TY - JOUR AU - Ősi, Attila TI - The evolution of jaw mechanism and dental function in heterodont crocodyliforms JF - HISTORICAL BIOLOGY J2 - HIST BIOL VL - 26 PY - 2014 IS - 3 SP - 279 EP - 414 PG - 136 SN - 0891-2963 DO - 10.1080/08912963.2013.777533 UR - https://m2.mtmt.hu/api/publication/2707229 ID - 2707229 N1 - Cited By :63 Export Date: 24 January 2023 Correspondence Address: Osi, A.; Lendület Dinosaur Research Group, Eötvös Loránd University-Hungarian Academy of Sciences, Pázmány Péter sétany 1/c, Budapest 1117, Hungary; email: hungaros@gmail.com AB - Heterodont dentition sometimes including multicuspid crowns appeared in numerous fossil forms through all main lineages of the Crocodyliformes. Teeth in these complex dentitions frequently bear wear facets that are exclusive indicators of tooth-tooth occlusion. Besides, dental features, specialisations of the jaw apparatus, jaw adductors and mandibular movement can be recognised, all reflecting a high variability of jaw mechanism and of intraoral food processing. Comparative study of these features revealed four main types of jaw mechanism, some of which evolved independently in several lineages of Crocodyliformes. Isognathous orthal jaw closure (precise jaw joint, rough wear facets) is characteristic for heterodont protosuchians and all forms possessing crushing posterior teeth. Proal movement (protractive powerstroke) occurred independently in Malawisuchus and Chimaerasuchus is supported by the antagonistic, vertically oriented carinae. Developed external adductors are the main indicators of palinal movement (retractive powerstroke) that evolved at least two times in various South American taxa. The fourth type (in Iharkutosuchus) is characterised by lateromedial mandibular rotation supported by extensive horizontal wear facets. This evolutionary scenario resembles that of the masticatory system of mammals and suggests that the ecological roles of some mammalian groups in North America and Asia were occupied in Western Gondwana by highly specialised crocodyliforms. http://www.zoobank.org/urn:lsid:zoobank.org:pub:D6CE962F-2B38-47F8-BD4B-B9E035917F20 LA - English DB - MTMT ER - TY - JOUR AU - Ősi, Attila AU - Prondvai, Edina TI - Sympatry of two ankylosaurs (Hungarosaurus and cf. Struthiosaurus) in the Santonian of Hungary JF - CRETACEOUS RESEARCH J2 - CRETACEOUS RES VL - 44 PY - 2013 SP - 58 EP - 63 PG - 6 SN - 0195-6671 DO - 10.1016/j.cretres.2013.03.006 UR - https://m2.mtmt.hu/api/publication/2359731 ID - 2359731 N1 - Funding Agency and Grant Number: MTA-ELTE Lendulet Dinosaur Research Group [95102]; Hungarian Scientific Research Fund [OTKA T-38045, PD 73021, NF 84193]; National Geographic Society [7228-02, 7508-03]; Bolyai Fellowship; Hungarian Natural History Museum; Eotvos Lorand University; Jurassic Foundation; Hantken Foundation Funding text: We thank the 2012 field crew for their assistance in the fieldwork. We are especially grateful to the Bakony Bauxite Mining Company and the Geovolan Zrt. for their logistic help. We are grateful to the following colleagues and institutions for access to the material in their care: Karl Rauscher (University of Vienna, Vienna, Austria), Patrick and Annie Mechin (Vitrolles, France); Gilles Cheylan, Yves Dutour and Thierry Tortosa (Natural History Museum, Aix-en-Provence, France). Special thank goes to Martin Sander (University of Bonn, Bonn, Germany) for providing technical background for our histological investigations. We thank Koen Stein (University of Bonn, Bonn, Germany) for useful discussions. We thank Zsofia Hajdu and Dora Csengodi (MTA-ELTE Dinosaur Research Group) and Olaf Dulfer for their technical assistance. Field and laboratory work was supported by the MTA-ELTE Lendulet Dinosaur Research Group (Grant no. 95102), Hungarian Scientific Research Fund (OTKA T-38045, PD 73021, NF 84193), National Geographic Society (Grant No. 7228-02, 7508-03), Bolyai Fellowship, Hungarian Natural History Museum, Eotvos Lorand University, Jurassic Foundation and Hantken Foundation. AB - Abstract A complete and well-preserved right ankylosaurian humerus from the Upper Cretaceous (Santonian) Csehbánya Formation of Iharkút, western Hungary is described here. Based on its osteological features and 21.5 cm adult length, the new specimen is markedly different from the slender humerus of Hungarosaurus, the previously known ankylosaur from the locality, and more similar to that of Struthiosaurus. Thus, the