@article{MTMT:34128741, title = {The Rhabdodontidae (Dinosauria, Ornithischia), an enigmatic dinosaur group endemic to the Late Cretaceous European Archipelago}, url = {https://m2.mtmt.hu/api/publication/34128741}, author = {Augustin, FJ. and Ősi, Attila and Csiki-Sava, Z}, doi = {10.3897/fr.26.108967}, journal-iso = {FOSS REC}, journal = {FOSSIL RECORD: AN INTERNATIONAL JOURNAL OF GEOSCIENCE}, volume = {26}, unique-id = {34128741}, issn = {2193-0066}, abstract = {The Rhabdodontidae was one of the most important dinosaur groups inhabiting the Late Cretaceous European Archipelago. Currently, the clade comprises nine species within six genera, which have been found in southern France, northern Spain, eastern Austria, western Hungary and western Romania, ranging from the Santonian to the late Maastrichtian. Phylogenetic analyses consistently place the Rhabdodontidae at the very base of the iguanodontian radiation, whereas the in-group relationships of rhabdodontids are relatively poorly understood; nevertheless, the clade seems to have had a rather complicated biogeographical history. Generally, rhabdodontids were small- to medium-sized, probably habitually bipedal herbivores, characterised by a rather stocky build and a comparatively large, triangular skull. Several lines of evidence suggest that they were presumably gregarious animals, as well as selective browsers that fed on fibrous plants and occupied different ecological niches than sympatric herbivorous dinosaur clades. Moreover, the sympatry of at least two rhabdodontid taxa was rather common and can be explained, at least in some instances, by niche partitioning. While rhabdodontids disappeared prior to the K/Pg extinction event in Western Europe, they survived close to the end of the Cretaceous in Eastern Europe, where they were amongst the last non-avian dinosaurs still present before the end of the Cretaceous. In this paper, we provide an overview of the rhabdodontid taxonomic history, diversity, phylogenetic relationships and palaeobiogeographic history, as well as palaeoecology and extinction. In addition, we also highlight still open questions on each of these topics and suggest potential future research directions.}, year = {2023}, eissn = {1860-1014}, pages = {171-189}, orcid-numbers = {Augustin, FJ./0000-0002-7787-5601; Ősi, Attila/0000-0003-2967-997X} } @CONFERENCE{MTMT:34145417, title = {Another Fountain of (Palaeontological) Wealth – preliminary report on a new fossiliferous locality from Fântânele, Vălioara (Hațeg Basin)}, url = {https://m2.mtmt.hu/api/publication/34145417}, author = {Csiki-Sava, Z. and Budai, S. and Magyar, János and Botfalvai, Gábor}, booktitle = {Abstract Book, Fourteenth Romanian Symposium on Palaeontology}, unique-id = {34145417}, year = {2023}, pages = {41-42}, orcid-numbers = {Botfalvai, Gábor/0000-0002-5479-9036} } @article{MTMT:33295571, title = {Multi-proxy dentition analyses reveal niche partitioning between sympatric herbivorous dinosaurs}, url = {https://m2.mtmt.hu/api/publication/33295571}, author = {Ősi, Attila and Barrett, PM. and Evans, AR. and Nagy, András Lajos and Szenti, Imre and Kukovecz, Ákos and Magyar, János and Segesdi, Martin and Gere, Kinga and Jó, Viviána}, doi = {10.1038/s41598-022-24816-z}, journal-iso = {SCI REP}, journal = {SCIENTIFIC REPORTS}, volume = {12}, unique-id = {33295571}, abstract = {Dentitions of the sympatric herbivorous dinosaurs Hungarosaurus (Ankylosauria, Nodosauridae) and Mochlodon (Ornithopoda, Rhabdodontidae) (Santonian, Hungary) were analysed to investigate their dietary ecology, using several complementary methods—orientation patch count, tooth replacement rate, macrowear, tooth wear rate, traditional microwear, and dental microwear texture analysis (DMTA). Tooth formation time is similar in Hungarosaurus and Mochlodon , and traditional and DMTA microwear features suggest low-browsing habits for both taxa, consistent with their inferred stances and body sizes. However, Mochlodon possesses a novel adaptation for increasing dental durability: the dentine on the working side of the crown is double the