A new species from an ornithuromorph (Aves: Ornithothoraces) dominated locality of the Jehol Biota
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We report on a new species of ornithuromorph bird, Iteravis huchzermeyeri gen. et sp. nov., from the previously unreported Sihedang locality of the Lower Cretaceous Yixian Formation, the oldest ornithuromorph bearing deposit in the world. Unlike most other Cretaceous localities, specimens from this new quarry are largely referable to Ornithuromorpha, similar to the Lower Cretaceous Aptian Xiagou Formation in Gansu Province. Also similar to the Xiagou avifauna, the fauna at Sihedang is largely dominated by a single taxon (described here). Differences in faunal dominance may suggest the Sihedang records a unique ecological habitat. This may also explain the dominance of Gansus in the younger Xiagou Formation locality and suggests that previous hypotheses regarding the shift in dominance between Enantiornithes and Ornithuromorpha need to be reassessed in terms of potential ecological biases due to limited sampling. Furthermore, the recognition of an ornithuromorph dominated locality in the Sihedang significantly weakens the signal of such an inferred trend. Compared to most Jehol birds, the new specimen is relatively better preserved in three dimensions revealing morphological details of the skeleton, as well as preserves feather impressions including a rectricial morphology previously unknown among Mesozoic birds.
KeywordsEarly Cretaceous Sihedang Ornithuromorpha Aves Tail feathers
This work was supported by the National Basic Research Program of China (2012CB821906), and the National Natural Science Foundation of China (41172020).
Conflict of interest
The authors declare that they have no conflict of interest.
- 1.Zhou Z, Zhang F (2006) Mesozoic birds of China-a synoptic review. Vert PalAsiat 44:74–98Google Scholar
- 2.Chiappe LM (2007) Glorified dinosaurs: the origin and early evolution of birds. Wiley, New YorkGoogle Scholar
- 3.Hou L, Zhou Z, Gu Y et al (1999) Confuciusornis sanctus, a new Late Jurassic sauriurine bird from China. Chin Sci Bull 40:1545–1551Google Scholar
- 5.Hou L, Liu Z (1984) A new fossil bird from Lower Cretaceous of Gansu and early evolution of birds. Sci Sin Ser B 27:1296–1301Google Scholar
- 9.Swisher CC III, Wang X, Zhou Z et al (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 47:135–138Google Scholar
- 14.Zhou S, Zhou Z, O’Connor JK (2010) A new toothless ornithurine bird (Schizooura lii gen. et sp. nov.) from the Lower Cretaceous of China. Vert PalAsiat 50:9–24Google Scholar
- 23.O’Connor JK, Chiappe LM, Bell A (2011) In: Dyke GD, Kaiser G (eds) Living dinosaurs: the evolutionary history of birds. Wiley, New Jersey, pp 39–114Google Scholar
- 25.Hu H, Zhou Z, O’Connor JK (2014) A subadult specimen of Pengornis and character evolution in Enantiornithes. Vert PalAsiat 52:77–97Google Scholar
- 30.Lamanna MC, You H, Harris JD et al (2006) A partial skeleton from the Early Cretaceous of northwestern China. Acta Palaeontol Pol 51:423–434Google Scholar
- 31.Suarez MB, Ludvigson GA, González LA et al (2013) Stable isotope chemostratigraphy in lacustrine strata of the Xiagou Formation, Gansu Province, NW China. In: Bojar AV, Melinte-Dobrinescu MC, Smit J (eds) Isotopic studies in cretaceous research. Geological Society, Special Publications, London, pp 143–155Google Scholar
- 32.Chang M, Chen P, Wang Y et al (2003) The Jehol Biota. Shanghai Scientific and Technical Publishers, ShanghaiGoogle Scholar
- 33.Feduccia A (1996) The origin and evolution of birds. Yale University Press, New HavenGoogle Scholar
- 35.Gill FB (2007) Ornithology, 3rd edn. Freeman, New YorkGoogle Scholar
- 36.Chiappe LM, Zhao B, O’Connor JK et al (2014) A new specimen of the early cretaceous bird Hongshanornis longicresta: insights into the aerodynamics and diet of a basal ornithuromorph. Peer J 2:e234Google Scholar