Reference health
A reappraisal of<i>Boluochia zhengi</i>(Aves: Enantiornithes) and a discussion of intraclade diversity in the Jehol avifauna, China
1 of 30 checkable references need attention · checked 2026-07-14
At the dated check, the references listed below either did not resolve in Crossref or DataCite, or carried a publisher retraction notice. Each one is shown with the registry record that put it there.
20 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.
References needing attention
does not resolve to a known work10.1650/0010-5422(2000)102[0409:TRCFPI]2.0.CO;2
The 29 checked references that resolve
resolves10.1671/0272-4634(2002)022[0170:NEBFTM]2.0.CO;2
New enantiornithine bird from the marine Upper Cretaceous of Alabama
resolves10.1017/S1477201906001969
A new Enantiornithine bird from the Late Cretaceous of the Gobi desert
resolves10.1098/rsbl.2008.0409
Life history of a basal bird: morphometrics of the Early Cretaceous
<i>Confuciusornis</i>
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>
resolves10.1029/2004GL019790
Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China, and its implications
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/s00114-003-0489-1
New Early Cretaceous fossil from China documents a novel trophic specialization for Mesozoic birds
resolves10.2307/4089456
Species Limits in Antbirds (Passeriformes: Thamnophilidae): The Myrmotherula surinamensis Complex
resolves10.1111/j.1755-6724.2006.tb00792.x
New Eoenantiornithid Bird from the Early Cretaceous Jiufotang Formation of Western Liaoning, China
resolves10.1671/039.029.0210
Anatomy of the Early Cretaceous bird <i>Rapaxavis pani</i>, a new species from Liaoning Province, China
resolves10.1080/02724634.2009.10010371
Phylogenetic support for a specialized clade of Cretaceous enantiornithine birds with information from a new species
resolves10.1126/science.255.5046.845
Early Evolution of Avian Flight and Perching: New Evidence from the Lower Cretaceous of China
resolves10.1002/jmor.10029
Bone microstructure and developmental plasticity in birds and other dinosaurs
resolves10.1111/j.1755-6724.2010.00156.x
New Species of Enantiornithes (Aves: Ornithothoraces) from the Qiaotou Formation in Northern Hebei, China
resolves10.1016/j.cretres.2006.05.011
New evidence for Cretaceous age of the feathered dinosaurs of Liaoning: zircon U-Pb SHRIMP dating of the Yixian Formation in Sihetun, northeast China
resolves10.1139/e04-055
Description of a new enantiornithine bird from the Early Cretaceous of Hebei, northern China
resolves10.1007/s11430-008-0050-3
A primitive confuciusornithid bird from China and its implications for early avian flight
resolves10.1111/j.1755-6724.2007.tb00995.x
A New Enantiornitine Bird with Four Long Rectrices from the Early Cretaceous of Northern Hebei, China
resolves10.1139/e03-011
Anatomy of the primitive bird <i>Sapeornis chaoyangensis </i>from the Early Cretaceous of Liaoning, China
resolves10.1007/s00114-003-0416-5
Jeholornis compared to Archaeopteryx, with a new understanding of the earliest avian evolution
resolves10.1139/e05-038
Anatomy of the Early Cretaceous bird <i>Eoenantiornis buhleri</i> (Aves: Enantiornithes) from China
resolves10.1002/gj.1045
Evolutionary radiation of the Jehol Biota: chronological and ecological perspectives
resolves10.1111/j.1469-7580.2008.00880.x
Insight into diversity, body size and morphological evolution from the largest Early Cretaceous enantiornithine bird
resolves10.1016/j.cretres.2006.06.003
Palaeomagnetic and 40Ar/39Ar dating constraints on the age of the Jehol Biota and the duration of deposition of the Sihetun fossil-bearing lake sediments, northeast China
The 20 references without a DOI — listed, not checked
no DOI — not checkedCIT0002
no DOI — not checkedMesozoic Birds: Above the Heads of Dinosaurs
no DOI — not checkedChiappe, L. M. 2007.Glorified Dinosaurs: the Origin and Early Evolution of Birds, 263Hoboken: John Wiley & Sons, Inc.
no DOI — not checkedNew Perspectives on the Origin and Early Evolution of Birds
no DOI — not checkedCIT0012
no DOI — not checkedL’Evolution des Oiseaux d’Apres le Temoignage des Fossiles
no DOI — not checkedO’Connor, J. K. 2009.A systematic review of Enantiornithes (Aves: Ornithothoraces), 600Los Angeles: University of Southern California. Unpublished doctoral thesis
no DOI — not checkedCIT0021
no DOI — not checkedCIT0022
no DOI — not checkedCIT0024
no DOI — not checkedMesozoic Birds: Above the Heads of Dinosaurs
no DOI — not checkedCIT0004a
no DOI — not checkedCIT0034
no DOI — not checkedThe Jehol Biota: the Emergence of Feathered Dinosaurs, Beaked Birds and Flowering Plant
no DOI — not checkedCIT0038
no DOI — not checkedCIT0040
no DOI — not checkedCIT0041
no DOI — not checkedMesozoic Birds: Above the Heads of Dinosaurs
no DOI — not checkedCIT0048
no DOI — not checkedCIT0050
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