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Naturwissenschaften

, Volume 91, Issue 10, pp 455–471 | Cite as

The origin and early evolution of birds: discoveries, disputes, and perspectives from fossil evidence

  • Zhonghe ZhouEmail author
Review
First Online:

Abstract

The study of the origin and early evolution of birds has never produced as much excitement and public attention as in the past decade. Well preserved and abundant new fossils of birds and dinosaurs have provided unprecedented new evidence on the dinosaurian origin of birds, the arboreal origin of avian flight, and the origin of feathers prior to flapping flight. The Mesozoic avian assemblage mainly comprises two major lineages: the prevalent extinct group Enantiornithes, and the Ornithurae, which gave rise to all modern birds, as well as several more basal taxa. Cretaceous birds radiated into various paleoecological niches that included fish- and seed-eating. Significant size and morphological differences and variation in flight capabilities, ranging from gliding to powerful flight among early birds, highlight the diversification of birds in the Early Cretaceous. There is little evidence, however, to support a Mesozoic origin of modern avian groups. Controversy and debate, nevertheless, surround many of these findings, and more details are needed to give a better appreciation of the significance of these new discoveries.

Keywords

Early Cretaceous Yixian Formation Early Bird Theropod Dinosaur Modern Bird 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgements

I thank the following persons for providing valuable suggestions and field support for my work on Mesozoic birds over the past years: Meemann Zhang, Lianhai Hou, Fan Jin, Jiangyong Zhang, Xiaolin Wang, Xing Xu, Fucheng Zhang, Yaoming Hu, Yuanqing Wang, Yuan Wang, Chun Li, and Zilu Tang from the IVPP. I also benefited from help and valuable discussions on early avian evolution with many other colleagues during the course of my research over the past years: Larry D. Martin, Alan Feduccia, Luis M. Chiappe, Lawrence Witmer, John Ostrom, Peter Wellnhofer, Evgeny Kurochkin, Storrs Olson, Jim Farlow, Andrzej Elzanowski, Mark Norell, Philip Currie, Paul Sereno, Julia Clarke, Jim Clark, Joel Cracraft, Catherine Forster, Jacques Gauthier, Per Ericson, Stefan Peters, Desui Miao, and Rick Prum. Fan Jin and Jiangyong Zhang also provided insights on the recognition of fish remains in the stomach of Yanornis. Yutong Li, Yan Li, and Huaquan Shou prepared many of the specimens. I also benefited greatly from invaluable critical comments from four anonymous referees. Paul Barrett provided some advice on the final manuscript and improved the English. This work was supported by the National Natural Science Foundation of China, Special Funds for Major State Basic Research Projects of China (TG2000077700), and the Chinese Academy of Sciences.

References

  1. Alonso PD, Milner AC, Ketcham RA, Cookson MJ, Rowe TB (2004) The avian nature of the brain and inner ear of Archaeopteryx. Nature 430:666–669CrossRefPubMedGoogle Scholar
  2. Bakhurina NN, Unwin DM (1995) A survey of pterosaurs from the Jurassic and Cretaceous of the Former Soviet Union and Mongolia. Hist Biol 10:197–245Google Scholar
  3. Barsbold R, Currie P, Myhrvold NP, Osmólska H, Tsogtbaatar K, Watabe M (2000) A pygostyle from a non-avian theropod. Nature 403:155–156CrossRefPubMedGoogle Scholar
  4. Beebe CW (1915) A tetrapteryx stage in the ancestry of birds. Zoologica, New YorkGoogle Scholar
  5. Bock WJ (1985) The arboreal theory for the origin of birds. In: Hecht MK, Ostrom JH, Viohl G, Wellnhofer P (eds) The beginnings of birds. Proceedings of International Archaeopteryx Conference, Eichstätt. Freunde des Jura-Museums, Eichstätt, Germany, pp 199–207Google Scholar
  6. Bock WJ (1986) The arboreal origin of avian flight. Mem Calif Acad Sci 8:57–72Google Scholar
