Dentition and relationships of the Jurassic mammal Shuotherium

• Autorzy: Kielan-Jaworowska Z , Cifelli R.L. , Luo Z.
• Języki publikacji: EN

Abstrakty

EN

The Middle Jurassic mammal Shuotherium has lower molars that possess a trigonid and talonid, but are unique in having the talonid situated in front of the trigonid, rather than behind it, as in molars of usual tribosphenic pattern. Shuotherium dongi Chow and Rich, 1982 was based on a dentary bearing seven teeth, originally interpreted as three premolars and four molars. Based on comparison with other groups of early mammals, we reinterpret the premolar–molar boundary in the holotype of S. dongi, and propose a dental formula of four (or more) premolars and three molars. The ultimate lower premolar (previously identified as the first molar) has a completely developed trigonid and no talonid or pseudo−talonid. We hypothesize that the mesial cingulid on molars of Australosphenida is a highly plausible structural antecedent to the pseudo−talonid of Shuotherium. This and other shared, derived features support a relationship of Shuotherium and Australosphenida as sister−taxa. We hypothesize that the common ancestor of Shuotherium + Australosphenida had a global distribution no younger than early Middle Jurassic, and that the respective clades diverged prior to full separation of Gondwanan and Laurasian landmasses.

Słowa kluczowe

EN

molar; mammal; dentition; China; Shuotherium; Australosphenida; Jurassic; paleontology

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2002
• Tom: 47
• Numer: 3
• Opis fizyczny: p.479-486,fig.

Twórcy

autor

Kielan-Jaworowska Z

• Polish Academy of Sciences, Twarda 51-55, 00-818 Warsaw, Poland

autor

Cifelli R.L.

autor

Luo Z.

