Atterholt JA, O'Connor JK, You H-L. 2025. Osteohistology of enantiornithine birds from the Lower Cretaceous Xiagou Formation. Geobios 90: 5-16.

Bohus C, Pardo J, Mann A, O'Connor JK, Devera J. In press. New tetrapod material, faunal assemblage, and geology of the Late Mississippian-aged red bed deposits near Goreville, Illinois. The Geological Society Special Publications.

Castro-Terol J, Pérez-Ramos A, O'Connor JK, Sanz JL, Serrano FJ. 2025. Micro-CT reconstruction reveals new information about the phylogeny and locomotion of the Early Cretaceous bird Iberomesornis romerali. Geobios 90: 17-30.

O'Connor JK, Clark AD, Kuo P-C, Kiat Y, Fabbri M, Shinya A, Van Beek C, Lu J, Wang M, Han H. 2025. Chicago Archaeopteryx informs on the early evolution of the avian bauplan. Nature.

O'Connor JK. 2025. Insights into the early evolution of modern avian physiology from fossilized soft tissues from the Mesozoic. Philosophical Transactions of the Royal Society London B Biological Sciences 380: 20230426.

O'Connor JK, Atterholt JA, Bailleul AM, Wang M, Kuo P-C, Zhou Z-H. 2025. Description and osteohistology of two early immature enantiornithines (Aves: Ornithothoraces) from the Early Cretaceous Jehol Biota. Geobios 90: 103-122.

O'Connor JK, Atterholt JA, Clark AD, Zhou L-Q, Peng C, Zhang X-Q, You H-L. 2025. A new enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Xiagou Formation with unusually short pubes. Geobios 90: 123-131.

Arnold P, Janiszewska K, Li Q, O'Connor JK, Fostowicz-Frelik L. 2024. The Late Cretaceous eutherian Zalambdalestes reveals unique axis and complex evolution of the mammalian neck. Science Bulletin 69: 1767-1775.

Clark AD, Atterholt JA, Scanella JB, Carroll N, O'Connor JK. 2024. New enantiornithine diversity in the Hell Creek Formation and the functional morphology of the avisaurid tarsometatarsus. PLoS ONE 19(10): 1-25.

Kiat Y, O'Connor JK. Functional constraints on the number and shape of flight feathers. 2024. Proceedings of the National Academy of Sciences USA. 121(e2306639121): 1-11.

Liu Y-C, Ji Q, Wang X-R, O'Connor JK, Guo B, Ren T-L, Yin T-T, Wang Y-B. 2024. Micro-XRF mapping elucidates the taphonomy of two Early Cretaceous paravian fossils from western Liaoning, China. Atomic Spectroscopy 45(2): 123-131.

Loewen M, Sertich JJW, Sampson S, O'Connor JK, Carpenter S, Sisson B, Øhlenschlæger A, Farke AA, Makovicky PJ, Longrich N, Evans DC. In press. Lokiceratops rangiformis gen. et sp. nov. (Ceratopsidae: Centrosaurinae) from the Campanian Judith River Formation of Montana reveals rapid regional radiations and extreme endemism within centrosaurine dinosaurs. PeerJ 12:e17224 1-97.

O'Connor JK, Clark AD, Herrera F, Yang X, Wang X-L, Zheng X-T, Hu H, Zhou Z-H. 2024. Direct evidence of frugivory in the Mesozoic bird Longipteryx contradicts morphological proxies for diet. Current Biology 34, 4559-4566.

Shen C-Z, Clark AD, Fang H, Chen S-K, Jiang H-X, Ji Q, O'Connor JK. 2024. A new diminutive species of bohaiornithid enantiornithine (Aves: Ornithothoraces) from the Lower Cretaceous Jehol Group, northern China. Scientific Reports 14(1): 31363

Wang X-L, Clark AD, O'Connor JK, Zhang X-Y, Wang X, Zheng X-T, Zhou Z-H. 2024. First Edentulous Enantiornithine (Aves: Ornithothoraces) from the Early Cretaceous Jehol Avifauna. Cretaceous Research 159(105867): 1-14.

Wang X-L, O'Connor JK, Zheng X-T, Wang Y, Kiat Y. 2024. Earliest evidence of primary feather moult. Biology Letters 20(20240106): 1-6.

Wu Q, O'Connor JK, Wang S-Y, Zhou Z-H. 2024. Transformation of the pectoral girdle in pennaraptorans: critical steps in the formation of the modern avian shoulder joint. PeerJ 12: 1-42.

Clark AD, Hu H, Benson RBJ, O'Connor JK. 2023. Reconstructing the dietary habits and trophic positions of the Longipterygidae (Aves: Enantiornithes) using neontological and comparative morphological methods. PeerJ 11:1-32.

Kiat Y, O'Connor JK. 2023. Rarity of molt evidence in early pennaraptoran dinosaurs suggests annual molt evolved later among Neornithes. Communications Biology 6(687): 1-4.

Liu S-M, Li Z-H, Liu D, O'Connor JK. 2023. Quantifying the gastral mass in Early Cretaceous ornithuromorphs (Aves: Ornithothoraces) from the Jehol avifauna. Palaeontology, e12677: 1-17.