thickness of that on the balancing side. Moreover, crown morphology, enamel thickness, macrowear orientation, and wear rate differ greatly between the two taxa. Consequently, these sympatric herbivores probably exploited plants of different toughness, implying dietary selectivity and niche partitioning. Hungarosaurus is inferred to have eaten softer vegetation, whereas Mochlodon likely fed on tougher material. Compared to the much heavier, quadrupedal Hungarosaurus , the bipedal Mochlodon wore down more than twice as much of its crown volume during the functional life of the tooth. This heavy tooth wear might correlate with more intensive food processing and, in turn, could reflect differences in the metabolic requirements of these animals.}, year = {2022}, eissn = {2045-2322}, orcid-numbers = {Ősi, Attila/0000-0003-2967-997X; Kukovecz, Ákos/0000-0003-0716-9557} } @article{MTMT:31955461, title = {‘X’ marks the spot! Sedimentological, geochemical and palaeontological investigations of Upper Cretaceous (Maastrichtian) vertebrate fossil localities from the Vălioara valley (Densuş-Ciula Formation, Hațeg Basin, Romania)}, url = {https://m2.mtmt.hu/api/publication/31955461}, author = {Botfalvai, Gábor and Csiki-Sava, Z and Kocsis, L and Albert, Gáspár and Magyar, János and Bodor, Emese Réka and Ţabără, D and Ulyanov, A and Makádi, László}, doi = {10.1016/j.cretres.2021.104781}, journal-iso = {CRETACEOUS RES}, journal = {CRETACEOUS RESEARCH}, volume = {123}, unique-id = {31955461}, issn = {0195-6671}, year = {2021}, eissn = {1095-998X}, orcid-numbers = {Botfalvai, Gábor/0000-0002-5479-9036; Csiki-Sava, Z/0000-0001-7144-0327; Albert, Gáspár/0000-0002-1723-8328; Magyar, János/0000-0002-2072-0174; Bodor, Emese Réka/0000-0003-3894-2506; Ulyanov, A/0000-0001-7047-6862; Makádi, László/0000-0001-6829-0241} } @article{MTMT:3168501, title = {Taphonomical and palaeoecological investigation of the Late Cretaceous (Maastrichtian) Tuştea vertebrate assemblage (Romania; Haţeg Basin) - insights into a unique dinosaur nesting locality}, url = {https://m2.mtmt.hu/api/publication/3168501}, author = {Botfalvai, Gábor and Csiki-Sava, Z and Grigorescu, D and Vasile, Ş}, doi = {10.1016/j.palaeo.2016.12.003}, journal-iso = {PALAEOGEOGR PALAEOCL}, journal = {PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY}, volume = {468}, unique-id = {3168501}, issn = {0031-0182}, year = {2017}, eissn = {1872-616X}, pages = {228-262}, orcid-numbers = {Botfalvai, Gábor/0000-0002-5479-9036} } @article{MTMT:3170329, title = {Morphometry, microstructure and wear pattern of neornithischian dinosaur teeth from the Upper Cretaceous Iharkút locality (Hungary)}, url = {https://m2.mtmt.hu/api/publication/3170329}, author = {Virág, Attila and Ősi, Attila}, doi = {10.1002/ar.23592}, journal-iso = {ANAT REC}, journal = {ANATOMICAL RECORD}, volume = {300}, unique-id = {3170329}, issn = {1932-8486}, year = {2017}, eissn = {1932-8494}, pages = {1439-1463}, orcid-numbers = {Virág, Attila/0000-0002-5530-0065; Ősi, Attila/0000-0003-2967-997X} } @article{MTMT:2920186, title = {The East Side Story - Transylvanian latest Cretaceous continental vertebrate record and its implications for understanding the Cretaceous–Paleogene Boundary events.}, url = {https://m2.mtmt.hu/api/publication/2920186}, author = {Csiki-Sava, Z and Vremir, M and Vasile, S and Brusatte, SL and Dyke, Gareth and Naish, D and Norell, MA and Totoianu, R}, doi = {10.1016/j.cretres.2015.09.003}, journal-iso = {CRETACEOUS RES}, journal = {CRETACEOUS RESEARCH}, volume = {57}, unique-id = {2920186}, issn = {0195-6671}, abstract = {The lastest Cretaceous continental vertebrate faunas of the wider Transylvanian area figured prominently in discussions concerning the Cretaceous-Paleogene Boundary (K-PG) events when they were first described by Nopcsa between 1897 and 1929, because they were assumed to be late Maasrichtian in age. Subsequently their age was reconsidered as early Maasrichtian, and were thus regarded of lesser importance in understanding the K-PG boundary events in Europe and worldwide. Moreover, Transylvanian continental