  7. Bock WJ (1997) Review of ‘The origin and evolution of birds’, by A. Feduccia. Auk 114:531–534Google Scholar
  8. Burgers P, Chiappe LM (1999) The wing of Archaeopteryx as a primary thrust generator. Nature 399:60–62CrossRefGoogle Scholar
  9. Burke AC, Feduccia A (1997) Developmental patterns and the identification of the homologies in the avian hand. Science 278:666–669CrossRefGoogle Scholar
  10. Burnham DA, Derstler KL, Currie PJ, Bakker RT, Zhou Z, Ostrom JH (2000) Remarkable new bird-like dinosaur (Theropoda: Maniraptora) from the Upper Cretaceous of Montana. Special Publication of the Paleontological Institute, University of Kansas, Lawrence, Kan., USAGoogle Scholar
  11. Chatterjee S (1991) Cranial anatomy and relationships of a new Triassic bid from Texas and the origin of tyrannosaurs. Philos Trans R Soc Lond B 332:277–342Google Scholar
  12. Chatterjee S (1997) The rise of birds. Johns Hopkins University Press, Baltimore, Md., USAGoogle Scholar
  13. Chatterjee S (1999) Protoavis and the early evolution of birds. Palaeontographica A 254:1–100Google Scholar
  14. Chatterjee S (2002) The morphology and systematics of Polarornis, a Cretaceous loon (Aves: Gaviidae) from Antarctica. In: Zhou Z, Zhang F (eds) Proceedings of the 5th symposium of the Society of Avian Paleontology and Evolution, Beijing, June 1–6, 2000. Science Press, Beijing, pp 125–155Google Scholar
  15. Chatterjee S (2003) The flight of Archaeopteryx. Naturwissenschaften 90:27–32PubMedGoogle Scholar
  16. Chen P, Dong Z, Zhen S (1998) An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China. Nature 391:147–152CrossRefGoogle Scholar
  17. Chiappe LM (1995) The first 85 million years of avian evolution. Nature 378:349–354CrossRefGoogle Scholar
  18. Chiappe LM (1997) Climbing Archaeopteryx? A response to Yalden. Archaeopteryx 15:109–112Google Scholar
  19. Chiappe LM (2001) Phylogenetic relationships among basal birds. In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA, pp 125–139Google Scholar
  20. Chiappe LM, Dyke GJ (2002) The Mesozoic radiation of birds. Annu Rev Ecol Syst 33:91–124CrossRefGoogle Scholar
  21. Chiappe LM, Lacasa-Ruiz A (2002) Noguerornis gonzalezi (Aves: Ornithothoraces) from the Early Cretaceous of Spain. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 230–239Google Scholar
  22. Chiappe LM, Walker CA (2002) Skeletal morphology and systematics of the Cretaceous euenantiornithes (Ornithothoraces: Enantiornithes). In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 240–267Google Scholar
  23. Chiappe LM, Witmer LM (eds) (2002) Mesozoic birds above the head of dinosaurs. University of California Press, Berkeley, Calif., USAGoogle Scholar
  24. Chiappe LM, Norell MA, Clark JM (1995) Comment on Wellnhofer’s new data on the origin and early evolution of birds. C R Acad Sci Paris 320:1031–1032Google Scholar
  25. Chiappe LM, Norell MA, Clark JM (1997) Mononykus and birds: methods and evidence. Auk 14(2):300–302Google Scholar
  26. Chiappe LM, Norell MA, Clark JM (1998) The skull of a relative of the stem-group bird Mononykus. Nature 392:275–278CrossRefGoogle Scholar
  27. Chiappe LM, Ji S, Ji Q, Norell MA (1999) Anatomy and systematics of the Confuciusornithidae (Aves) from the Mesozoic of Northeastern China. Am Mus Novit 242:1–89Google Scholar
  28. Chiappe LM, Norell MA, Clark JM (2001) A new skull of Gobipteryx minuta (Aves: Enantiornithes) from the Cretaceous of the Gobi Desert. Am Mus Novit 3346:1–15CrossRefGoogle Scholar
  29. Chiappe LM, Lamb JP Jr, Ericson PG (2002a) New enantiornithine bird from the marine Upper Cretaceous of Alabama. J Vertebr Paleontol 22(1):170–174Google Scholar
  30. Chiappe LM, Norell MA, Clark JM (2002b) The Cretaceous, short-armed Alvarezsauridae: Mononykus and its kin. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 87–120Google Scholar