O'Connor JK, Kiat Y, Ma H-D, Ai T-Y, Wang L-H, Bi S-D. 2023. Immature feathers preserved in Burmite provide evidence of rapid molting in enantiornithines. Cretaceous Research, 149: 105572.

Stidham T, O'Connor JK, Li Z-H. 2023. The Pleistocene Zhoukoudian ‘Peking Man’ site records the first Beijing (China) evidence of the Northern Raven (Corvus corax). Journal of Ornithology, 165(1): 269-276.

Wang Y, Li Z-H, Wang C-C, Bailleul AM, Wang M, O'Connor JK, Li J-H, Zheng X-T, Pei R, Teng F-F, Wang X-L, Zhou Z-H. Comparative microstructural study on the teeth of Mesozoic birds and non-avian dinosaurs. Royal Society Open Science, 10(5): 230147.

Fabbri M, Navalón G, Benson RBJ, Pol D, O'Connor J, Bhullar B-A, Erickson GM, Norell MA, Orkney A, Lamanna MC, Zouhri S, Becker J, Emke A, Dal Sasso C, Bindellini G, Maganuco S, Auditore M, Ibrahim N. 2022. Subaqeuous foraging among carnivorous dinosaurs. Nature, 603:852-857.

Hendrickx C, Bell PR, Ezcurra M, Cuesta E, Milner AR, Xu X, O'Connor JK, Loewen M, Sereno PC, Mateus O. 2022. Morphology and distribution of epidermal structures (excluding feathers) in non-avian theropod dinosaurs. Biological Reviews (Cambridge), 97(3): 960-1004.

Hu H, Wang Y, McDonald PG, Wroe S, O'Connor JK, Bjarnason A, Bevitt JJ, Yin X-W, Zheng X-T, Zhou Z-H, Benson RBJ. 2022. Earliest evidence for fruit consumption and potential seed dispersal by birds. eLife, 11(74751): 1-19.

Hu H, Wang Y, Fabbri M, O'Connor JK, McDonald PG, Wroe S, Yin X-W, Zheng X-T, Zhou Z-H, Benson RBJ. 2022. Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes). Zoological Journal of the Linnean Society, 198(1): 93-112.

O'Connor JK, Stidham TA, Harris JD, Lamanna M, Bailleul AM, Hu H, Wang M, You H-L. 2022. Avian skulls represent a diverse ornithuromorph fauna from the Lower Cretaceous Xiagou Formation, Gansu Province, China. Journal of Systematics and Evolution, 60(5): 1172-1198.

Rothschild BM, O'Connor JK, Lozada MC. 2022. Closer examination does not support infection as cause for enigmatic Tyrannosaurus rex mandibular pathologies. Cretaceous Research, 140(105353): 1-11.

Wang M, Stidham TA, O'Connor JK, Zhou Z-H. 2022. Insight into the evolutionary assemblage of cranial kinesis from a Cretaceous bird. eLife 11:1-18.

Atterholt JA, Poust AW, Erickson GM, O'Connor JK. 2021. Intraskeletal osteohistovariability reveals complex growth strategies in a Late Cretaceous enantiornithine. Frontiers in Earth Science, 9:640220.

Clark AD, O'Connor JK. 2021. Exploring the ecomorphology of two Cretaceous enantiornithines with unique pedal morphology. Frontiers in Ecology and Evolution, 15:654156.

Kiat Y, Pyle P, Balaban A, O'Connor JK. 2021. Reinterpretation of purported molting evidence in the Thermopolis Archaeopteryx. Communications Biology, 4:837

Liu S-M, Li Z-H, Bailleul AM, Wang M, O'Connor JK. 2021. Investigating possible gastroliths in a referred specimen of Bohaiornis guoi (Aves: Enantiornithes). Frontiers in Earth Science, 9:635727.

Stidham TA, O'Connor JK. 2021. The evolutionary and functional implications of the unusual quadrate of Longipteryx chaoyangensis (Avialae: Enantiornithes) from the Cretaceous Jehol Biota of China. Journal of Anatomy, 239(5), 1066-1074.

Talori YS, Zhao J-S, O'Connor JK. 2021. Kinematics of wings from Caudipteryx to modern birds. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science.

Wang M, O'Connor JK, Zhao T, Pan Y-H, Zheng X-T, Wang X-L, Zhou Z-H. 2021. An Early Cretaceous enantiornithine bird with a pintail. Current Biology, 31(21), 4845-4852.

Wu Q, O'Connor JK, Li Z-H, Bailleul AM. 2021. Cartilage on the furculae of living birds and the extinct bird Confuciusornis: a preliminary analysis and implications for flight style inferences in Mesozoic birds. Vertebrata Palasiatica, 59(2): 110-124.

Wu Q, Bailleul AM, Li Z-H, O'Connor JK, Zhou Z-H. 2021. Osteohistology of the scapulocoracoid of Confuciusornis and preliminary analysis of the shoulder joint in Aves. Frontiers in Earth Science, 9: 617124.

Xu L, Buffetaut E, O'Connor JK, Zhang X-L, Jia S-H, Zhang J-M, Chang H-L, Tong H-Y. 2021. A new, remarkably preserved, enantiornithine bird from the Late Cretaceous of Henan (central China) and convergent evolution between enantiornithines and modern birds. Geological Magazine, 158(11), 2087-2094.