vertebrate assemblages (the so-called 'Hateg Island' faunas )were often lumped together as a temporally restriced assemblage with a homogenous taxonomic composition. Recent fossil discoveries and more precise dating techniques have considerably expanded knowledge of the Transylvanian vertebrate assemblages, their ages, and their evolution. A Synthesis of the avilable stratigraphic data allows development of the first comprehensive chronostratigraphic framework of the latest Cretaceous Transylvanian vertebrates. According to these new data, expansion of continental habitats and emergence of their vertebrate faunas started locally during the latter part of the late Campanian, and these faunas continued up to the second half of the Maastrichtian. During this time, long-term faunal stasis appears to have characterized the Transylvanian vertebrate assemblages, which is different from the striking turnovers recorded in western Europe during the same time interval. This suggests that there was no single 'Europe-wide' pattern of latest Cretaceous continental vertebrate evolution. Together, the available data shows that dinosaurs and other vertebrates were relatively abundant and diverse until at least ca. 1 million years before the K-Pg boundary, and is therefore consistent with the hypothesis of a sudden extinction, altough this must be tested with future discoveries and better age constraints and correlations.}, year = {2016}, eissn = {1095-998X}, pages = {662-698} } @article{MTMT:2069911, title = {Phylogeny, Histology and Inferred Body Size Evolution in a New Rhabdodontid Dinosaur from the Late Cretaceous of Hungary}, url = {https://m2.mtmt.hu/api/publication/2069911}, author = {Ősi, Attila and Prondvai, Edina and Butler, R and Weishampel, DB}, doi = {10.1371/journal.pone.0044318}, journal-iso = {PLOS ONE}, journal = {PLOS ONE}, volume = {7}, unique-id = {2069911}, issn = {1932-6203}, abstract = {Background: Rhabdodontid ornithopod dinosaurs are characteristic elements of Late Cretaceous European vertebrate faunas and were previously collected from lower Campanian to Maastrichtian continental deposits. Phylogenetic analyses have placed rhabdodontids among basal ornithopods as the sister taxon to the clade consisting of Tenontosaurus, Dryosaurus, Camptosaurus, and Iguanodon. Recent studies considered Zalmoxes, the best known representative of the clade, to be significantly smaller than closely related ornithopods such as Tenontosaurus, Camptosaurus, or Rhabdodon, and concluded that it was probably an island dwarf that inhabited the Maastrichtian Hat¸eg Island. Methodology/Principal Findings: Rhabdodontid remains from the Santonian of western Hungary provide evidence for a new, small-bodied form, which we assign to Mochlodon vorosi n. sp. The new species is most similar to the early Campanian M. suessi from Austria, and the close affinities of the two species is further supported by the results of a global phylogenetic analysis of ornithischian dinosaurs. Bone histological studies of representatives of all rhabdodontids indicate a similar adult body length of 1.6–1.8 m in the Hungarian and Austrian species, 2.4–2.5 m in the subadults of both Zalmoxes robustus and Z. shqiperorum and a much larger, 5–6 m adult body length in Rhabdodon. Phylogenetic mapping of femoral lengths onto the results of the phylogenetic analysis suggests a femoral length of around 340 mm as the ancestral state for Rhabdodontidae, close to the adult femoral lengths known for Zalmoxes (320–333 mm). Conclusions/Significance: Our analysis of body size evolution does not support the hypothesis of autapomorhic nanism for Zalmoxes. However, Rhabdodon is reconstructed as having undergone autapomorphic giantism and the reconstructed small femoral length (245 mm) of Mochlodon is consistent with a reduction in size relative to the ancestral rhabdodontid condition. Our results imply a pre-Santonian divergence between western and eastern rhabdodontid lineages within the western Tethyan archipelago.}, year = {2012}, eissn = {1932-6203}, orcid-numbers = {Ősi, Attila/0000-0003-2967-997X} }