Bibliografia

• Archer, M., Flannery, T.F., Ritchie, A., and Molnar, R. 1985. First Mesozoic mammal from Australia–an Early Cretaceous monotreme. Nature 318: 363–366.
• Archer, M., Murray, P., Hand, S.J., and Godthelp, H. 1993. Reconsideration of monotreme relationships based on the skull and dentition of the Miocene Obdurodon dicksoni. In: F.S. Szalay, M.J. Novacek, and M.C. McKenna (eds.), Mammal Phylogeny: Mesozoic Differentiation, Multituberculates, Monotremes, Early Therians, and Marsupials, 75–94. Springer−Verlag, New York.
• Butler, P.M. 1952. Molarization of the premolars in Perissodactyla. Proceedings of the Zoological Society of London 121: 810–843.
• Butler, P.M. 1988. Phylogeny of the insectivores. In: M.J. Benton (ed.), The Phylogeny and Classification of the Tetrapods, vol. 2: Mammals, 117–141. Clarendon Press, Oxford.
• Butler, P.M. 1990. Early trends in the evolution of tribosphenic molars. Biological Reviews 65: 529–552.
• Butler, P.M. 1995. Another look at premolars. In: R.J. Radlanski and H. Renz (eds.), Proceedings of the 10th International Symposium on Dental Morphology, 1–6. C. & M. Brunne, Berlin.
• Butler, P.M. and Clemens, W.A. 2001. Dental morphology of the Jurassic holotherian mammal Amphitherium, with a discussion of the evolution of mammalian post−canine dental formulae. Palaeontology 44: 1–20.
• Chow, M. and Rich, T.H. 1982. Shuotherium dongi, n. gen. and sp., a therian with pseudo−tribosphenic molars from the Jurassic of Sichuan, China. Australian Mammalogy 5: 127–142.
• Cifelli, R.L. 1990. Cretaceous mammals of southern Utah. I. Marsupial mammals from the Kaiparowits Formation (Judithian). Journal of Vertebrate Paleontology 10: 295–319.
• Cifelli, R.L. 1999. Tribosphenic mammal from the North American Early Cretaceous. Nature 401: 363–366.
• Cifelli, R.L. and Madsen, S.K. 1999. Spalacotheriid symmetrodonts (Mammalia) from the medial Cretaceous (upper Albian or lower Cenomanian) Mussentuchit local fauna, Cedar Mountain Formation, Utah, USA. Geodiversitas 21: 167–214.
• Cifelli, R.L., Rowe, T.B., Luckett, W.P., Banta, J., Reyes, R., and Howes, R.I. 1996. Origin of marsupial pattern of tooth replacement: fossil evidence revealed by high resolution X−ray CT. Nature 379: 715–718.
• Clemens, W.A. and Kielan−Jaworowska, Z. 1979. Multituberculata. In: J.A. Lillegraven, Z. Kielan−Jaworowska, and W.A. Clemens (eds.), Mesozoic Mammals: The First Two−thirds of Mammalian History, 99–149. University of California Press, Berkeley.
• Clemens, W.A. and Lillegraven, J.A. 1986. New Late Cretaceous, North American advanced therian mammals that fit neither the marsupial nor eutherian molds. Contributions to Geology, University of Wyoming, Special Paper 3: 55–85.
• Clemens, W.A. and Mills, J.R.E. 1971. Review of Peramus tenuirostris. Bulletin of the British Museum (Natural History), Geology 20: 89–113.
• Crompton, A.W. 1971. The origin of the tribosphenic molar. In: D.M. Kermack and K.A. Kermack (eds.), Early Mammals, 65–87. Zoological Journal of the Linnean Society 50 (Supplement 1), London.
• Crompton, A.W. and Hiiemae, K.M. 1970. Molar occlusion and mandibular movements during occlusion in the American opossum, Didelphis marsupialis L. Zoological Journal of the Linnean Society 49: 21–47.
• Crompton, A.W. and Jenkins, F.A., Jr. 1967. American Jurassic symmetrodonts and Rhaetic “pantotheres.” Science 155: 1006–1009.
• Crompton, A.W. and Kielan-Jaworowska, Z. 1978. Molar structure and occlusion in Cretaceous therian mammals. In: P.M. Butler and K.A. Joysey (eds.), Studies in the Development, Function and Evolution of Teeth, 249–287. Academic Press, London.
• Dashzeveg, D. 1994. Two previously unknown eupantotheres (Mammalia, Eupantotheria). American Museum Novitates 3107: 1–11.
• Evans, S.E. and Milner, A.R. 1994. Middle Jurassic microvertebrate assemblages from the British Isles. In: N.C. Fraser and H.−D. Sues (eds.), In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods, 303–321. Cambridge University Press, Cambridge.
• Flynn, J.J., Parrish, J.M., Rakotosamimanana, B., Simpson, W.F., and Wyss, A.E. 1999. A Middle Jurassic mammal from Madagascar. Nature 401: 57–60.
• Fox, R.C. 1975. Molar structure and function in the Early Cretaceous mammal Pappotherium: evolutionary implications for Mesozoic Theria. Canadian Journal of Earth Sciences 12: 412–442.