Bailleul AM, O'Connor JK, Li Z-H, Wu Q, Zhao T, Martinez Monleon MA, Wang M, Zheng X-T. 2020. Confirmation of ovarian follicles in an enantiornithine (Aves) from the Jehol Biota using soft tissue analyses. Communications Biology, 3: 1-8.

Ding A, Pittman M, Upchurch P, O'Connor JK, Field DJ, and Xu X. (2020). "The biogeography of coelurosaurian theropods and its impact on their evolutionary history", in: Pennaraptoran theropod dinosaurs: past progress and new frontiers. (eds.) M Pittman & X Xu). Bulletin of the American Museum of Natural History 40(440): 117-157.

Hu H, O'Connor JK, Wang M, McDonald PG, Wroe S, Zhou Z-H. 2020. New anatomical information of bohaiornithid Longusunguis confirms plesiomorphic diapsid skull retained in Enantiornithes. Journal of Systematic Palaeontology 18(18):1481-1495.

Hu H, O'Connor JK, McDonald PG, and Wroe S. 2020. Cranial osteology of the Early Cretaceous Sapeornis chaoyangensis (Aves: Pygostylia). Cretaceous Research 113(104496): 1-13.

Kiat Y, Balaban A, Sapir N, O'Connor JK, Wang M, Xu X. 2020. Sequential moult in a feathered dinosaur and implications for early paravian locomotion and ecology. Current Biology 30(18): 3633-3638

O'Connor JK, Falk AR, Wang M, Zheng X-T. 2020. First report of immature feathers in juvenile enantiornithines from the Early Cretaceous Jehol avifauna. Vertebrata Palasiatica, 58(1). 24-44.

O'Connor JK, Zheng X-T, Pan Y-H, Wang X-L, Wang Y, Zhang X-M, Zhou Z-H. 2020. New information on the plumage of Protopteryx (Aves: Enantiornithes) from a new specimen. Cretaceous Research, 116: 1-17.

Pittman M, O'Connor JK, Field DJ, Turner AH, Ma W-S, Makovicky PJ, Xu X. 2020. "Systematics, fossil record, and biogeography: pennaraptoran systematics," in Pennaraptoran theropod dinosaurs: past progress and new frontiers, eds. M Pittman & X Xu). Bulletin of the American Museum of Natural History 40(440): 39-95

Pittman M, O'Connor JK, Tse E, Makovicky PJ, Field DJ, Ma W-S, Turner AH, Norell MA, Pei R, Xu X. 2020. "The fossil record of Mesozoic and Paleocene pennaraptorans," in Pennaraptoran theropod dinosaurs: past progress and new frontiers, eds. M Pittman & X Xu). Bulletin of the American Museum of Natural History 40(440): 7-36

Wang M, O'Connor JK, Bailleul AM, Li Z-H. 2020. Evolution and distribution of medullary bone: evidence from a new Early Cretaceous enantiornithine bird. National Science Review, 7(6): 1068-1078.

Xing L-D, O'Connor JK, Schmitz L, Chiappe LM, McKellar RC, Yi Q-R, Li G. 2020. Hummingbird-sized dinosaur from the cretaceous period of Myanmar. Nature, 579, 245-249. (corresponding author) [Retracted but citable according to the ICZN]

Xing L-D, McKellar RC, O'Connor JK. 2020. An unusually large bird wing in mid-Cretaceous burmese amber. Cretaceous Research, 110(104412): 1-7.

Xing LD, Cockx P, O'Connor JK, McKellar RC. 2020. A newly discovered enantiornithine foot preserved in mid-Cretaceous Burmese amber. Palaeoentomology, 3(2), 212-219.

Xing L-D, O'Connor JK, Niu K-C, Cockx P, Mai H-J, McKellar RC. 2020. A new enantiornithine (Aves) preserved in mid-Cretaceous Burmese amber contributes to growing diversity of Cretaceous plumage patterns. Frontiers in Earth Science, 8: 1-11.

Yang S-H, He H-Y, Jin F, Zhang F-C, Wu Y-B, Yu Z-Q, Li Q-L, Wang M, O'Connor JK, Deng, C-L, Zhu R-X, Zhou Z-H. 2020. The appearance and duration of the Jehol Biota: Constraint from SIMS U-Pb zircon dating for the Huajiying Formation in northern China. Proceedings of the National Academy of Sciences U.S.A., 117: 14299-14305.

Zheng X-T, O'Connor JK, Wang Y, Wang X-L, Yin X-W, Zhang, X-M, Zhou Z-H. 2020. New information on the keratinous beak of Confuciusornis (Aves: Pygostylia) from two new specimens. Frontiers in Earth Science, 8 (367): 1-14.

Zheng X-T, Sullivan C, O'Connor JK, Wang X-L, Wang Y, Zhang X-M, Zhou Z-H. 2020. Structure and possible ventilatory function of unusual, expanded sternal ribs in the Early Cretaceous bird Jeholornis. Cretaceous Research, 116 (104597): 1-10.

