Anatomy and phylogeny of the gavialoid crocodylian Eosuchus lerichei from the Paleocene of Europe

• Autorzy: Delfino M , Piras P. , Smith T.
• Języki publikacji: EN

Abstrakty

EN

Originally designated by Dollo in 1907, the holotype of Eosuchus lerichei has never been carefully described but simply cited and compared in a number of papers. This work is an attempt to fill this gap and to place this taxon in a cladistic phylogenetic context. E. lerichei can be considered a valid basal gavialoid from late Paleocene of North Western Europe, sharing the presence of extremely enlarged foramina aerea on quadrates with the coeval Eosuchus minor from eastern North America (formerly described as Gavialis minor). These two species can be considered sister taxa and, for priority reason, they should be both ascribed to genus Eosuchus. The results of the cladistic analysis show that the European species possess characters that can be considered as slightly derived if compared to those of its American relative, suggesting an eastward dispersion from North America before the Paleocene–Eocene boundary and before the full opening of the Atlantic Ocean or local evolution from a basal gavialoid stock similar to E. minor. Both species of Eosuchus come from marine outcrops and represent a further evidence for the salt−water tolerance of the earliest stages of Gavialoidea evolutionary history. Despite the present endemicity of the only living gharial, Gavialis gangeticus, the historical biogeography of gavialoids shows a lost global distribution and reveals several transoceanic dispersals.

Słowa kluczowe

EN

phylogenesis; Crocodylia; Paleocene; Gavialidae; anatomy; osmoregulation; Europe; Eosuchus lerichei; paleontology

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2005
• Tom: 50
• Numer: 3
• Opis fizyczny: p.565-580,fig.,ref.

Twórcy

autor

Delfino M

• Universita di Firenze, Via G.La Pira 4, I-50121 Firenze, Italy

autor

Piras P.

autor

Smith T.