  31. Chinsamy A (2002) Bone microstructure of early birds. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 421–431Google Scholar
  32. Clark JM, Hopson JA, Hernandez R, Fastovsky DE, Montellano M (1998) Foot posture in a primitive pterosaur. Nature 391:886–889CrossRefGoogle Scholar
  33. Clark JM, Norell MA, Chiappe LM (1999) An oviraptorid skeleton from the Late Cretaceous of Ukhaa Tolgod, Mongolia, preserved in an Avian-like brooding position over an oviraptorid nest. Am Mus Novit 3265:1–36Google Scholar
  34. Clark JM, Norell MA, Barsbold R (2001) Two new oviraptorids (Theropoda: Oviraptorosauria), Upper Cretaceous Djadokhta Formation, Ukhaa Tolgod, Mongolia. J Vertebr Paleontol 21:209–213Google Scholar
  35. Clark JM, Norell MA, Makovicky PJ (2002) Cladistic approaches to the relationships of birds to other theropod dinosaurs. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA., pp 31–61Google Scholar
  36. Clarke JA, Chiappe LM (2001) A new carinate bird from the Late Cretaceous of Patagonia (Argentina). Am Mus Novit 3323:1–23CrossRefGoogle Scholar
  37. Cooper A, Penny D (1997) Mass survival of birds across the Cretaceous-Tertiary boundary: molecular evidence. Science 275:1109–1113CrossRefPubMedGoogle Scholar
  38. Cracraft J (2001) Avian evolution, Gondwana biogeography and the Cretaceous-Tertiary mass extinction event. Proc R Soc Lond Ser B 268:459–469CrossRefGoogle Scholar
  39. Dahn RD, Fallon JF (2000) Interdigital regulation of digit identity and homeotic transformation by modulated BMP signaling. Science 289:438–441CrossRefPubMedGoogle Scholar
  40. Dial K D (2003) Wing-assisted incline running and the evolution of flight. Science 299:402–404CrossRefPubMedGoogle Scholar
  41. Dingus L, Rowe T (1997) The mistaken extinction: dinosaur evolution and the origin of birds. WH Freeman, New YorkGoogle Scholar
  42. Drossopoulou G, Lewis KE, Sanz-Ezquerro JJ, Nikbakht N, McMahon AP, Hofmann C, Tickle C (2000) A model for anteroposterior patterning of the vertebrate limb based on sequential long- and short-range Shh signaling and Bmp signalling. Development 127:1337–1348PubMedGoogle Scholar
  43. Dyke GJ, Mayr G (1999) Did parrots exist in the Cretaceous period? Nature 399:317–318CrossRefGoogle Scholar
  44. Elzanowski A (1999) A comparison of the jaw skeleton in theropods and birds, with a description of the palate in the Oviraptoridae. In: Olson SL (ed) Avian Paleontology at the close of the 20th century: Proceedings of the 4th International meeting of the Society for Avian Paleontology and Evolution, Washington, D.C., 4–7 June 1996. Smithson Contrib Paleobiol 89:311–323Google Scholar
  45. Elzanowski A (2001) A new genus and species or the largest specimen of Archaeopteryx. Acta Palaeontol Pol 41(4):519–532Google Scholar
  46. Ericson PGP, Christidis L, Cooper A, Irestedt M, Jackson J, Johansson US, Norman JA (2001) A Gondwanan origin of passerine birds supported by DNA sequences of the endemic New Zealand wrens. Proc R Soc Lond Ser B 269:235–241CrossRefGoogle Scholar
  47. Feduccia A (1993) Evidence from claw geometry indicating arboreal habits of Archaeopteryx. Science 259:790–793Google Scholar
  48. Feduccia A (1995) Explosive evolution in Tertiary birds and mammals. Science 267:637–638Google Scholar
  49. Feduccia A (1996) The origin and evolution of birds. Yale University Press, New Haven, Conn., USAGoogle Scholar
  50. Feduccia A (1999a) The origin and evolution of birds, 2nd edn. Yale University Press, New Haven, Conn., USAGoogle Scholar
  51. Feduccia A (1999b) 1,2,3=2,3,4: accommodating the cladogram. Proc Natl Acad Sci USA 96:4740–4742CrossRefPubMedGoogle Scholar
  52. Feduccia A (2002) Birds are dinosaurs: simple answer to a complex problem. Auk 119(4):1187–1201Google Scholar
  53. Feduccia A (2003) ‘Big bang’ for tertiary birds? Trends Ecol Evol 18(4):172–176CrossRefGoogle Scholar