Bailleul AM, Li Z-H, O'Connor JK, Zhou Z-H. 2019. Origin of the avian predentary and evidence of a unique form of cranial kinesis in Cretaceous ornithuromorphs. Proceedings of the National Academy of Sciences U.S.A., 116(49): 24696-24706.

Bailleul AM, O'Connor JK, Schweitzer MH. 2019. Dinosaur paleohistology: review, trends and new avenues of investigation. PeerJ 7: e7764.

Bailleul AM, O'Connor JK, Zhang S-K, Li Z-H, Wang Q, Lamanna M, Zhu X-F, Zhou Z-H. 2019. An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone. Nature Communications, 10(1275): 1-10.

Falk AR, O'Connor JK, Wang M, Zhou Z-H. 2019. On the preservation of the beak in Confuciusornis (Aves: Pygostylia). Diversity, 11(212): 1-8.

Hu H, Sansalone G, Wroe S, McDonald PG, O'Connor JK, Li Z-H, Xu X, Zhou Z-H. 2019. Evolution of the vomer and its implications for cranial kinesis in Paraves. Proceedings of the National Academy of Sciences U.S.A., 116(39): 19571-19578.

O'Connor JK, Zhou Z-H. 2019. The evolution of the modern avian digestive system – insights from paravian fossils from the Yanliao and Jehol biotas. Palaeontology, 63(1): 13-27.

O'Connor JK. 2019. The trophic habits of early birds. Palaeogeography, Palaeoclimatology, Palaeoecology 513, 178-195

O'Connor JK, Zheng X-T, Dong L-P, Wang X-L, Wang Y, Zhang X-M, Zhou Z-H. 2019. Microraptor with ingested lizard suggests non-specialized digestive function. Current Biology, 29: 1-7.

Pan YH, Zheng W-X, Sawyer RH, Penninngton M, Zheng X-T, Wang X-L, Wang M, Hu L, O'Connor JK, Zhao T, Li Z-H, Schroeter E, Wu F-X, Xu X, Zhou Z-H, Schweitzer MH. 2019. The molecular evolution of feathers with direct evidence from fossils. Proceedings of the National Academy of Sciences U.S.A., 116(8): 3018-3023.

Talori YS, Zhao J-S, Liu Y-F, Lu W-X, Li Z-H, O'Connor JK. 2019. Identification of avian flapping motion from non-volant winged dinosaurs based on modal effective mass analysis. PLoS Computational Biology, 15(5): e1006846.

Wang M, O'Connor JK, Zhou S, Zhou Z-H. 2019. New toothed Early Cretaceous ornithuromorph bird reveals intraclade diversity in pattern of tooth loss. Journal of Systematic Palaeontology, 18(8): 631-645.

Wang M, O'Connor JK, Zhou Z-H. 2019. A taxonomical revision of the Confuciusornithiformes (Aves: Pygostylia). Vertebrata Palasiatica, 57(1), 1-37

Wang M, O'Connor JK, Xu X, Zhou Z-H. 2019. A new Jurassic scansoriopterygid and the loss of membranous wings in theropod dinosaurs. Nature, 569(7755): 256-259.

Xing L-D, McKellar RC, O'Connor JK, Bai M, Tseng K-W, Chiappe LM. 2019. A fully feathered enantiornithine foot and wing fragment preserved in mid-Cretaceous Burmese amber. Scientific Reports, 9(927): 1-9

Xing L-D, O'Connor JK, Chiappe LM, McKellar RC, Carroll N, Hu H, Bai M, Lei F-M. 2019. A new enantiornithine with unusual pedal proportions found in amber. Current Biology, 29(14): 2396-2401 (co-first author)

Xing L-D, McKellar RC, O'Connor JK, Niu K-C, Mai H-J. 2019. A mid-cretaceous enantiornithine foot and tail feather preserved in Burmese amber. Scientific Reports, 9:15513.

Atterholt JA, Hutchison JH, O'Connor JK. 2018. The most complete enantiornithine from North America and a phylogenetic analysis of the Avisauridae. PeerJ 6, e5910.

O'Connor JK, Erickson GM, Norell MA, Bailleul AM, Hu H, Zhou Z-H. 2018. Medullary bone in an Early Cretaceous enantiornithine (Aves) and discussion regarding its identification in fossils. Nature Communications 9, 5169

O'Connor JK, Wang X-L, Sullivan C, Wang Y, Zheng X-T, Hu H, Zhang X-M, Zhou Z-H. 2018. First report of gastroliths in the Early Cretaceous basal bird Jeholornis. Cretaceous Research 84, 200-208

Rashid DJ, Surya K, Chiappe LM, Carroll N, Garrett KL, Varghese B, Bailleul AM, O'Connor JK, Chapman SC, Horner JR. 2018. Avian tail ontogeny, pygostyle formation, and interpretation of juvenile Mesozoic specimens. Scientific Reports 8, 9014.

