RCMNS Interim Colloquium 2016 Croatian Geological Society Limnogeology Workshop

20–24 May 2016, Zagreb

Lake – Basin – Evolution

Stratigraphy, Geodynamics, Climate and Diversity of Past and Recent Lacustrine Systems

Program & Abstracts

Hrvatsko geološko društvo / Croatian Geological Society Zagreb 2016 ISBN 978-953-95130-9-0

Abstracts • SESSION B. PALEOBIOLOGY

Krstić, N. 1985. Ostracoden im Pannonien der Umge- (Sarmatian) this locality was characterized by bung von Belgrad. In: Papp, A. (Ed.), Chronostrati- lacustrine-swampy paleohabitat. graphie und Neostratotypen, Miozän der Zentralen Paratethys VII. M6, Pannonien. Akadémiai Kiadó, Biton, R., Geffen, E., Vences, M., Cohen, O., Bailon, Budapest, 103–143. S., Rabinovich, R., Malka, Y., Oron, T., Boistel, R., Brumfeld, V., Gafny, S. 2013. The rediscovered Hula painted is a living fossil. Nature Communica- gigantea (Anura, ) from tions 4: 1959. the Middle Miocene of Lake Vračević Jovanović, M., Djurić, D. 2005. Fosilna herpetofauna (Serbia) P sela Vračević kod manastira Bogovađa (Centralna Srbija). Zbornika radova za 14 Kongres geologa SCG (CD izdanje). Đurić, D. Roček, Z. 1994. and distribution of Ter- tiary Discoglossids (Anura) of the Latonia v. Natural History Museum, Njegoševa 51, 11000 Bel- MEYER, 1843. Geobios 27 (6): 717–751. grade, Serbia Venczel, M. & Stiuca, E. 2008. Late middle Miocene The Middle Miocene sediments of Vračević and squamate reptiles from Taut, Ro- mania. Geodiversitas 30 (4): 731–763. yielded rich fossil vertebrates association. The herpetological remains at this site were partial- ly described in an earlier paper (Jovanović & Đurić, 2005). Presence of frog Latonia at A minute ostracod (Crustacea) from the Vračević was the first record in Serbia. This ge- Miocene Solimões Formation (western nus of large belongs to a family Alytidae Amazonia, Brazil) – Evidence for marine (Discoglossinae). Until recently Latonia was incursions? considered to be an extinct genus present from late to Pleistocene. (Biton et al. 2013) Gross, M.1, Piller, W.E.2 believe that the rediscovered (, ) is actually a living fossil 1Department for Geology and Palaeontology, Univer- named Latonia nigriventer. salmuseum Joanneum, Weinzöttlstrasse 16, 8045 The fossil remains include disarticulated Graz, Austria 2 and highly fragmented jaw bones and axial Institute of Earth Sciences, University of Graz, NAWI skeleton. The poor state of preservation made Graz, Heinrichstrasse 26, 8010 Graz, Austria identification very difficult. The maxilla frag- ments lack secondary ornamentation which as A huge wetland (the ‘Pebas system’; Hoorn et L. ragei. However ornamentation may be ab- al., 2010) covered western Amazonia during the sent in younger individuals of L. gigantea Miocene, hosting a highly diverse and endemic (Roček, 1994). Due to the fact that remains aquatic fauna (e.g., molluscs, ostracods). One of have the features of a smaller individual, they the most contentious issues concerns the exist- were identified as Latonia cf. gigantea. ence, potential pathways and effects of marine Latonia is a representative of periaquatic incursions on this ecosystem. Palaeontological Amphibians (Venczel & Stiuca, 2008). It is found evidences (body fossils) are still rare. The find- in humid habitats near water bodies, as is the ing of a presumably marine ostracod species case with the species L. nigriventer. Presence of (Pellucistoma curupira Gross, Ramos & Piller, this species in sediments of Vračević leads to 2015) in the upper middle Miocene Solimões conclusion that during the Middle Miocene Formation initiated a taxonomic, ecological and biogeographic review of the genus Pellucisto-