  54. Feduccia A, Nowicki J (2002) The hand of birds revealed by early ostrich embryos. Naturwissenschaften 89:391–393CrossRefPubMedGoogle Scholar
  55. Fisher HI (1946) Adaptations and comparative anatomy of the locomotor apparatus of New World vultures. Am Midl Nat 35:545–727Google Scholar
  56. Forster CA, Chiappe LM, Krause DW, Sampson SD (1996) The first Cretaceous bird from Madagascar. Nature 382:532–534CrossRefGoogle Scholar
  57. Forster CA, Sampson SD, Chiappe LM, Krause DW (1998) The theropod ancestry of birds: new evidence from the Late Cretaceous of Madagascar. Science 279:1915–1919CrossRefPubMedGoogle Scholar
  58. Galis F, Kundrát M, Sinervo B (2003) An old controversy solved: bird embryos have five fingers. Trends Ecol Evol 18(1):7–9CrossRefGoogle Scholar
  59. Gatesy SM, Dial KP (1996) Locomotor modules and the evolution of avian flight. Evolution 50(1):331–340Google Scholar
  60. Gauthier J (1986) Saurischian monophyly and the origin of birds. In: Padian K (ed) The origin of birds and the evolution of flight. Mem Calif Acad Sci 8:1–55Google Scholar
  61. He H, Wang X, Zhou Z, Wang F, Boven A, Si G, Zhu R (2004) Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China and its implication. Geophys Res Lett 31:L12605Google Scholar
  62. Hedges SB, Parker PH, Sibley CG, Kumar S (1996) Continental breakup and the ordinal diversification of birds and mammals. Nature 381:226–229CrossRefPubMedGoogle Scholar
  63. Heilmann G (1926) The origin of birds. Witherby, LondonGoogle Scholar
  64. Hinchliffe R (1997) The forward march of the bird-dinosaurs halted? Science 278:596–597CrossRefGoogle Scholar
  65. Hope S (2002) The Mesozoic radiation of Neornithes. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 339–388Google Scholar
  66. Hopson JA (2001) Ecomorphology of avian and theropod phalangeal proportions: implications for the arboreal versus terrestrial origin of bid flight. In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA, pp 211–235Google Scholar
  67. Hou L (1997) Mesozoic birds of China. Feng-Huang-Ku Bird Park of Taiwan, Nantou, TaiwanGoogle Scholar
  68. Hou L, Chen P (1999) Liaoxiornis delicatus gen. et sp. nov., the smallest Mesozoic bird. Chin Sci Bull 44:834–838Google Scholar
  69. Hou L, Liu Z (1984) A new fossil bird from Lower Cretaceous of Gansu and early evolution of birds. Sci Sin Ser B 27:1296–1302Google Scholar
  70. Hou L, Zhou Z, Martin LD, Feduccia A (1995) A beaked bird from the Jurassic of China. Nature 377:616–618CrossRefGoogle Scholar
  71. Hou L, Martin LD, Zhou Z, Feduccia A (1996) Early adaptive radiation of birds: evidence from fossils from northeastern China. Science 274:1164–1167CrossRefPubMedGoogle Scholar
  72. Hou L, Martin LD, Zhou Z, Feduccia, A (1999a) Archaeopteryx to opposite birds: missing link from the Mesozoic of China. Vertebr PalAsiatica 37(2):88–95Google Scholar
  73. Hou L, Martin LD, Zhou Z, Feduccia A, Zhang F (1999b) A diapsid skull in a new species of the primitive bird Confuciusornis. Nature 399:679–682CrossRefGoogle Scholar
  74. Hou L, Chiappe LM, Zhang F, Chuong CM (2004) New Early Cretaceous fossil from China documents a novel trophic specialization for Mesozoic birds. Naturwissenschaften 91:22–25CrossRefPubMedGoogle Scholar
  75. Huxley TH (1868) On the animals which are most nearly intermediate between the birds and reptiles. Annu Mag Nat Hist 2:66–75Google Scholar
  76. Jensen JA, Padian K (1989) Small pterosaurs and dinosaurs from the Uncompahgre fauna (Brushy Basin Member, Morrison Formation: ?Tithonian), Late Jurassic, western Colorado. J Paleontol 63:364–373Google Scholar
  77. Ji Q, Currie PJ, Norell MA, Ji S (1998) Two feathered dinosaurs from northeastern China. Nature 393:753–761CrossRefGoogle Scholar
  78. Ji Q, Chiappe LM, Ji S (1999) A new Late Mesozoic confuciusornithid bird from China, J Vertebr Paleontol 19(1):1–7Google Scholar
