Reference health
The oldest record of ornithuromorpha from the early cretaceous of China
26/26 checkable references clean · checked 2026-07-14
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a publisher retraction, withdrawal, or removal notice.
10 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 26 checked references that resolve
resolves10.7717/peerj.234
A new specimen of the Early Cretaceous bird
<i>Hongshanornis longicresta</i>
: insights into the aerodynamics and diet of a basal ornithuromorph
resolves10.1016/S0016-7878(08)80302-1
The remarkable fossils from the Early Cretaceous Jehol Biota of China and how they have changed our knowledge of Mesozoic life
resolves10.1016/j.cretres.2013.03.007
The Jehol Biota: Definition and distribution of exceptionally preserved relicts of a continental Early Cretaceous ecosystem
resolves10.1007/s11434-008-0209-5
On the horizon of Protopteryx and the early vertebrate fossil assemblages of the Jehol Biota
resolves10.1029/2005GC001083
The<sup>40</sup>Ar/<sup>39</sup>Ar dating of the early Jehol Biota from Fengning, Hebei Province, northern China
resolves10.1007/s11430-008-0050-3
A primitive confuciusornithid bird from China and its implications for early avian flight
resolves10.1111/bij.12313
Insights into the evolution of rachis dominated tail feathers from a new basal enantiornithine (Aves: Ornithothoraces)
resolves10.1073/pnas.0507106102
Discovery of an ornithurine bird and its implication for Early Cretaceous avian radiation
resolves10.1080/02724631003617498
A new ornithuromorph (Aves: Ornithothoraces) bird from the Jehol Group indicative of higher-level diversity
resolves10.1080/14772019.2012.690455
A redescription of<i>Chaoyangia beishanensis</i>(Aves) and a comprehensive phylogeny of Mesozoic birds
resolves10.1111/j.1463-6409.2006.00234.x
A beaked basal ornithurine bird (Aves, Ornithurae) from the Lower Cretaceous of China
resolves10.1111/j.1469-7580.2006.00534.x
Insight into the evolution of avian flight from a new clade of Early Cretaceous ornithurines from China and the morphology of <i>Yixianornis grabaui</i>
resolves10.1038/382442a0
An Early Cretaceous bird from Spain and its implications for the evolution of avian flight
resolves10.1002/gj.1057
Feathers and ‘feather‐like’ integumentary structures in Liaoning birds and dinosaurs
resolves10.3390/geosciences2030157
Homology and Potential Cellular and Molecular Mechanisms for the Development of Unique Feather Morphologies in Early Birds
resolves10.1038/nature13467
New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers
resolves10.1007/s11430-010-4094-9
Vertebrate diversity of the Jehol Biota as compared with other lagerstätten
resolves10.1126/science.1126377
A Nearly Modern Amphibious Bird from the Early Cretaceous of Northwestern China
resolves10.1206/0003-0082(2006)3545[1:ANDTFU]2.0.CO;2
A New Dromaeosaurid Theropod from Ukhaa Tolgod (Ömnögov, Mongolia)
resolves10.1080/02724634.2009.10010371
Phylogenetic support for a specialized clade of Cretaceous enantiornithine birds with information from a new species
The 10 references without a DOI — listed, not checked
no DOI — not checkedZhou, Z. & Zhang, F. Mesozoic birds of China—a synoptic review. Vertebr. Palasiat. 44, 74–98 (2006).
no DOI — not checkedZheng, X., O’Connor, J. K., Wang, X., Zhang, X. & Wang, Y. New information on Hongshanornithidae (Aves: Ornithuromorpha) from a new subadualt specimen. Vertebr. Palasiat. 52, 217–232 (2014).
no DOI — not checkedLi, L., Wang, J. & Hou, S. A new ornithurine bird (Hongshanornithidae) from the Jiufotang Formation of Chaoyang, Liaoning, China. Vertebr. Palasiat. 49, 195–200 (2011).
no DOI — not checkedZhou, S., Zhou, Z. & O’Connor, J. K. A new basal beaked ornithurine bird from the Lower Cretaceous of western Liaoning, China. Vertebr. Palasiat. 50, 9–24 (2012).
no DOI — not checkedChiappe, L. M. & Walker, C. A. in: Mesozoic Birds: Above the Heads of Dinosaurs eds Chiappe L. M., Witmer L. M. 240–267University of California (2002).
no DOI — not checkedWang, M. Taxonomical Revision, Ontogenetic, Ecological and Phylogenetic Analyses of Enantiornithes (Aves: Ornithothoraces) of China University of Chinese Academy of Sciences (2014).
no DOI — not checkedWang, M., Zhou, Z., O’Connor, J. K. & Zelenkov, N. V. A new diverse enantiornithine family (Bohaiornithidae fam. nov.) from the Lower Cretaceous of China with information from two new species. Vertebr. Palasiat. 52, 31–76 (2014).
no DOI — not checkedZhou, Z., Zhang, F. & Li, Z. A new basal ornithurine bird (Jianchangornis microdonta gen. et sp. nov.) from the lower cretaceous of China. Vertebr. Palasiat. 47, 299–310 (2009).
no DOI — not checkedLiu, Y., Li, P. & Tian, S. SHRIMP U-Pb zircon age of Later Mesozoic tuff (lava) in Luanping basin, norther Hebei, and its implications. Acta Petrol. Mineral. 22, 237–244 (2003).
no DOI — not checkedSwofford, D. L. PAUP*. Phylogenetic Analysis Using Parsimony (*and Other Methods) Version 4 (Sinauer Associates (2002).
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