The The extinct diatom species Thalassiosira rugulosa (HAJÓS) OGNJANOVA‑RUMENOVA – typification and biostratigraphic significance

  • Nadja Ognjanova-Rumenova Bulgarian Academy of Sciences, Geological Institute, Department of Paleontology, Stratigraphy and Sedimentology, Acad. G. Bonchev-Street Build. 24, 1113 Sofia, Bulgaria. https://orcid.org/0000-0002-7019-431X
  • Ljupko M. Rundić University of Belgrade, Faculty of Mining and Geology, Đušina 7, 11000 Belgrade, Serbia. https://orcid.org/0000-0002-1598-9603
Keywords: Bacillariophyta, Thalassiosira rugulosa comb. nov., fine morphology, typification, biostratigraphy, Fruška Gora, Serbia

Abstract

Thalassiosira rugulosa (HAJÓS) OGNJANOVA‐RUMENOVA is described and typified as a new fossil diatom combination belonging to the plicated group of the genus Thalassiosira Cl. Until now, these specimens had been identified in a series of biostratigraphic studies conducted in Hungary, Croatia, Serbia, and Romania under the name Coscinodiscus rugulosus Hajós. The presence of loculate areolae ‐ open to the outside by foramina and internally occluded byslightly raised cribrum, as well as two types of processes, both rimoportula and fultoportulae, confirms its assignment to the genus Thalassiosira Cl.

Published
2026-07-23
How to Cite
Ognjanova-Rumenova, N. and Rundić, L. (2026) “The The extinct diatom species Thalassiosira rugulosa (HAJÓS) OGNJANOVA‑RUMENOVA – typification and biostratigraphic significance”, Geološki anali Balkanskoga poluostrva, 87(1), pp. 35-42. Available at: https://gabp.rgf.rs/index.php/gabp/article/view/GABP260417002O (Accessed: 26July2026).
Issue
Vol 87 No 1 (2026): Geološki anali Balkanskoga poluostrva
Section
Original Scientific Paper

Copyright (c) 2026 Geološki anali Balkanskoga poluostrva

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