  79. Jones TD, Farlow JO, Ruben JA, Henderson DM, Hillenius WJ (2000a) Cursoriality in bipedal archosaurs. Nature 406:716–718CrossRefPubMedGoogle Scholar
  80. Jones TD, Ruben JA, Martin LD, Kurochkin EN, Feduccia A, Maderson PFA, Hillenius WJ, Geist NR, Alifanov V (2000b). Nonavian feathers in a Late Triassic archosaur. Science 288:2202–2205CrossRefPubMedGoogle Scholar
  81. Kumar S, Hedges B (1998) A molecular timescale for vertebrate evolution. Nature 392:917–920CrossRefPubMedGoogle Scholar
  82. Kundrát M, Seichert V, Russell AP, Smetana K Jr (2002) Pentadactyl pattern of the avian wing autopodium and pyramid reduction hypothesis. J Exp Zool (Mol Dev Evol) 294:152–159Google Scholar
  83. Kurochkin EN (1985) A true carinate bird from Lower Cretaceous deposits in Mongolia and other evidence of Early Cretaceous birds in Asia. Cretaceous Res 6:271–278Google Scholar
  84. Kurochkin EN (1999) The relationships of the early Cretaceous Ambiortus and Otogornis (Aves: Ambiortiformes). In: Olson SL (ed) Avian paleontology at the close of the 20th century: Proceedings of the 4th international meeting of the Society for Avian Paleontology and Evolution, Washington, D.C., 4–7 June 1996. Smithson Contrib Paleobiol 89:275–284Google Scholar
  85. Lim J, Zhou Z, Martin LD, Baek KS, Yang SY (2000) The oldest known tracks of web-footed birds from the lower Cretaceous of South Korea. Naturwissenschaften 87:256–259CrossRefPubMedGoogle Scholar
  86. Lingham-Soliar T (2003) Evolution of birds: ichthyosaur integumental fibers conform to dromaeosaur protofeathers. Naturwissenschaften 90:428–432CrossRefPubMedGoogle Scholar
  87. Lockley MG, Rainforth EC (2002) The track record of Mesozoic birds and pterosaurs: an ichnological and paleoecological perspective. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 405–418Google Scholar
  88. Lü J (2002) A new oviraptorosaurid (Theropoda: Oviraptorosauria) from the Late Cretaceous of Southern China. J Vertebr Paleontol 22:871–875Google Scholar
  89. Lü J, Dong Z, Azuma Y, Barsbold R, Tomida Y (2002) Oviraptorosaurs compared to birds. In: Zhou Z, Zhang F (eds) Proceedings of the 5th symposium of the Society of Avian Paleontology and Evolution, Beijing, June 1–6, 2000. Science Press, Beijing, pp 175–189Google Scholar
  90. Martin LD (1991) Mesozoic birds and the origin of birds. In: Schultze HP, Trueb L (eds) Origin of the higher groups of tetrapods. Comstock, Ithaca, NY, USA, pp 485–540Google Scholar
  91. Martin LD (1995) The Enantiornithes: terrestrial birds of the Mesozoic. In Peters DS (ed) Acta Palaeornithologica: third symposium SAPE; 5 Internationale Senchenberg-Konferenz 22–26 Juni 1992. Courr Forchungsinst Senckenb 181:23–36Google Scholar
  92. Martin LD (1997) The difference between dinosaurs and birds as applied to Mononykus. In Wolberg DL, Stump E, Rosenberg G (eds) Dinofest International: Proceedings of a symposium held at Arizona State University. Academy of Natural Sciences, Philadelphia, Pa., USA, pp 337–343Google Scholar
  93. Martin LD, Zhou Z (1997) Archaeopteryx-like skull in enantiornithine bird. Nature 389:556CrossRefGoogle Scholar
  94. Martin LD, Zhou Z, Hou L, Feduccia A (1998) Confuciusornis sanctus compared to Archaeopteryx lithographica. Naturwissenschaften 85:286–289CrossRefGoogle Scholar
  95. Maryańska T, Osmólska H, Wolsan M (2002) Avialan status for oviratptorosauria. Acta Palaeontol Pol 47(1):97–116Google Scholar
  96. Mayr G, Peters DS, Plodowski G, Vogel O (2002) Bristle-like integumentary structures at the tail of the horned dinosaur Psittacosaurus. Naturwissenschaften 89:361–365CrossRefPubMedGoogle Scholar
  97. Melchor RN, Valais S de, Genise JF (2002) Bird-like fossil footprints from the Late Triassic. Nature 417:936–938CrossRefPubMedGoogle Scholar
  98. Norell MA, Clarke JA (2001) Fossil that fills a critical gap in avian evolution. Nature 409:181–184CrossRefPubMedGoogle Scholar