Bibliografia

• Andrews, C.W. 1901. Preliminary note on some recently discovered extinct vertebrates from Egypt. Geological Magazine 8: 436–444.
• Berggren, W.A., Kent, D.V., Swisher, C.C., and Aubry, M.−P. 1995. A revised Cenozoic geochronology and chronostratigraphy. In: W.A. Berggren, D.V. Kent, M.−P. Aubry, and J. Hardenbol (eds.), Geochronology, Time Scales and Stratigraphic Correlation; Framework for an Historical Geology. Society for Economic Palaeontologists and Mineralogists, Special Publication 54: 129–212.
• Brochu, C.A. 1996. Closure of neurocentral sutures during crocodilian ontogeny: implications for maturity assessment in fossil archosaurs. Journal of Vertebrate Paleontology 16: 49–62.
• Brochu, C.A. 1997. Phylogenetic Systematic and Taxonomy of Crocodylia. 467 pp. Ph.D. thesis, University of Texas, Austin.
• Brochu, C.A. 1999. Phylogenetics, taxonomy, and historical biogeography of Alligatoroidea. Journal of Vertebrate Paleontology 19 (Supplement to No. 2): 9–100.
• Brochu, C.A. 2000. Borealosuchus (Crocodylia) from the Paleocene of Big Bend National Park, Texas. Journal of Paleontology 74: 181–187.
• Brochu, C.A. 2001a. Crocodylian snouts in space and time: phylogenetic approaches toward adaptive radiation. American Zoologist 41: 564–585.
• Brochu, C.A. 2001b. Congruence between physiology, phylogenetics and the fossil record on crocodylian historical biogeography. In: G.C. Grigg, F. Seebacher, and C.E. Franklin (eds.), Crocodilian Biology and Evolution, 9–28. Surrey Betty and Sons, Chipping Norton.
• Brochu, C.A. 2003. Phylogenetic approaches toward crocodylian history. Annual Review of Earth and Planetary Sciences 31: 357–397.
• Brochu, C.A. 2004. A new Late Cretaceous gavialoid crocodylian from eastern North America and the phylogenetic relationships of Thoracosaurs. Journal of Vertebrate Paleontology 24: 610–633.
• Brochu, C.A. (in press). Osteology and phylogenetic significance of Eosuchus minor (Marsh 1870), new combination, a longirostrine crocodylian from the late Paleocene of North America. Journal of Paleontology.
• Brochu, C.A. and Gingerich, P.D. 2000. New tomistomine crocodylian from the Middle Eocene (Bartonian) of Wadi Hitan, Fayum Province, Egypt. Contributions from the Museum of Paleontology of the University of Michigan 30 (10): 251–268.
• Brochu, C.A. and Rincón, A.D. 2004. A Gavialoid Crocodylian from the Lower Miocene of Venezuela. In: M. Sánchez−Villagra and J. Clack (eds.), Fossils of the Castillo Formation, Venezuela: Contributions in Neotropical Palaeontology. Special Papers in Palaeontology 71: 61–79.
• Broom, R. 1925. On the South African rhynchocephaloid reptile “Eosuchus” colletti, Watson. Records of the Albany Museum 3: 300–306.
• Buckland W. 1836. Geology and Mineralogy Considered with Reference to Natural Theology. 481 pp. Pickering, London.
• Buffetaut, E. 1982. Systématique, origine et évolution des Gavialidae sud−américains. Geobios 6 (mémoire spécial): 127–140.
• Buscalioni, A.D., Ortega, F., Weishampel, D.B., and Jianu, C.M. 2001. A revision of the crocodyliform Allodaposuchus precedens from the Upper Cretaceous of the Hateg Basin, Romania. Its relevance in the phylogeny of Eusuchia. Journal of Vertebrate Paleontology 21: 74–86.
• Buscalioni, A.D., Pérez−Moreno, B.P., and Sanz, J.L. 2003. Pattern of biotic replacement in modern crocodiles during the Late Cretaceous. Colloquios de Paleontología 1 (Volumen Extraordinario): 77–93.
• De Coninck, J., de Decker, M., de Heinzelin, J., and Willems, W. 1981. L’âge des faunes d’Erquelinnes. Bulletin de la Société belge de Géologie 90 (2): 121–154.
• Dollo, L. 1907. Nouvelle note sur les reptiles de l’Eocène inférieur de la Belgique et des régions voisines (Eosuchus lerichei et Eosphargis gigas). Bulletin de la Société belge de Géologie, Paleontologie et Hydrologie 21: 81–85.
• Gatesy, J., Amato, G., Norell, M., DeSalle, R., and Hayashi, C. 2003. Combined support for wholesale taxic atavism in gavialine crocodylians. Systematic Biology 52: 403–422.
• Gmelin, J.F. 1789. Caroli a Linné systema naturae per regna tri naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. 1516 pp. G.E. Beer, Leipzig.
• Gradstein, F.M., Ogg, J.G., and Smith, A.G. 2005. A Geologic Time Scale 2004. 589 pp. Cambridge University Press, Cambridge.