• Gill, P.G. 1974. Resorption of premolars in the early mammal Kuehneotherium praecursoris. Archives of Oral Biology 19: 327–328.
• Hopson, J.A. 1969. The origin and adaptive radiation of mammal−like reptiles and nontherian mammals. Annals of the New York Academy of Sciences 167: 199–216.
• Hopson, J.A. 1994. Synapsid evolution and the radiation of non−eutherian mammals. In: R.S. Spencer (ed.), Major Features of Vertebrate Evolution, 190–219. The Paleontological Society, Knoxville.
• Hopson, J.A. 1995. The Jurassic mammal Shuotherium dongi: “pseudotribosphenic therian”, docodontid, or neither? Journal of Vertebrate Paleontology 15 (Supplement: 36A).
• Hu, Y.−M., Wang, Y.−Q., Luo, Z.−X., and Li, C.−K. 1997. A new symmetrodont mammal from China and its implications for mammalian evolution. Nature 390: 137–142.
• Ji, Q., Luo, Z.-X., Yuan, C.-X.,Wible, J.R., Zhang, J.-P., and Georgi, J.A. 2002. The earliest known eutherian mammal. Nature 416: 816–820.
• Kermack, D.M., Kermack, K.A., and Mussett, F. 1968. The Welsh pantothere Kuehneotherium praecursoris. Journal of the Linnean Society (Zoology) 4: 407–423.
• Kermack, K.A., Lee, A.J., Lees, P.M., and Mussett, F. 1987. Anew docodont from the Forest Marble. Zoological Journal of the Linnean Society 89: 1–39.
• Kielan−Jaworowska, Z., Cifelli, R.L., and Luo, Z.−X. 1998. Alleged Cretaceous placental from down under. Lethaia 31: 267–268.
• Kielan−Jaworowska, Z. and Dashzeveg, D. 1989. Eutherian mammals from the Early Cretaceous of Mongolia. Zoologica Scripta 18: 347–355.
• Krebs, B. 1991. Das Skelett von Henkelotherium guimarotae gen. et sp. nov. (Eupantotheria, Mammalia) aus dem Oberen Jura von Portugal. Berliner geowissenschafliche Abhandlungen A 133: 1–110.
• Krishtalka, L. 1976. Early Tertiary Adapiscoricidae and Erinaceidae (Mammalia, Insectivora) of North America. Bulletin of the Carnegie Museum of Natural History 1: 1–40.
• Lucas, S.G. 1996. Vertebrate biochronology of the Jurassic of China. In: M. Morales (ed.), The Continental Jurassic. Museum of Northern Arizona Bulletin 60: 23–33. Flagstaff.
• Lucas, S.G. 2001. Chinese Fossil Vertebrates. xii + 375 pp. Columbia University Press, New York.
• Luckett, W.P. 1993. An ontogenetic assessment of dental homologies in therian mammals. In: F.S. Szalay, M.J. Novacek, and M.C. McKenna (eds.), Mammal Phylogeny: Mesozoic Differentiation, Multituberculates, Monotremes, Early Therians, and Marsupials, 182–204. Springer−Verlag, New York.
• Luo, Z.−X. 1994. Sister−group relationships of mammals and transformations of diagnostic mammalian characters. In: N.C. Fraser and H.−D. Sues (eds.), In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods, 98–128. Cambridge University Press, Cambridge.
• Luo, Z.−X., Cifelli, R.L., and Kielan−Jaworowska, Z. 2001. Dual origin of tribosphenic mammals. Nature 409: 53–57.
• Luo, Z.−X., Crompton, A. W., and Sun, A.−L. 2001. Anew mammal from the Early Jurassic and evolution of mammalian characteristics. Science 292: 1535–1540.
• Luo, Z.−X., Kielan−Jaworowska, Z., and Cifelli, R.L. 2002. In quest for a phylogeny of Mesozoic mammals.Acta Palaeontologica Polonica 47: 1–78.
• Martin, T. 1997. Tooth replacement in Late Jurassic Dryolestidae (Eupantotheria, Mammalia). Journal of Mammalian Evolution 4: 1–18.
• Martin, T. 1999. Dryolestidae (Dryolestoidea, Mammalia) aus dem Oberen Jura von Portugal. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 550: 1–119.
• Martin, T. (in press). New stem−line representatives of Zatheria (Mammalia) from the Late Jurassic of Portugal. Journal of Vertebrate Paleontology 22.
• McKenna, M.C. 1975. Toward a phylogenetic classification of the Mammalia. In: W.P. Luckett and F.S. Szalay (eds.), Phylogeny of the Primates, 21–46. Plenum Publishing Corporation, New York.
• McKenna, M.C. and Bell, S.K. 1997. Classification of Mammals Above the Species Level. xii + 631 pp. Columbia University Press, New York.
• Mills, J.R.E. 1964. The dentitions of Peramus and Amphitherium. Proceedings of the Linnean Society of London 175: 117–133.
• Mills, J.R.E. 1984. The molar dentition of a Welsh pantothere. Zoological Journal of the Linnean Society 82: 189–205.
• Osborn, J.W. and Sita−Lumdsen, A. 1978. An alternative to “thegosis” and a re−examination of the ways in which mammalian molars work. Neues Jahrbuch für Geologie und Paläontologie 156: 371–392.