25 RCMNS IC 2016 Lake - Basin - Evolution – Abstract & Program Volume ma. We demonstrated that this basically marine 2010. Amazonia Through Time: Andean Uplift, Cli- (sublittoral, euhaline), subtropical-tropical tax- mate Change, Landscape Evolution, and Biodiversity. on is biogeographically confined to the Ameri- Science, 330, 927–931. cas. The biogeographic distribution of Pellu- cistoma largely depends on geographic, thermal and osmotic barriers (e.g., land bridges, deep Lacustrine Karpatian to lowermost Badeni- and/or cold waters, sea currents, salinity). We an ostracods and palynomorphs from assume an Oligocene/early Miocene, Caribbean Sjeničak section (Croatia) P origin for Pellucistoma and outline the dispersal of hitherto known species up to the Holocene. Hajek-Tadesse, V.1, Bakrač, K.1, Mandic, O.2, P. curupira is dwarfed in comparison to all other Kovačić, M.3 species of this genus and extremely thin- shelled. This is probably related to poorly oxy- 1Croatian Geological Survey,Department of Geology, genated waters and, in particular, to strongly Sachsova 2, 10 000 Zagreb, Croatia reduced salinity. The associated ostracod fauna 2Geological-Paleontological Department, Natural (dominated by the eurypotent Cyprideis and a History Museum Vienna, Burgring 7, 1010 Wien, few, also stunted ostracods of possibly marine Austria ancestry) supports this claim. Geochemical 3University of Zagreb, Faculty of Science, Department analyses (δ18O, δ13C) on ostracod valves fur- of Geology, 10 000 Zagreb, Croatia nished constantly very light values, indicative for a freshwater setting. These observations In Croatia the pre-Badenian lacustrine, alluvial, point to a successful adaptation of P. curupira fluvial and deltaic deposits occur in the Sava to freshwater conditions and therefore do not and Drava depressions, in their sub- signify the presence of marine waters. P. depressions, as well as on the inselbergs be- curupira shows closest affinities to Caribbean tween them. The Sjeničak section is located in species. We hypothesise that Pellucistoma the Karlovac sub-depression which, according reached northern South America (Llanos Basin) to Mandic et al. (2012) could represent a zone during marine incursions in the early Miocene. independent from the Sava depression. It is While larger of marine origin (e.g., fish- related to the intra-mountainous basin of the es, dolphins, manatees) migrated actively into Dinaride Lake System. the Pebas wetland via fluvial connections, small The present work is a continuation of an biota (e.g., P. curupira) were phoretically earlier study of the Sjeničak section (Mandic et freighted and developed freshwater tolerance al., 2012). According to Mandic et al. (2012) over long time scales. lacustrine deposits from the Karlovac sub- depression are characterized by abundant Gross, M., Ramos, M.I.F. & Piller, W.E. 2015. A mi- dreissenid bivalve accumulations of the Illyrian nute ostracod (Crustacea: Cytheromatidae) from the Bioprovince type. Weighted mean Ar/Ar age for Miocene Solimões Formation (western Amazonia, the Sjeničak ash is 16.00 ± 0.09 Ma (De Leeuw Brazil) – Evidence for marine incursions? Journal of et al., 2012; Mandic et al., 2012). This age indi- Systematic Palaeontology, DOI: cate that the Southern Pannonian Basin conti- 10.1080/14772019.2015.1078850. nental phase lasted at least 2 Ma (Mandic et al., Hoorn, C., Wesselingh, F.P., Steege, H. ter, Bermudez, 2012) and that it coincides with the deposition M.A., Mora, A., Sevink, J., Sanmartín, I., Sanchez- of lacustrine sediments with similar fauna in the Meseguer, A., Anderson, C.L., Figueiredo, J.P., Jara- more interior parts of the Dinarides. millo, C., Riff, D., Negri, F.R., Hooghiemstra, H., For the present study two samples were Lundberg, J., Stadler, T., Särkinen, T. & Antonelli, A. analyzed from the Sjeničak section; a clayey

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