Smith-Paredes D, Núñez-León D, Soto-Acuña S, O'Connor JK, Botelho JF, Vargas AO. 2018. Dinosaur ossification centres in embryonic birds uncover developmental evolution of the skull. Nature Evolution & Ecology 2, 1966-1973

Talori YS, Liu Y-F, Zhao J-S, Sullivan C, O'Connor JK, Li Z-H. 2018. Winged forelimbs of the small theropod dinosaur Caudipteryx could have generated small aerodynamic forces during rapid terrestrial locomotion. Scientific Reports 8:17854

Wang X-L, O'Connor JK, Maina JN, Pan Y-H, Wang M, Wang Y, Zheng X-T, Zhou Z-H. 2018. Archaeorhynchus preserving significant soft tissue including probable fossilized lungs. Proceedings of the National Academy of Sciences U.S.A. 115(45): 11555-11560.

Xing L-D, Cockx O, McKellar RC, O'Connor JK. 2018. Ornamental feathers in Cretaceous Burmese amber: resolving the enigma of rachis-dominated feather structure. Journal of Palaeogeography 7(13):1-18

Xing L-D, O'Connor JK, McKellar RC, Chiappe LM, Bai M, Tseng K-W, Zhang J, Yang H-D, Fang J, Li G. 2018. A flattened enantiornithine in mid-Cretaceous Burmese amber: Morphology and preservation. Science Bulletin 63(4), 235-243.

Zheng X-T, O'Connor JK, Wang X-L, Wang Y, Zhou Z-H. 2018. Reinterpretation of a previously described Jehol bird clarifies early trophic evolution in the Ornithuromorpha. Proceedings of the Royal Society B: Biological Sciences 285, 20172494.

Hu H, O'Connor JK. 2017. First species of Enantiornithes from Sihedang elucidates skeletal development in Early Cretaceous enantiornithines. Journal of Systematic Palaeontology 15(11): 909-926.

O'Connor JK, Zheng X-T, Hu H, Wang X-L, Zhou Z-H. 2017. The morphology of Chiappeavis magnapremaxillo (Pengornithidae: Enantiornithes) and a comparison of aerodynamic function in Early Cretaceous avian tail fans. Vertebrata Palasiatica 55, 1-18.

Sullivan C, Xu X, O'Connor JK. 2017. Complexities and novelties in the early evolution of avian flight, as seen in the Mesozoic Yanliao and Jehol Biotas of northeast China. Palaeoworld 26(2): 212-229.

Wang Y, Hu H, O'Connor JK, Wang M, Xu X, Zhou Z-H, Wang X-L, Zheng X-T. 2017 A previously undescribed specimen reveals new information on the dentition of Sapeornis chaoyangensis. Cretaceous Research 74, 1-10.

Wang M, O'Connor JK, Pan Y-H, Zhou Z-H. 2017. A bizarre Early Cretaceous enantiornithine bird with unique crural feathers and an ornithuromorph plough-shaped pygostyle. Nature Communications, 8(14141): 1-12.

Wang W, O'Connor JK. 2017 Morphological coevolution of the pygostyle and tail feathers in Early Cretaceous birds. Vertebrata Palasiatica 55(4): 289-314.

Xing L-D, O'Connor JK, McKellar RC, Chiappe LM, Tseng K-W, Li G, Bai M. 2017 A mid-Cretaceous enantiornithine (Aves) hatchling preserved in Burmese amber with unusual plumage. Gondwana Research 49: 264-277.

Zheng X-T, O'Connor JK, Pan Y-H, Wang X-L, Wang Y, Wang M & Zhou Z-H. 2017. Exceptional preservation of soft tissue in a new specimen of Eoconfuciusornis and its biological implications. National Science Review 4(3): 441-452.

Botelho JB, Smith-Paredes D,  Soto-Acuña S, O'Connor JK, Palma V, Vargas A. 2016. Molecular development of fibular reduction in birds and its evolution from dinosaurs. Evolution DOI: 10.1111/evo.12882.

O'Connor JK, Li D-Q, Lamanna M, Wang M, Harris JD, Atterholt J, You H-L. 2016. A new Early Cretaceous enantiornithine (Aves: Ornithothoraces) from northwestern China with elaborate tail ornamentation. Journal of Vertebrate Paleontology, 36(1): e1054035.

O'Connor JK, Wang X-L, Zheng X-T, Hu H, Zhang X-M, Zhou Z-H. 2016. An enantiornithine with a fan-shaped tail, and the evolution of the rectricial complex in early birds. Current Biology, 26(1): 114-119.

O'Connor JK, Wang M, Hu H. 2016. A new ornithuromorph (Aves) with an elongate rostrum from the Jehol Biota and the early evolution of rostralization in birds. Journal of Systematic Palaeontology 14(11): 939-948.

Pan Y-H, Zheng W-X, Moyer A, O'Connor JK, Wang M, Zheng X-T, Wang X-L, Schroeter E, Zhou Z-H, Schweitzer MH. 2016. Molecular evidence of keratin and melanosomes in feathers of the Early Cretaceous bird Eoconfuciusornis. Proceedings of the National Academy of Sciences U.S.A. 113(49): E7900-E7907.

Wang Y, Wang M, O'Connor JK, Zhou Z-H, Wang X-L, Zheng X-T, Zhang X-M. 2016. A new three dimensionally preserved Jehol enantiornithine bird with ovarian follicles. Journal of Vertebrate Paleontology 36(2): e1054496.