new Hungarian specimen is tentatively assigned here to cf. Struthiosaurus thereby dating back the first occurrence of this genus to the Santonian. The new fossil demonstrates the sympatric co-existence of two different nodosaurid ankylosaurs (a smaller, robust form with 2–2.5 m total body length and a larger, cursorial form with 4–4.5 m body length) in the Iharkút fauna. This also suggests that the pattern of the European ankylosaur diversity was more complex than previously thought. LA - English DB - MTMT ER - TY - CHAP AU - Rabi, Márton AU - Vremir, M AU - Tong, H ED - Brinkman, Donald B ED - Holroyd, Patricia A ED - Gardner, James D TI - Preliminary Overview of Late Cretaceous Turtle Diversity in Eastern Central Europe (Austria, Hungary, and Romania). Morphology and Evolution of Turtles TS - Morphology and Evolution of Turtles T2 - Morphology and Evolution of Turtles PB - Springer Netherlands CY - Dordrecht SN - 9789400743083 T3 - Vertebrate Paleobiology and Paleoanthropology, ISSN 1877-9077 PY - 2013 SP - 307 EP - 336 PG - 30 DO - 10.1007/978-94-007-4309-0_19 UR - https://m2.mtmt.hu/api/publication/2148941 ID - 2148941 N1 - SE 19 LA - English DB - MTMT ER - TY - JOUR AU - Ősi, Attila AU - Prondvai, Edina AU - Butler, R AU - Weishampel, DB TI - Phylogeny, Histology and Inferred Body Size Evolution in a New Rhabdodontid Dinosaur from the Late Cretaceous of Hungary JF - PLOS ONE J2 - PLOS ONE VL - 7 PY - 2012 IS - 9 PG - 25 SN - 1932-6203 DO - 10.1371/journal.pone.0044318 UR - https://m2.mtmt.hu/api/publication/2069911 ID - 2069911 N1 - Hungarian Academy of Sciences-Eötvös Loránd University, Lendület Dinosaur Research Group, Budapest, Hungary GeoBio-Center, Ludwig-Maximilians-Universität München, Munich, Germany Center for Functional Anatomy and Evolution, Johns Hopkins University, Baltimore, MD, United States Cited By :64 Export Date: 24 January 2023 Correspondence Address: Osi, A.; Hungarian Academy of Sciences-Eötvös Loránd University, , Budapest, Hungary; email: hungaros@gmail.com AB - 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. LA - English DB - MTMT ER - TY - CHAP AU - Ősi, Attila AU - Makádi, László AU - Rabi, Márton AU - Szentesi, Zoltán AU - Botfalvai, Gábor AU - Gulyás, P ED - Farlow, J TI - The Late Cretaceous continental vertebrate fauna from Iharkút, western Hungary: a review T2 - Bernissart Dinosaurs and Early Cretaceous Terrestrial Ecosystems PB - Indiana University Press CY - Indianapolis (IN) SN - 9780253357212 PY - 2012 SP - 533 EP - 570 PG - 38 UR - https://m2.mtmt.hu/api/publication/1464155 ID - 1464155 N1 - Cited By :40 Export Date: 15 December 2018 LA - English DB - MTMT ER - TY - JOUR AU - Rabi, Márton AU - Tong, H AU - Botfalvai, Gábor TI - A new species of the side-necked turtle Foxemys (Pelomedusoides: Bothremydidae) from the Late Cretaceous of Hungary and the historical biogeography of the Bothremydini JF - GEOLOGICAL MAGAZINE J2 - GEOL MAG VL - 149 PY - 2012 IS - 4 SP - 662 EP - 674 PG - 13 SN - 0016-7568 DO - 10.1017/S0016756811000756 UR - https://m2.mtmt.hu/api/publication/2112407 ID - 2112407 N1 - Department of Palaeontology, Eötvös Loránd University, Pazmany Peter setany 1/C, 1117 Budapest, Hungary 30 Rue Carnot, 94270 Le Kremlin-Bicêtre, France Cited By :42 Export Date: 5 May 2023 Correspondence Address: Rabi, M.; Department of Palaeontology, Pazmany Peter setany 1/C, 1117 Budapest, Hungary; email: iszkenderun@gmail.com AB - The continental deposits of the Upper Cretaceous (Santonian) Csehbánya Formation of the Bakony Mountains in Hungary yielded abundant remains of a bothremydid side-necked turtle, which are attributed to a new species of the genus Foxemys, Foxemys trabanti. F. trabanti shows strong affinities with the European monophyletic group Foxemydina owing to the absence of pits in the upper and lower triturating surfaces, the exclusion of the jugal from the triturating surface, the separation of the Eustachian tube and the stapes by a narrow fissure, the presence of deep and narrow fossa pterygoidei, the partially closed foramen jugulare posterius and the pentagonal shape of the basisphenoid in ventral view. Among the Foxemydina the bothremydid from Iharkút is more closely related to F. mechinorum than to Polysternon provinciale from the Early Campanian of France, mainly because of the position of the occipital condyle relative to the mandibular condyles of the quadrate. The new remains represent the only record of