Chinese Science Bulletin

, Volume 46, Issue 11, pp 945–949 | Cite as

Early diversification of birds: Evidence from a new opposite bird

  • Fucheng Zhang
  • Zhonghe Zhou
  • Lianhai Hou
  • Gang Gu
Notes

Abstract

A new enantiornithine birdLongipteryx chaoyangensis gen. et sp. nov. is described from the Early Cretaceous Jiufotang Formation in Chaoyang, western Liaoning Province. This new bird is distinguishable from other known enantiornithines in having uncinate processes in ribs, elongate jaws, relatively long wings and short hindlimbs, and metatarsal IV longer than metatarsals II and III. This new bird had probably possessed (i) modern bird-like thorax which provides firm attachment for muscles and indicates powerful and active respiratory ability; (ii) powerful flying ability; (iii) special adaptation for feeding on aquatic preys; and (iv) trochleae of metatarsals I–IV almost on brate heterocoelous. Distal region of sternum with well developed carina and lateral processes. Uncinate processes present but not fused with ribs. At least 6 rows of gastraliae present. Carpometacarpus not completely fused, minor metacarpal longer than major one; second phalanx the same level, an adaptation for perching. The new bird represents a new ecological type different from all known members of Enantiornithes. It shows that enantiornithines had probably originated earlier than the Early Cretaceous, or this group had experienced a rapid radiation right after it first occurred in the early Early Cretaceous.

Keywords

Enantiornithes Early Cretaceous radiation 

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Copyright information

© Science in China Press 2001

Authors and Affiliations

  • Fucheng Zhang
    • 1
  • Zhonghe Zhou
    • 1
  • Lianhai Hou
    • 1
  • Gang Gu
    • 2
  1. 1.Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijingChina
  2. 2.Institute of Archaeology of Liaoning ProvinceShenyangChina

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