  99. Norell MA, Makovicky P (1999) Important features of the dromaeosaurid skeleton. Information II: information from a newly collected specimen of Velociraptor mongoliensis. Am Mus Novit 3282:1–45Google Scholar
  100. Norell MA, Makovicky P, Clark JM (1997) A Velociraptor wishbone. Nature 389:447CrossRefGoogle Scholar
  101. Norell MA, Makovicky P, Clark JM (2000) A new troodontid theropod from Ukhaa Tolgod, Mongolia. J Vertebr Paleontol 20(1):7–11Google Scholar
  102. Norell MA, Clark JM, Makovicky P (2001) Phylogenetic relationships among coelurosaurian theropods. In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA. pp 49–67Google Scholar
  103. Norell M, Ji Q, Gao K, Yuan, C, Zhao Y, Wang (2002) ‘Modern’ feathers on a non-avian dinosaur. Nature 416:36–37CrossRefPubMedGoogle Scholar
  104. Novas FE, Pol D (2002) Alvarezsaurid relationship reconsidered. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 121–125Google Scholar
  105. Novas FE, Puerta P (1997) New evidence concerning avian origins from the Late Cretaceous of Patagonia. Nature 387:390–392CrossRefGoogle Scholar
  106. Ostrom JH (1976a) Archaeopteryx and the origin of birds. Biol J Linn Soc 8:91–182Google Scholar
  107. Ostrom JH (1976b) Some hypothetical anatomical stages in the evolution of avian flight. Smithson Contrib Paleobiol 27:1–21Google Scholar
  108. Ostrom JH (1986) The cursorial origin of avian flight. In: Padian K (ed) The origin of birds and the evolution of flight. Mem Calif Acad Sci 8:73–81Google Scholar
  109. Padian K (2001a) Cross-testing adaptive hypotheses: phylogenetic analysis and the origin of bird flight. Am Zool 41:598–607Google Scholar
  110. Padian K (2001b) Stages in the origin of bird flight: beyond the arboreal–cursorial dichotomy. In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA, pp 255–272Google Scholar
  111. Padian K (2003) Four-winged dinosaurs, bird precursors, or neither? BioScience 53:450–452Google Scholar
  112. Padian K, Chiappe LM (1998a) The origin and early evolution of birds. Sci Am 278:28–37PubMedGoogle Scholar
  113. Padian K, Chiappe LM (1998b) The origin of birds and their flight. Biol Rev 73:1–42CrossRefGoogle Scholar
  114. Paul G (2002) Dinosaurs of the air: the evolution and loss of flight in dinosaurs and birds. Johns Hopkins University Press, Baltimore, Md., USAGoogle Scholar
  115. Perle A, Norell MA, Chiappe LM, Clark JM (1993) Flightless bird from the Cretaceous of Mongolia Nature 362:623–626Google Scholar
  116. Peters DS, Ji Q (1998) The diapsid temporal construction of the Chinese fossil bird Confuciusornis. Senckenb Lethaea 78:153–155Google Scholar
  117. Prum RO (2002) Why ornithologists should care about the theropod origin of birds. Auk 119:1–17Google Scholar
  118. Prum RO (2003) Dinosaurs take to the air. Nature 421:323–324CrossRefPubMedGoogle Scholar
  119. Prum RO, Brush AH (2002) The evolutionary origin and diversification of feathers. Q Rev Biol 77:261–295CrossRefPubMedGoogle Scholar
  120. Prum RO, Dyck J (2001) A theoretical framework for studying the development and evolution of feathers. J Morphol 248:273Google Scholar
  121. Ricqlès A de, Padian K, Horner JR (2001) In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA, pp 411–426Google Scholar
  122. Sanz JL, Bonaparte JF (1992) A new order of birds (Class Aves) from the Lower Cretaceous of Spain. Nat Hist Mus Los Angeles C Sci Ser 36:39–49Google Scholar
  123. Sanz JL, Buscalioni AD (1992) A new bird from the Early Cretaceous of Las Hoyas, Spain. Paleontology 35:829–845Google Scholar
  124. Sanz, JL, Chiappe, LM, Buscalioni, AD (1995) The osteology of Concornis lacustris (Aves: Enantiornithes) from the lower Cretaceous of Spain and a re-examination of its phylogenetic relationships. Am Mus Novit 3133:1–23Google Scholar