• Pascual, R. and Goin, F. J. 2001. Non−tribosphenic Gondwanan mammals, and the alternative development of molars with the reversed triangle cusp pattern. In: H.A. Leanza (ed.), VII International Symposium on Mesozoic Terrestrial Ecosystems, 157–162. Asociación Paleontológica Argentina. Publicación Especial 7, Buenos Aires.
• Pascual, R., Goin, F.J., Balarino, L., and Udrizar Sauthier, D.E. 2002. New data on the Paleocene monotreme Monotrematum sudamericanum, and the convergent evolution of triangulate molars. Acta Palaeontologica Polonica 47: 487–492.
• Rauhut, O.W.M., Martin, T., and Ortiz−Jaureguizar, E.O. 2002. The first Jurassic mammal from South America. Nature 416: 165–168.
• Rich, T.H. 1981. Origin and history of the Erinaceinae and Brachyericinae (Mammalia, Insectivora) in North America. Bulletin of the American Museum of Natural History 171: 1–116.
• Rich, T.H., Flannery, T.F., Trusler, P., Kool, L., van Klaveren, N., and Vickers−Rich, P. 2001. A second placental mammal from the Early Cretaceous Flat Rocks site, Victoria, Australia. Records of the Queen Victoria Museum 110: 1–9.
• Rich, T.H. and Vickers−Rich, P. 1999. Palaeobiogeographic implications of Early Cretaceous Australian placental mammals. Indian National Academy of Sciences Proceedings, Part A 65: 315–327.
• Rich, T.H., Vickers−Rich, P., Constantine, A., Flannery, T.F., Kool, L., and van Klaveren, N. 1997. A tribosphenic mammal from the Mesozoic of Australia. Science 278: 1438–1442.
• Rich, T.H., Vickers−Rich, P., Constantine, A., Flannery, T.F., Kool, L., and van Klaveren, N. 1999. Early Cretaceous mammals from Flat Rocks, Victoria, Australia.Records of the Queen Victoria Museum 106: 1–35.
• Rougier, G.W. 1993. Vincelestes neuquenianus Bonaparte (Mammalia, Theria) un primitivo mamífero del Cretácico Inferior de la Cuenca Neuquina. 720 pp. Ph.D. dissertation, Universidad Nacional de Buenos Aires, Buenos Aires.
• Rougier, G.W., Wible, J.R., and Hopson, J.A. 1996. Basicranial anatomy of Priacodon fruitaensis (Triconodontidae, Mammalia) from the Late Jurassic of Colorado, and a reappraisal of mammaliaform interrelationships. American Museum Novitates 3183: 1–38.
• Rougier, G.W., Wible, J.R., and Novacek, M.J. 1998. Implications of Deltatheridium specimens for early marsupial history. Nature 396: 459–463.
• Rowe, T.B. 1988. Definition, diagnosis, and origin of Mammalia. Journal of Vertebrate Paleontology 8: 241–264.
• Scotese, C.R. 1997. Paleogeographic Atlas, PALEOMAP Progress Report 90−0497. 45 pp. Department of Geology, University of Texas at Arlington, Arlington.
• Sigogneau−Russell, D. 1998. Discovery of a Late Jurassic Chinese mammal in the upper Bathonian of England. Comptes Rendus de l’Académie des Sciences, Paris 327: 571–576.
• Sigogneau−Russell, D. 1999. Réévaluation des Peramura (Mammalia, Theria) sur la base de nouveaux spécimens du Crétacé inférieur d’Angleterre et du Maroc. Geodiversitas 21: 93–127.
• Sigogneau−Russell, D., Dashzeveg, D., and Russell, D.E. 1992. Further data on Prokennalestes(Mammalia, Eutheria inc. sed.) from the Early Cretaceous of Mongolia. Zoologica Scripta 21: 205–209.
• Sigogneau−Russell, D., Hooker, J.J., and Ensom. P.C. 2001. The oldest tribosphenic mammal from Laurasia (Purbeck Limestone Group, Berrasian, Cretaceous, UK) and its bearing on the “dual origin” of Tribosphenida. Comptes Rendus de l’Académie des Sciences, Paris 333:141–147.
• Simpson, G.G. 1928. A Catalogue of the Mesozoic Mammalia in the Geological Department of the British Museum. x + 215 pp. Trustees of the British Museum, London.
• Simpson, G.G. 1929. American Mesozoic Mammalia. Memoirs of the Peabody Museum of Yale University 3: 1–235.
• Smith, A.G., Smith, D.G., and Funnell, B.M. 1994. Atlas of Mesozoic and Cenozoic Coastlines. ix + 99 pp. Cambridge University Press, Cambridge.
• Wang, Y.−Q., Clemens, W.A., Hu, Y.−M., and Li, C.−K. 1998. A probable pseudo−tribosphenic upper molar from the Late Jurassic of China and the early radiation of the Holotheria. Journal of Vertebrate Paleontology 18: 777–787.
• Wible, J.R., Rougier, G.W., Novacek, M.J., McKenna, M.C., and Dashzeveg, D. 1995. A mammalian petrosal from the Early Cretaceous of Mongolia: implications for the evolution of the ear region and mammaliamorph relationships. American Museum Novitates 3149: 1–19.