• Hay, O.P. 1930. Second bibliography and catalogue of the fossil Vertebrata of North America, Vol. 2. 390 pp. Publications of the Carnegie Institute, Washington.
• Hua, S. and Jouve, S. 2004. A primitive marine gavialoid from the Paleocene of Morocco. Journal of Vertebrate Paleontology 24: 341–350.
• Huxley, T.H. 1875 On Stagonolepis robertsoni, and on the evolution of the Crocodilia. Quarterly Journal of the Geological Society 31: 423–438.
• International Stratigraphic Commission 2004. http://www.stratigraphy.org/
• Jouve, S. 2004. Etude des crocodyliformes fini Cretace−Paleogene du Bassin des Oulad Abdoun (Maroc) et comparaison avec les faunes africaines contemporaines: systematique, phylogenie et paleobiogeographie. 652 pp. Ph.D. thesis, Muséum National d’Histoire Naturelle de Paris, Paris.
• Kraus, R. 1998. The cranium of Piscogavialis jugaliperforatus n. gen., n. sp. (Gavialidae, Crocodylia) from the Miocene of Peru. Paläontologische Zeitschrift 72: 389–406.
• Kuhn, O. 1936. Fossilium Catalogus I: Animalia, Pars 75: Crocodylia. 116 pp. W. Junk, ‘s−Gravenhage, The Netherlands.
• Langston, W. and Gasparini, Z. 1997. Crocodilians, Gryposuchus and the South American gavials. In: R.F. Kay, R.H. Madden, R.L. Cifelli, and J.J. Flynn (eds.), Vertebrate Paleontology in the Neotropics: the Miocene Fauna of La Venta, Colombia, 113–154. Smithsonian Institute, Washington, D.C.
• Leslie, A.J. and Taplin, L.E. 2001. Recent development in osmoregulation of crocodilians. In: G.C. Grigg, F. Seebacher, and C.E. Franklin (eds.), Crocodilian Biology and Evolution, 265–279. Surrey Betty and Sons, Chipping Norton.
• Marsh, O.C. 1870. Notice of a new species of gavial from the Eocene of New Jersey. American Journal of Science 50: 2–3.
• Morton, S.G. 1845. Description of the head of a fossil crocodile from the Cretaceous strata of New Jersey. Proceedings of the Academy of Natural Sciences of Philadelphia 2: 82–85.
• Nopcsa, F. 1928. Paleontological notes on Reptilia. 7. Classification of the Crocodilia. Geologica Hungarica, Series Palaeontologica 1: 75–84.
• Norell, M. and Storrs, G.W. 1986. Catalogue and review of the type fossil crocodilians in the Yale Peabody Museum. Postilla 203: 1–28.
• Noubhani, A. and Cappetta, H. 1997. Les Orectolobiformes, Carcharhiniformes et Myliobatiformes (Elasmobranchii, Neoselachii) des bassins à phosphate du Maroc (Maastrichtien–Lutétien basal). PalaeoIchthyologica 8: 1–327.
• Owen, R. 1850. Monograph on the Fossil Reptilia of the London Clay, and of the Bracklesham and Other Tertiary Beds, Part II: Crocodilia (Crocodilus, etc.). 50 pp. Palaeontographical Society, London.
• Piras, P. and Kotsakis, T. (in press). A new gavialid from early Miocene of south−eastern Pakistan. Rendiconti della Società Paleontologica Italiana 2.
• Powell, A.J. 1992. Dinoflagellate cysts of the Tertiary System. In: A.J. Powell (ed.), A Stratigraphic Index of Dinoflagellate Cysts, 155–252. Chapman and Hall, London.
• Sigogneau−Russell, D. and de Heinzelin, J. 1979. Les Champsosaures européens: mise au point sur le Champsosaure d’Erquelinnes (Landénien inférieur, Belgique), avec introduction stratigraphique. Annales de Paléontologie, Vertébrés 65 (2): 93–154.
• Steel, R. 1973. Crocodylia. Encyclopedia of Paleoherpetology, Vol. 16, 116 pp. Fischer−Verlag, Stuttgart.
• Steurbaut, E. 1998. High−resolution holostratigraphy of Middle Paleocene to Early Eocene strata in Belgium and adjacent areas. Palaeontographica A 247 (4–6): 1–65.
• Swinton, W.E. 1937. The crocodile of Maransart (Dollosuchus dixoni [Owen]). Mémoires du Musée royal d’Histoire naturelle de Belgique 80: 1–49.
• Swofford, D.L. 1999. PAUP*. Phylogenetic Analysis Using Parsimony (*and other methods). Version 4. Sinauer Associates, Sunderland, MA.
• Teilhard de Chardin, P. 1927. Les Mammifères de l’Eocène inférieur de la Belgique. Mémoires du Musée royal d’Histoire naturelle de Belgique 36: 1–33.
• Vasse, D. 1993. Systématique de crocodiles du Crétacé supérieur et du Paléogène d’Europe. Aspects paléobiogéographiques et paléoécologiques. 224 pp. Ph.D. thesis, University of Paris 6, Paris.
• Watson, D.M.S. 1912. Eosuchus colletti, gen. et spec. nov. Records of the Albany Museum 2: 298–299.