  125. Sanz JL, Chiappe LM, Pérez-Moreno BP, Buscalioni AD, Moratalla JJ, Ortega F, Poyato-Ariza FJ (1996) An Early Cretaceous bird from Spain and its implications for the evolution of avian flight. Nature 382:442–445CrossRefGoogle Scholar
  126. Sanz JL, Chiappe LM, Pérez-Moreno BP, Moratalla JJ, Hernandéz Carrasquilla F, Buscalioni AD, Ortega F, Poyato-Ariza F, Rasskin-Gutman D, Martínez-Delclòs X (1997) A nestling bird from the Lower Cretaceous of Spain: implications for avian skull and neck evolution. Science 276:1543–1546Google Scholar
  127. Sereno CP (1999) The evolution of dinosaurs. Science 284:2137–2147CrossRefPubMedGoogle Scholar
  128. Sereno CP (2000) Iberomesornis romerali (Aves, Ornithothoraces) reevaluated as an Early Cretaceous enantiornithine. N Jb Geol Palaeontol Abh 215:365–395Google Scholar
  129. Sereno CP (2001) Alvarezsaurids: birds or ornithomimosaurs? In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA, pp 69–98Google Scholar
  130. Sereno PC, Rao C (1992) Early evolution of avian flight and perching: new evidence from the Lower Cretaceous of China. Science 255:845–848Google Scholar
  131. Stidham TA (1998) The lower jaw from a Cretaceous parrot. Nature 396:19–30CrossRefGoogle Scholar
  132. Stidham TA (1999) Reply to GJ Dyke and G Mayr: did parrots exist in the Cretaceous period? Nature 399:318CrossRefGoogle Scholar
  133. Stokstad E (2000) Feathers, or flight of fancy? Science 288:2124–2125CrossRefPubMedGoogle Scholar
  134. Stokstad E (2003) Four-winged dinos create a flutter. Science 299:491CrossRefPubMedGoogle Scholar
  135. Swisher CC III,Wang X, Zhou Z, Wang Y-Q, Jin F, Zhang J, Xu X, Zhang F, Wang Y (2002) Further support for a cretaceous age for the feathered-dinosaur beds of Liaoning, China: new 40Ar/39Ar dating of the Yixian and Tuchengzi Formations. Chin Sci Bull 47(2):135–138Google Scholar
  136. Van Tuinen M, Hedges SB (2001) Calibration of avian molecular clocks. Mol Biol Evol 18:206–213PubMedGoogle Scholar
  137. Wagner GP, Gauthier JA (1999) 1,2,3=2,3,4: A solution to the problem of the homology of the digits in the avian hand. Proc Natl Acad Sci USA 96:5111–5116CrossRefPubMedGoogle Scholar
  138. Walker C (1981) New subclass of birds from the Cretaceous of South America. Nature 292:51–53Google Scholar
  139. Wang X, Zhou Z (2004) Pterosaur embryo from the Early Cretaceous. Nature 429:621CrossRefPubMedGoogle Scholar
  140. Wang X, Zhou Z, Zhang F, Xu X (2002) A nearly completely articulated rhamphorhynchoid pterosaur with exceptionally well-preserved wing membranes and “hairs” from Inner Mongolia, northeast China. Chin Sci Bull 47(3):226–230CrossRefGoogle Scholar
  141. Wellnhofer PA (1992) A new specimen of Archaeopteryx from the Solnhofen Limestone. Nat Hist Mus Los Angeles C Sci Ser 36:3–23Google Scholar
  142. Wellnhofer PA (1994) New data on the origin and early evolution of birds. C R Acad Sci Paris 319:299–308Google Scholar
  143. Witmer LM (2001) The role of Protoavis in the debate on avian origins. In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA, pp 537–548Google Scholar
  144. Witmer LM (2002) The debate on avian ancestry: phylogeny, function, and fossils. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 3–30Google Scholar
  145. Xu X, Wu X (2001) Cranial morphology of Sinornithosaurus millenii (Dinosauria: Theropoda: Dromaeosauridae) from the Yixian Formation of Liaoning, China. Can J Earth Sci 38:1–14CrossRefGoogle Scholar
  146. Xu X, Tang Z, Wang X (1999a) A therizinosaurid dinosaur with integumentary structures from China. Nature 399:350–354CrossRefGoogle Scholar
  147. Xu X, Wang X, Wu X (1999b) A dromaeosaurid dinosaur with a filamentous integument from the Yixian Formation of China. Nature 401:262–266CrossRefGoogle Scholar
  148. Xu X, Zhou Z, Wang X (2000) The smallest known non-avian theropod dinosaur. Nature 408:705–708CrossRefPubMedGoogle Scholar