Xing L, McKellar RC, Wang M, Bai M, O'Connor JK, Benton MJ, Zhang J, Wang Y, Tseng K, Lockley MG, Li G. 2016. Mummified precocial bird wings in mid-Cretaceous Burmese amber. Nature Communications 7, 12089.

Brusatte SL, O'Connor JK, Jarvis ED. 2015. The origin and diversification of birds. Current Biology 25: R888–R898.

Hu H, O'Connor JK & Zhou Z-H. 2015. A new species of Pengornithidae (Aves: Enantiornithes) from the Lower Cretaceous of China suggests a specialized scansorial habitat previously unknown in early birds. PLoS ONE 10: e0126791.

O'Connor JK, Zheng X-T, Sullivan C, Chuong C-M, Wang X-L, Li A, Wang Y, Zhang X-M & Zhou Z-H. 2015. Evolution and functional significance of derived sternal ossification patterns in ornithothoracine birds. Journal of Evolutionary Biology 28: 1550-1567.

O'Connor JK, Zheng X-T, Wang XL, Zhang X-M & Zhou Z-H. 2015. The gastral basket in basal birds and their close relatives: size and possible function. Vertebrata Palasiatica 53: 133-152.

O'Connor JK & Zhou Z-H 2015. Early evolution of the biological bird: perspectives from new fossil discoveries in China. Journal of Ornithology: 1-10; 10.1007/s10336-015-1222-5.

O'Connor JK & Chang H-L. 2015. Hindlimb feathers in paravians: primarily ‘wings’ or ornaments? Biology Bulletin 42: 1-6.

O'Connor JK, Wang M, Zhou S & Zhou Z-H. 2015. Osteohistology of the Lower Cretaceous Yixian Formation ornithuromorph (Aves) Iteravis huchzermeyeri. Palaeontologica Electronica 18.2: 1-11.

Wang M, Zheng X-T, O'Connor JK, Lloyd GT, Wang X-L, et al. 2015. The oldest record of Ornithuromorpha reveals heterogeneous rates of morphological evolution among Early Cretaceous birds. Nature Communications 6: 6987.

Wang Y-M, O'Connor JK, Li D-Q, You H-L. 2015. New information on the postcranial skeleton of the Early Cretaceous Gansus yumenensis (Aves: Ornithuromorpha). Historical Biology DOI:10.1080/08912963.2015.1006217

Wang M, Li D-Q, O'Connor JK, Zhou Z-H, You H-L. 2015. Second species of enantiornithine bird from the Lower Cretaceous Changma Basin, northwestern China with implications for the taxonomic diversity of the Changma avifauna. Cretaceous Research 55:56-65.

Xu X, Zheng X-T, Sullivan C, Zhang F-C, O'Connor JK, et al. 2015. A bizarre Jurassic maniraptoran theropod with preserved evidence of membranous wings. Nature 521: 70-73.

Chiappe LM, Zhao B, O'Connor JK, Gao C-L, Habib M, Marugan-Lobon J, Meng Q-J, Cheng X-D. 2014. A new specimen of the early cretaceous bird Hongshanornis longicresta: Insights into the aerodynamics and diet of a basal ornithuromorph. PeerJ 2:e234; DOI 10.7717/peerj.234

Hu H, Zhou Z-H, O'Connor JK. 2014. A subadult specimen of Pengornis and character evolution in Enantiornithes. Vertebrata Palasiatica 52(1):77-97.

O'Connor JK, Sullivan C. 2014. Reinterpretation of the Early Cretaceous maniraptoran (Dinosauria: Theropoda) Zhongornis haoae as a scansoriopterygid-like non-avian, and the morphological resemblances between scansoriopterygids and basal oviraptorosaurs. Vertebrata Palasiatica 52(1):3-30.

O'Connor JK, Wang M, Zheng X-T, Wang X-L, Zhou Z-H. 2014. The histology of two female Early Cretaceous birds. Vertebrata Palasiatica 52(1):112-128.

O'Connor JK, Wang M, Zheng X-T, Zhou Z-H. 2014. Reply to Foth: [preserved cartilage is rare but not absent - troodontid sternal plates are absent not rare. Proceedings of the National Academy of Sciences, U.S.A., 111(50): E5335-E5335.

O'Connor JK, Chang H-L. Hindlimb feathers in paravians: primarily ‘wings’ or ornaments? 2014. Zoological Journal 93(10):1166-1172 [in Russian]

O'Connor JK, Averianov A, Zelenkov NV. 2014. A confuciusornithiform (Aves: Pygostylia) -like tarsometatarsus from the Early Cretaceous of Siberia and a discussion of the evolution of avian hindlimb musculature. Journal of Vertebrate Paleontology 34(3): 647-56.

Wang M, O'Connor JK, Zelenkov NV. 2014. A new diverse enantiornithine family (Bohaiornithidae fam. Nov.) From the lower cretaceous of china with information from two new species. Vertebrata Palasiatica 52(1):31-76.