the Foxemydina outside ofWestern Europe and provide the earliest known occurrence of this endemic, freshwater group in the former Mediterranean Basin. The historical biogeography of the tribe Bothremydini is investigated and a hypothesis of migration from Africa to North America via the high-latitude Thulean route is put forward. © Cambridge University Press 2011. LA - English DB - MTMT ER - TY - JOUR AU - Martin, JE AU - Rabi, Márton AU - Csiki, Z TI - Survival of Theriosuchus (Mesoeucrocodylia: Atoposauridae) in a Late Cretaceous archipelago: a new species from the Maastrichtian of Romania JF - NATURWISSENSCHAFTEN J2 - SCI NAT-HEIDELBERG VL - 97 PY - 2010 IS - 9 SP - 845 EP - 854 PG - 10 SN - 0028-1042 DO - 10.1007/s00114-010-0702-y UR - https://m2.mtmt.hu/api/publication/2523293 ID - 2523293 AB - Small terrestrial non-eusuchian mesoeucrocodylians are common components of Cretaceous assemblages of Gondwanan provinces with notosuchians and araripesuchids as flagship taxa in South America, Africa and Madagascar, well into the Late Cretaceous. On the other hand, these are exceedingly rare in Laurasian landmasses during the Late Cretaceous. Small terrestrial mesoeucrocodylians from Europe were often referred to the genus Theriosuchus, a taxon with stratigraphic range extending from the Late Jurassic to the late Early Cretaceous. Theriosuchus is abundantly reported from various European localities, although Asiatic and possibly North American members are also known. It has often been closely associated with the first modern crocodilians, members of the Eusuchia, because of the presence of procoelous vertebrae, a widespread key character diagnosing the Eusuchia. Nevertheless, the relationships of Theriosuchus have not been explored in detail although one species, Theriosuchus pusillus, has been extensively described and referred in numerous works. Here, we describe a new basal mesoeucrocodylian, Theriosuchus sympiestodon sp. nov. from the Maastrichtian of the HaA eg pound Basin, Romania, suggesting a large temporal gap (about 58 myr) in the fossil record of the genus. Inclusion of the new taxon, along with Theriosuchus guimarotae, in a phylogenetic analysis confirms its referral to the genus Theriosuchus, within a monophyletic atoposaurid clade. Although phylogenetic resolution within this clade is still poor, the new taxon appears, on morphological grounds, to be most closely related to T. pusillus. The relationships of Atoposauridae within Mesoeucrocodylia and especially to Neosuchia are discussed in light of the results of the present contribution as well as from recent work. Our results raise the possibility that Atoposauridae might not be regarded as a derived neosuchian clade anymore, although further investigation of the neosuchian interrelationships is needed. Reports of isolated teeth referable to a closely related taxon from the Upper Cretaceous of Romania and France, together with the presence of Doratodon and Ischyrochampsa, indicate a previously unsuspected diverse assemblage of non-eusuchian mesoeucrocodylians in the Late Cretaceous European archipelago. LA - English DB - MTMT ER - TY - CONF AU - Rabi, Márton AU - Ősi, Attila TI - Specialized basal eusuchian crocodilians in the Late Cretaceous of Europe: evidence for the hylaeochampsid affinites of Acynodon and its implication on alligatoroid biogeography T2 - Abstract volume of the 8th Annual Meeting of the EAVP, Aix-en-Provance C1 - Aix-en-Provence PY - 2010 SP - 71 UR - https://m2.mtmt.hu/api/publication/2524708 ID - 2524708 LA - English DB - MTMT ER - TY - JOUR AU - Ősi, Attila AU - Clark, JM AU - Weishampel, DB TI - First report on a new basal eusuchian crocodyliform with multicusped teeth from the Upper Cretaceous (Santonian) of Hungary JF - NEUES JAHRBUCH FÜR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN J2 - NEUES JAHRB GEOL P-A VL - 243 PY - 2007 IS - 2 SP - 169 EP - 177 PG - 9 SN - 0077-7749 DO - 10.1127/0077-7749/2007/0243-0169 UR - https://m2.mtmt.hu/api/publication/152055 ID - 152055 LA - English DB - MTMT ER - TY - JOUR AU - Ősi, Attila TI - Hungarosaurus tormai, a new ankylosaur (Dinosauria) from the Upper Cretaceous of Hungary JF - JOURNAL OF VERTEBRATE PALEONTOLOGY J2 - J VERTEBR PALEONTOL VL - 25 PY - 2005 IS - 2 SP - 370 EP - 383 PG - 14 SN - 0272-4634 DO - 10.1671/0272-4634(2005)025[0370:HTANAD]2.0.CO;2 UR - https://m2.mtmt.hu/api/publication/1203309 ID - 1203309 LA - English DB - MTMT ER -