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Azhdarchid pterosaurs: water-trawling pelican mimics or "terrestrial stalkers"?

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The lifestyles of all pterosaurs are contentious, but those of the pterodactyloid clade Azhdarchidae are particularly debated. A 2008 review of the functional morphology of azhdarchid pterosaurs concluded that they were probably terrestrial foragers, as evidenced by their long limbs, generalised skull construction, the arthrological limitations of their cervical series, trackway data indicating terrestrial proficiency, a strong continental skew in the depositional context of their fossils, and several additional lines of corroborating evidence. This hypothesis was recently challenged on three counts: (i) azhdarchid fossils routinely occur in aquatic deposits; (ii) terrestrially-foraging pterosaurs were highly vulnerable to predation and (iii), aerial "water trawling", where the mandible is pulled though water to catch food in a distended throat pouch, is a more likely foraging strategy. Pelican-like jaw mechanics were suggested for azhdarchids because of the asymmetrical jaw joints in these pterosaurs, which permit lateral deflection of the mandibular rami during jaw extension. We evaluate these three claims and conclude that all are flawed. The frequent occurrence of azhdarchid fossils in aquatic sedimentary systems is not significant with regard to ecology or behaviour, since these provide the overwhelming mechanism for the preservation of all fossil terrestrial animals. Likely pterosaur takeoff abilities and the ubiquitous nature of modern, terrestrially-foraging birds indicate that predation risks on ground-foraging pterosaurs are probably overstated. The kinematics of pterosaur jaws are entirely different to those of pelicans, which are highly specialised compared to those of all other tetrapods, and there are no indications from azhdarchid jaw anatomy that azhdarchids indulged in pelican-like foraging behaviour. The estimated amount of jaw expansion present in azhdarchids was minimal compared to that of pelicans, even when the asymmetrical jaw joints of azhdarchids are taken into account. Moreover, the widespread occurrence of asymmetrical jaw joints in other reptiles demonstrates that they are not related to any specific feeding habits. We conclude that terrestrial foraging remains the most parsimonious habit for azhdarchid pterosaurs.
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  • School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, PO1 3QL, UK
  • Ocean and Earth Science, National Oceanography Centre, Southampton, University of Southampton, Southampton SO14 3ZH, UK
  • Averianov, A.O. 2010. The osteology of Azhdarcho lancicollis Nessov, 1984 (Pterosauria, Azhdarchidae) from the late Cretaceous of Uzbekistan. Proceedings of the Zoological Institute RAS 314: 264-317.
  • Averianov, A.O. 2013. Reconstruction of the neck of Azhdarcho lancicollis and lifestyle of azhdarchids (Pterosauria, Azhdarchidae). Paleonto-logical Journal 47: 203-209.
  • Barrett, P.M., Butler, R.J., Edwards, N.P., and Milner, A.R. 2008. Pterosaur distribution in time and space: an atlas. Zitteliana B28: 61-107.
  • Bennett, S.C. 2001. The osteology and functional morphology of the Late Cretaceous pterosaur Pteranodon. Palaeontographica Abteilung A 260: 1-153.
  • Buffetaut, E., Grigorescu, D., and Csiki, Z. 2002. A new giant pterosaur with a robust skull from the latest Cretaceous of Romania. Naturwissenschaften 89: 180-184.
  • Buffetaut, E., Grigorescu, D., and Csiki, Z. 2003. Giant azhdarchid pterosaurs from the terminal Cretaceous of Transylvania (western Romania). In: E. Buffetaut and J.M. Mazin (eds.), Evolution and Palaeobiology of Pterosaurs. Geological Society Special Publication 217: 91-104.
  • Carroll, N.R., Poust, A.W., and Varricchio, D.J. 2013. A third azhdarchid pterosaur from the Two Medicine Formation (Campanian) of Montana. In: J.M. Sayao, F.R. Costa, R.A.M. Bantim, and A.W.A. Kellner (eds.), International Symposium on Pterosaurs, Rio Ptero 2013, Short Communications, 40-42. Universidad Federal do Rio de Janeiro, Rio de Janeiro.
  • Cai, Z. and Wei, F. 1994. Zhejiangopterus linhaiensis (Pterosauria) from the Upper Cretaceous of Linhai, Zhejiang, China. Vertebrata Palasiatica 32: 181-194.
  • Cavin, L., Tong, H., Boudad, L., Meister, C., Piuz, A., Tabouelle, J., Piuz, A., Aarab, M., Amiot, R., Buffetaut, E., Dyke, G., Hua, S., and Le Loeuff, J. 2010. Vertebrate assemblages from the early Late Cretaceous of southeastern Morocco: an overview. Journal of African Earth Sciences 57: 391-412.
  • Company, J., Ruiz-Omeňaca, J.I., and Pereda Suberbiola, X. 1999.A long-necked pterosaur (Pterodactyloidea, Azhdarchidae) from the Upper Cretaceous of Valencia, Spain. Geologie enMijinbouw78: 319-333.