Wang X-L, O'Connor JK, Zheng X-T, Wang M, Hu H, Zhou Z-H. 2014. New information on the evolution of rachis dominated tail feathers from a new basal enantiornithine. Biological Journal of the Linnean Society 113:805-819. (corresponding author)

Wang M, O'Connor JK, Zhou Z-H. 2014. A new robust enantiornithine bird from the Lower Cretaceous of China with scansorial adaptations. Journal of Vertebrate Paleontology 34(3): 657-671.

Zhang Y-G, O'Connor JK, Liu D, Meng Q-J, Sigurdsen T, Chiappe LM. 2014. New information on the anatomy of the Chinese Early Cretaceous Bohaiornithidae (Aves: Enantiornithes) from a subadult specimen of Zhouornis hani. PeerJ: e407; DOI 10.7717/peerj.407.

Zhang S-K, Jin X-S, O'Connor JK, Wang M, Xie J-F. 2014. A new egg with avian egg shape from the Upper Cretaceous of Zhejiang Province, China. Historical Biology DOI: 10.1080/08912963.2014.902451. (corresponding author)

Zheng X-T, O'Connor JK, Wang X-L, Wang M, Zhang X-M, Zhou Z-H. 2014. On the absence of sternal elements in Anchiornis (Paraves: Troodontidae) and Sapeornis (Aves: Pygostylia) and the complex early evolution of the avian sternum. Proceedings of the National Academy of Sciences 111(38):13900-13905. (corresponding author)

Zheng X-T, O'Connor JK, Wang X-L, Zhou Z-H, Zhang X-M. 2014. New information on Hongshanornithidae (Aves: Ornithuromorpha) from a new subadult specimen. Vertebrata Palasiatica 52(2):217-232.

Zheng X-T, O'Connor JK, Huchzermeyer F, Wang X-L, Wang Y, Zhang X-M, Zhou Z-H. 2014. New specimens of Yanornis indicate a piscivorous diet and modern alimentary canal. PlosOne 9(4): e95036. doi:10.1371/journal.pone.0095036. (corresponding author)

Zhou S, O'Connor JK, Wang M. A new species from an ornithuromorph (Aves: Ornithothoraces) dominated locality of the Jehol Biota. 2014. Chinese Science Bulletin 59(36): 5366-5378. (corresponding author)

O'Connor JK, Zhou Z-H. 2013. A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds. Journal of Systematic Palaeontology 11(7):889-906.

O'Connor JK, Zelenkov NV. 2013. The phylogenetic position of Ambiortus: comparison with Early Cretaceous birds from Asia. Paleontological Journal RAS 47(11):1270–1281.

O'Connor JK, Wang X-L, Sullivan C, Zheng X-T, Tubaro P, Zhang X-M, Zhou Z-H. 2013. The unique caudal plumage of Jeholornis and complex tail evolution in early birds. Proceedings of the National Academy of Sciences 43(110): 17404-17408.

O'Connor JK, Zheng X-T, Wang X-L, Wang Y, Zhou Z-H. 2013. Ovarian follicles shed new light on dinosaur reproduction during the transition towards birds. National Science Review 1(1): 15-17.

O'Connor JK, Zhang Y-G, Chiappe LM, Meng Q-J, Li Q-G, Liu D. 2013. A new enantiornithine from the Yixian Formation with the first recognized avian enamel specialization. Journal of Vertebrate Paleontology 33(1):1-12. [featured article]

O'Connor JK, Zhou Z-H, Zheng X-T. Zheng et al. reply. 2013. Nature.

Wang Y-M, O'Connor JK, Li D-Q, You H-L. 2013. Previously unrecognized ornithuromorph bird diversity in the Early Cretaceous Changma Basin, Gansu Province, Northwestern China. PLoS ONE 8(10): e77693. doi:10.1371/journal.pone.0077693.

Wang M, O'Connor JK, Zhou Z-H. 2013. The first fossil crow (Corvus sp. indet.) from the Early Pleistocene Nihewan Paleolithic sites in North China. Journal of Archaeological Science 40(3): 1623-1628.

Zheng X-T, O'Connor JK, Huchzermeyer FH, Wang X-L, Wang Y, Wang M, Zhou Z-H. Exceptional preservation of ovarian follicles in Early Cretaceous birds and implications for early evolution of avian reproductive behaviour. 2013. Nature 495: 507-511. (corresponding author)

Zhou S, Zhou Z-H, O'Connor JK. 2013. Anatomy of Archaeorhynchus spathula from the Early Cretaceous. Journal of Vertebrate Paleontology 33(1): 141-152.

Zhou S, Zhou Z-H, O'Connor JK. 2013. A new piscivorous ornithuromorph from the Jehol Biota. Historical Biology DOI: 10.1080/08912963.2013.819504.

Brocklehurst N, Upchurch P, Mannion PD, O'Connor JK. 2012. The Completeness of the Fossil Record of Mesozoic birds: Implications for Early Avian Evolution. PLoS ONE 7(6): e39056

O'Connor JK. 2012. A revised look at Liaoningornis longidigitrus (Aves). Vertebrata Palasiatica 50(1): 25-37.

O'Connor JK, Sun C-K, Xu X, Wang X-L, Zhou Z-H. 2012. A new species of Jeholornis with complete caudal integument. Historical Biology 4(1): 29-41.

