The Origin and Diversification of Birds
- S. Brusatte, J. O’Connor, E. Jarvis
- Environmental ScienceCurrent Biology
- 5 October 2015
A bizarre Jurassic maniraptoran theropod with preserved evidence of membranous wings
- Xing（徐星） Xu, Xiaoting Zheng, Yanhong Pan
- BiologyNature
- 7 May 2015
Documentation of the unique forelimbs of Yi greatly increases the morphological disparity known to exist among dinosaurs, and highlights the extraordinary breadth and richness of the evolutionary experimentation that took place close to the origin of birds.
Pre‐modern Birds: Avian Divergences in the Mesozoic
- J. O’Connor, L. Chiappe, Alyssa Bell
- Biology
- 20 April 2011
A revision of enantiornithine (Aves: Ornithothoraces) skull morphology
- J. O’Connor, L. Chiappe
- Environmental Science, Geography
- 6 January 2011
A comprehensive overview of the current knowledge of enantiornithine skull anatomy is presented and a number of trophic specializations can be deduced from the range of preserved morphologies, further hinting at the morphological and ecological diversity of the Cretaceous Enantiornithes.
Anatomy of the Basal Ornithuromorph Bird Archaeorhynchus spathula from the Early Cretaceous of Liaoning, China
- Shuang Zhou, Zhonghe Zhou, J. O’Connor
- Environmental Science, Geography
- 1 January 2013
These new specimens are subadult: together with the holotype of Archaeorhynchus, they constitute the entire Early Cretaceous record of subadult ornithuromorphs and reveal important information regarding the ontogeny of this group.
The Completeness of the Fossil Record of Mesozoic Birds: Implications for Early Avian Evolution
- N. Brocklehurst, P. Upchurch, P. Mannion, J. O’Connor
- Environmental Science, GeographyPLoS ONE
- 25 June 2012
The quality of the fossil record of Mesozoic avian species is assessed using a recently proposed character completeness metric which calculates the percentage of phylogenetic characters that can be scored for each taxon, suggesting the abundance and diversity of birds might influence the probability of high quality specimens being preserved.
Phylogenetic Support for a Specialized Clade of Cretaceous Enantiornithine Birds with Information from a New Species
- J. O’Connor, Xuri Wang, Jinyuan Liu
- Biology
- 12 March 2009
Shanweiniao provides new information on the anatomy of longipterygids, and preserves a rectricial morphology previously unknown to enantiornithines, with at least four tail feathers closely arranged, which supports the hypothesis that enantiORNithines were strong fliers and adds to the diversity of known tail morphologies of these Cretaceous birds.
Preservation of ovarian follicles reveals early evolution of avian reproductive behaviour
- Xiaoting Zheng, J. O’Connor, Zhonghe Zhou
- Biology, Environmental ScienceNature
- 28 March 2013
The first discovery of fossilized mature or nearly mature ovarian follicles are reported, revealing a previously undocumented stage in dinosaur reproduction: reproductively active females near ovulation.
A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds
- J. O’Connor, Zhonghe Zhou
- Biology, Environmental Science
- 1 October 2013
Unique among ornithurines, Chaoyangia possesses two dorsal processes on the ischium, and thus remains a valid taxon and is included in a cladistic analysis to test morphological hypotheses regarding its systematic position.
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