  • Chatterjee, S. and Templin, R.J. 2004. Posture, locomotion, and paleoeco-logy of pterosaurs. Geological Society of America Special Papers 376: 1-64.
  • Coulson, A.B. 1998. Sedimentology and Taphonomy of a Juvenile Alam-osaurus Site in the Javelina Formation (Upper Cretaceous), Big Bend National Park, Texas. 103 pp. Unpublished Ph.D. Thesis, Texas Tech University, Lubbock.
  • Csiki, Z., Vremir, M., Brusatte, S.L., and Norell, M.A. 2010. An aberrant island-dwelling theropod dinosaur from the Late Cretaceous of Romania. Proceedings of the National Academy of Sciences 107: 15357-15361.
  • Dawson, M.M., Metzger, K.A., Baier, D.B., and Brainerd, E.L. 2011. Kinematics of the quadrate bone during feeding in mallard ducks. The Journal of Experimental Biology 214: 2036-2046.
  • Elgin, R.A., Hone, D.W., and Frey, E. 2011. The extent of the pterosaur flight membrane. ActaPalaeontologicaPolonica 56: 99-111.
  • Field, D.J., Lin, S.C., Ben-Zvi, M., Goldbogen, J.A., and Shadwick, R. 2011.Convergent evolution driven by similar feeding mechanics in balaenopterid whales and pelicans. The Anatomical Record 294: 1273-1282.
  • Frey, E. and Martill, D.M. 1996. A reappraisal of Arambourgiania (Pterosauria, Pterodactyloidea): one of the world's largest flying animals. Neues Jahrbuch für Geologie und Paläontologie, Abhandlugen 199: 221-247.
  • Frey, E., Martill, D.M., and Buchy, M.C. 2003a. A new crested ornitho-cheirid from the Lower Cretaceous of northeastern Brazil and the unusual death of an unusual pterosaur. In: E. Buffetaut and J.M. Mazin (eds.), Evolution and Palaeobiology of Pterosaurs. Geological Society Special Publication 217: 55-63.
  • Frey, E., Tischlinger, H., Buchy, M.C., and Martill, D. M. 2003b. New specimens of Pterosauria (Reptilia) with soft parts with implications for pterosaurian anatomy and locomotion. In: E. Buffetaut and J.M. Mazin (eds.), Evolution and Palaeobiology of Pterosaurs. Geological Society Special Publication 217: 233-266.
  • Habib, M.B. 2008. Comparative evidence for quadrupedal launch in pterosaurs. Zitteliana B28: 161-168.
  • Habib, M.B. 2013. Constraining the air giants: limits on size in flying animals as an example of constraint-based biomechanical theories of form. Biological Theory 8: 245-252.
  • Habib, M.B. and Cunningham, J. 2010. Capacity for water launch in An-hanguera and Quetzalcoatlus. Acta Geoscientica Sinica 31: 24-25.
  • Hancock, J.A., Kushan. J.A., and Kahl, M.P. 1992. Storks, Ibises and Spoonbills of the World. 385 pp. Princeton University Press, Princeton.
  • Hone, D.W. and Rauhut, O.W. 2010. Feeding behaviour and bone utilization by theropod dinosaurs. Lethaia 43: 232-244.
  • Hone, D.W., Tsuihiji, T., Watabe, M., and Tsogtbaatr, K. 2012. Pterosaurs as a food source for small dromaeosaurs. Palaeogeography, Palaeocli-matology, Palaeoecology 331-332: 27-30.
  • Humphries, S., Bonser, R.H., Witton, M.P., and Martill, D.M. 2007. Did pterosaurs feed by skimming? Physical modelling and anatomical evaluation of an unusual feeding method. PLoS Biology 5: e204.
  • Hutchinson, J.R. and Garcia, M. 2002. Tyrannosaurus was not a fast runner. Nature 415: 1018-1021.
  • Hwang, K.G., Huh, M., Lockley, M.G., Unwin, D.M., and Wright, J.L. 2002. New pterosaur tracks (Pteraichnidae) from the Late Cretaceous Uhangri Formation, S.W. Korea. Geological Magazine 139: 421-435.
  • Ibrahim, N., Unwin, D.M., Martill, D.M., Baidder, L., and Zouhri, S. 2010. A new pterosaur (Pterodactyloidea: Azhdarchidae) from the Upper Cretaceous of Morocco. PLoS ONE 5: e10875.
  • Kellner, A.W.A. and Langston W., Jr. 1996. Cranial remains of Quetzal-coatlus (Pterosauria, Azhdarchidae) from Late Cretaceous sediments of Big Bend National Park, Texas. Journal of Vertebrate Paleontology 16: 222-231.
  • Langston, W., Jr. 1981. Pterosaurs. Scientific American 244: 122-136.