O'Connor JK, Chiappe LM, Chuong C-M, Bottjer DJ, You H-L. 2012. Homology and potential cellular and molecular mechanisms for the development of unique feather morphologies in early birds. Geosciences 2: 157-177.

Zheng Z-T, Wang X-L, O'Connor JK, Zhou Z-H. 2012. Insight into the early evolution of the avian sternum from juvenile enantiornithines (Aves: Ornithothoraces). Nature Communications 3:1116, DoI: 10.1038/ncomms2104. (corresponding author)

Zhou S, Zhou Z-H, O'Connor JK. 2012. A new basal beaked ornithurine bird from the Lower Cretaceous of western Liaoning, China. Vertebrata Palasiatica 50(1): 9-24.

Ji S-A, Atterholt J, O'Connor JK, Lamanna MC, Harris JD, Li D-Q, You H-L, Dodson P. 2011. A new, three-dimensionally preserved enantiornithine (Aves: Ornithothoraces) from Gansu Province, China. Zoological Journal of the Linnean Society 162: 201-219.

O'Connor JK, Chiappe LM. 2011. A revision of enantiornithine (Aves: Ornithothoraces) skull morphology. Journal of Systematic Palaeontology 9(1): 135-147.

O'Connor JK, Zhou Z-H, Xu X. 2011. Additional specimen of Microraptor provides first evidence of dinosaurs preying on birds. Proceedings of the National Academy of Sciences 108(49):19662–19665. http://blogs.nature.com/news/2011/11/fossil_flying_dino_enjoyed_tas.html

O'Connor JK, Chiappe LM, Gao C-L, Zhao B. 2011. Anatomy of the Early Cretaceous bird Rapaxavis pani (Aves: Enantiornithes). Acta Palaeontologica Polonica 56(3): 463–475.

O'Connor JK, Zhou Z-H, Zhang F-C. 2011. A reappraisal of Boluochia zhengi (Aves: Enantiornithes) and a discussion of intraclade diversity in the Jehol avifauna, China. Journal of Systematic Palaeontology 9(1): 51-63.

O'Connor JK, Chiappe LM, Gao K-Q. 2010. A new species of ornithuromorph (Aves: Ornithothoraces) bird from the Jehol Group indicative of higher-level diversity. Journal of Vertebrate Paleontology 30(2): 311-321 [featured article]

O'Connor JK, Dyke GD. 2010. Synonyms and the taxonomy of Mesozoic birds: the case of Sinornis and Cathayornis (Aves: Enantiornithes). Proceedings from the 7th meetingof the Society of Avian Palaeontology and Evolution. 62(1): 7-20.

Wang X-R, O'Connor JK, Zhao B, Chiappe LM, Gao C-H, Cheng X-D. 2010. A new species of Enantiornithes (Aves: Ornithothoraces) based on a well-preserved specimen from the Yixian Formation of northwestern China. Acta Geologica Sinica 84(2): 247-256. (corresponding author)

You H-L, Atterholt J, O'Connor JK, Lamanna MC, Harris JD, Li D-Q. 2010. A second ornithuromorph from the Changma Basin, Gansu Province, northwestern China. Acta Palaeontologica Polonica 55(4): 617 - 625.

Close RA, Vickers-Rich P, Chiappe LM, O'Connor JK, Rich TH, Kool L. 2009. Earliest Gondwanan bird from the Cretaceous of southeastern Australia. Journal of Vertebrate Paleontology 29(2):616–619.

O'Connor JK, Wang X-R, Chiappe LM, Gao C-H, Meng Q-J, Cheng X-D, Liu J-Y. 2009. Phylogenetic support for a specialized clade of Cretaceous enantiornithine birds with information from a new species. Journal of Vertebrate Paleontology 29(1):188-204.

Tseng Z-J, O'Connor JK, Wang X-M, and Prothero D. 2009. The first Old World occurrence of the North American mustelid Sthenictis (Carnivora, Mammalia). Geodiversitas 31(4): 743 - 751.

Gao C-L, Chiappe LM, Meng Q-J, O'Connor JK, Wang X-R, Cheng X, Liu J. 2008. A new basal lineage of Early Cretaceous birds from China and its implications on the evolution of the avian tail. Palaeontology 51:775-791.

O'Connor JK, Prothero D, Wang X-M, Li Q, Qiu Z-D. 2008. Magnetic stratigraphy of the Lower Pliocene Gaotege beds, Inner Mongolia. New Mexico Museum of Natural History and Science Bulletin 44:431-436.

You H-L, Lamanna MC, Harris JD, Chiappe LM, O'Connor JK, Ji S-A, Lü J-C, Yuan C-X, Li D-Q, Zhang X, Lacovara KJ, Dodson P, Ji Q. 2006. A nearly modern amphibious bird from the Early Cretaceous of northwestern China. Science 312:1640-1643.

Zhang Z-H, Hou L-H, Hasegawa Y, O'Connor JK, Martin LD, Chiappe LM. 2006. The first Mesozoic heterodactyl bird from China. Acta Geologica Sinica (English Edition)

You H-L, O'Connor JK, Chiappe LM, Ji Q. 2005. A new fossil bird from the Early Cretaceous of Gansu Province, northwestern China. Historical Biology 17:7-14.