  149. Xu X, Zhou Z, Prum RO (2001) Branched integumental structures in Sinornithosaurus and the origin of feathers. Nature 410:200–204CrossRefPubMedGoogle Scholar
  150. Xu X, Norell MA, Wang X, Makovicky PJ, Wu X (2002) A basal troodontid from the Early Cretaceous of China. Nature 415:780–784PubMedGoogle Scholar
  151. Xu X, Zhou Z, Wang X, Kuang X, Zhang F, Du X (2003) Four-winged dinosaurs from China. Nature 421:335–340CrossRefPubMedGoogle Scholar
  152. Yalden DW (1997) Climbing Archaeopteryx. Archaeopteryx 15:107–108Google Scholar
  153. Zhang F, Zhou Z (2000) A primitive enantiornithine bird and the origin of feathers. Science 290:1955-1959CrossRefPubMedGoogle Scholar
  154. Zhang F, Zhou Z, Hou L, Gu G (2001) Early diversification of birds: evidence from a new opposite bird. Chin Sci Bull 46(11):945–949Google Scholar
  155. Zhang F, Zhou Z, Xu X, Wang X (2002) A juvenile coelurosaurian theropod from China indicates arboreal habits. Naturwissenschaften 89:394–398CrossRefPubMedGoogle Scholar
  156. Zhang J (2002) Discovery of Daohugou biota (pre-Jehol biota) with a discussion on its geological age. J Stratigr 26(3):174–178Google Scholar
  157. Zhou Z (1995a) Discovery of a new enantiornithine bird from the Early Cretaceous of Liaoning, China. Vertebr PalAsiatica 33(2):99–113Google Scholar
  158. Zhou Z (1995b) Is Mononykus a bird? Auk 112:958–963Google Scholar
  159. Zhou Z (2002) A new and primitive enantiornithine bird from the Early Cretaceous of China. J Vertebr Paleontol 22 (1):49–57Google Scholar
  160. Zhou Z, Farlow JO (2001) Flight capability and habits of Confuciusornis. In: Gauthier J, Gall LF (eds) New perspectives on the origin and early evolution of birds. Special Publication of the Peabody Museum of Natural History, Yale University, New Haven, Conn., USA, pp 237-254Google Scholar
  161. Zhou Z, Hou L (1998) Confuciusornis and the early evolution of birds. Vertebr PalAsiatica 36(2):136–146Google Scholar
  162. Zhou Z, Hou L (2002) The discovery and study of Mesozoic birds in China. In: Chiappe LM, Witmer LM (eds) Mesozoic birds above the heads of dinosaurs. University of California Press, Berkeley, Calif., USA, pp 160–183Google Scholar
  163. Zhou Z, Wang X (2000) A new species of Caudipteryx from the Yixian Formation of Liaoning, Northeast China. Vertebr PalAsiatica 38(2):111–127Google Scholar
  164. Zhou Z, Zhang F (2001a) Two new ornithurine birds from the Early Cretaceous of western Liaoning, China. Chin Sci Bull 46:1258–1264Google Scholar
  165. Zhou Z, Zhang F (2001b) Origin of feathers: perspectives from fossil evidence. Sci Prog 84(2):87–104Google Scholar
  166. Zhou Z, Zhang F (2002a) A long-tailed, seed-eating bird from the Early Cretaceous of China. Nature 418:405-409CrossRefPubMedGoogle Scholar
  167. Zhou Z, Zhang F (2002b) Largest bird from the Early Cretaceous and its implications for the earliest avian ecological diversification. Naturwissenschaften 89:34–38CrossRefPubMedGoogle Scholar
  168. Zhou Z, Zhang F (2003a) Jeholornis compared to Archaeopteryx, with a new understanding of the earliest avian evolution. Naturwissenschaften 90:220–225PubMedGoogle Scholar
  169. Zhou Z, Zhang F (2003b) Anatomy of the primitive bird Sapeornis chaoyangensis from the Early Cretaceous of Liaoning, China. Can J Earth Sci 40:731–747CrossRefGoogle Scholar
  170. Zhou Z, Wang X, Zhang F, Xu X (2000) Important features of Caudipteryx: evidence from two nearly complete new specimens. Vertebr PalAsiatica 38(4):241–254Google Scholar
  171. Zhou Z, Zhang F, Clarke J (2002) Archaoraptor’s better half. Nature 420:285CrossRefPubMedGoogle Scholar
  172. Zhou Z, Barrett PM, Hilton J (2003) An exceptionally preserved Lower Cretaceous ecosystem. Nature 421:807–814CrossRefPubMedGoogle Scholar

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© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijingChina

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