  • Lehman, T.M. and Langston, W., Jr. 1996. Habitat and behaviour of Quetzalcoatlus: paleoenvironmental reconstruction of the Javelina Formation (Upper Cretaceous), Big Bend National Park, Texas. Journal of Vertebrate Paleontology 16: 48A.
  • Lawson, D.A. 1975. Pterosaur from the latest Cretaceous of West Texas: discovery of the largest flying creature. Science 187: 947-948.
  • Mackay, H. 1950. The quaint Marabou stork. Zoo Life 5: 91-92.
  • McSweeney, T. and Stoskopf, M.K. 1988. Selected anatomical features of the neck and gular sac of the brown pelican (Pelecanus occidentalis). Journal of Zoo Animal Medicine 19: 116-121.
  • Martill, D.M. 1997. From hypothesis to fact in a flight of fancy: the responsibility of the popular scientific media. Geology Today 13: 71-73.
  • Martill, D.M. and Naish, D. 2006. Cranial crest development in the azhdar-choid pterosaur Tupuxuara, with a review of the genus and tapejarid monophyly. Palaeontology 49: 925-941.
  • Mazin, J.M., Billon-Bruyat, J., Hantzepergue, P., and Larauire, G. 2003. Ichnological evidence for quadrupedal locomotion in pterodactyloid pterosaurs: trackways from the Late Jurassic of Crayssac. In: E. Buffe-taut and J.M. Mazin (eds.), Evolution and Palaeobiology of Pterosaurs. Geological Society Special Publication 217: 283-296.
  • Meyers, R.A. and Myers, R.P. 2005. Mandibular bowing and mineralization in brown pelicans. The Condor 107: 445-449.
  • Nessov, L.A. 1984. Pterosaurs and birds of the Late Cretaceous of Central Asia. Paläontologische Zeitschrift 1: 47-57.
  • Osi, A., Weishampel, D.B., and Jianu, C.M. 2005. First evidence of azhdarchid pterosaurs from the Late Cretaceous of Hungary. Acta Palaeonto-logicaPolonica 50: 777-787.
  • Paul, G.S. 2002. Dinosaurs of the Air: the Evolution and Loss of Flight in Dinosaurs and Birds. 472 pp. John Hopkins University Press, Baltimore.
  • Prieto, I.R. 1998. Functional morphology and feeding habits of Quetzal-coatlus (Pterosauria). Coloquios de Paleontología 49: 129-144.
  • Schreiber, R.W. and Woolfenden, G.E. 1975. Prey capture by the Brown Pelican. The Auk 92: 649-654.
  • Shannon, P.W. 1987. The Jabiru Stork (Jabiru mycteria) in zoo collections in the United States. Colonial Waterbirds 10: 242-250.
  • Unwin, D.M. 2005. The Pterosaurs from Deep Time. 347 pp. Pi Press, New York.
  • Vremir, M. 2010. New faunal elements from the late Cretaceous (Maas-trichtian) continental deposits of Sebes, area (Transylvania). Terra Sebus, Acta Musei Sabesiensis 2: 635-684.
  • Vremir, M., Kellner, A.W.A., Naish, D., and Dyke, G.J. 2013. A new azh-darchid pterosaur from the Late Cretaceous of the Transylvanian Basin, Romania: implications for azhdarchid diversity and distribution. PLoS ONE 8: e54268.
  • Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.) 2004. The Dino-sauria. 861 pp. University of California Press, Berkeley.
  • Wellnhofer, P. 1978. Handbuch derPaläoherpetologie. Teil 19: Pterosauria. 82 pp. Gustav Fischer Verlag, Stuttgart.
  • Wellnhofer, P. 1980. Flugsaurierresteaus der Gosau-Kreide von Muthmanns-dorf (Niederösterreich) - ein Beitragzur Kiefermechanik der Pterosauri-er. Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Historische Geologie 20: 95-112.
  • Wellnhofer, P. 1991. The Illustrated Encyclopaedia of Pterosaurs. 192 pp. Salamander Books Ltd., London.
  • Wellnhofer, P. and Buffetaut, E. 1999. Pterosaur remains from the Cretaceous of Morocco. Palaontologische Zeitschrift 73: 133-142.
  • Witton, M.P. 2008. A new approach to determining pterosaur body mass and its implications for pterosaur flight. Zitteliana B28: 143-159.
  • Witton, M.P. 2013. Pterosaurs: Natural History, Evolution, Anatomy. 306 pp. Princeton University Press, Princeton.
  • Witton, M.P. and Naish, D. 2008.A reappraisal of azhdarchid pterosaur functional morphology and paleoecology. PLoS ONE 3: e2271.
  • Witton, M.P. and Habib, M.B. 2010. On the size and flight diversity of giant pterosaurs, the use of birds as pterosaur analogues and comments on pterosaur flightlessness. PLoS ONE 5: e13982.
  • Zusi, R.L. 1962. Structural adaptations of the head and neck in the Black Skimmer, Rynchops nigra Linnaeus. Publications of the Nuttal Ornithological Club 3: 1-101.
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