Kennett J. P. 2002. Antarctic Holocene climate change: A benthic foraminiferal stable isotope record from Palmer Deep. Paleoceanography 17: 1-13. http://dx.doi.org/10.1029/2000PA000596 Sinniger F., Lecroq B., Majewski

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Simina Dumitriţa Dumitriu, Sergiu Loghin, Zofia Dubicka, Mihaela Carmen Melinte-Dobrinescu, Jolanta Paruch-Kulczycka and Viorel Ionesi

-43. DeCelles P.G. & Giles K.A. 1996: Foreland basin systems. Basin Res. 8, 105-123. Didkowski V.I. 1961: Neogene miliolids from the south-western part of the Russian Platform (Quinqueloculina and Triloculina genera) [Miliolidi neogenovikh pivdeno-zakhidnoi chastini rosiiskoi platformi (Rodi: Quinqueloculina to Triloculina)]. Gn. An. USRS, ser. stratigrafii to paleontologii, 39. Filipescu S. 1996: Stratigraphy of the Neogene from the Western Border of the Transylvanian Basin. Studia Universitatis Babeş- Bolyai XLI, 2, 3