Jingmai K. O'Connor
Chinese Academy of Sciences
50Publications
19H-index
1,060Citations
Publications 50
Newest
Jingmai K. O'Connor19
Estimated H-index: 19
(Chinese Academy of Sciences)
Abstract Although direct associations that reveal diet are extremely rare in the fossil record, the rich Lower Cretaceous Jehol Lagerstatte has produced dozens of specimens preserving ingested items, which together reveal important information regarding the early evolution of the avian alimentary canal. Direct evidence indicates Jeholornis and Sapeornis ate seeds and like living granivores utilized a gastric mill although only the more derived Sapeornis possessed a crop for food storage. Despite...
2 Citations Source Cite
Published on Feb 1, 2018in Chinese Science Bulletin
Lida Xing18
Estimated H-index: 18
(China University of Geosciences),
Jingmai K. O'Connor19
Estimated H-index: 19
(Chinese Academy of Sciences)
+ 7 AuthorsJun Fang1
Estimated H-index: 1
(China University of Geosciences)
Abstract Cretaceous amber from Myanmar (∼99 Ma Burmese amber) has become a valuable supplement to the traditional skeletal record of small theropod dinosaurs preserved in sedimentary rocks, particularly for coelurosaurs and enantiornithines. The specimens recovered from this deposit preserve skeletal material and soft tissues in unmatched detail. This provides opportunities to study three-dimensional preservation of soft tissues, microstructure, and pigmentation patterns that are seldom availabl...
3 Citations Source Cite
Published on Apr 1, 2018in Cretaceous Research 1.93
Jingmai K. O'Connor19
Estimated H-index: 19
(Chinese Academy of Sciences),
Xiaoli Wang17
Estimated H-index: 17
(Linyi University)
+ 5 AuthorsXiaomei Zhang8
Estimated H-index: 8
(American Museum of Natural History)
Abstract Seeds preserved in association with the holotype of Jeholornis prima provided the first direct evidence of granivory in any Mesozoic bird. Although this long boney-tailed bird also displays several morphological indicators correlated with herbivory such as reduced dentition and a deep mandible, Jeholornis has not been previously reported to possess a gastric mill. However, this feature is commonly linked to herbivory in theropod dinosaurs and present in at least one sympatric ornithurom...
6 Citations Source Cite
Published on Aug 16, 2018in bioRxiv
Jing-Shan Zhao (Tsinghua University), Yaser Saffar Talori (Tsinghua University)+ 1 AuthorsYaser Saffar Talori, Jing-Shan Zhao, Jingmai Kathleen O'Connor (Tsinghua University)
This study seeks to better quantify the parameters that drove the evolution of flight from non-volant winged dinosaurs to modern birds. In order to explore this issue, we used fossil data to model the feathered forelimb of Caudipteryx, the most basal non-volant maniraptoran dinosaur with elongate pennaceous feathers that could be described as forming proto-wings. In order to quantify the limiting flight factors, we created three hypothetical wing profiles for Caudipteryx representing incremental...
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Published on Sep 1, 2017in Gondwana Research 5.66
Lida Xing18
Estimated H-index: 18
(China University of Geosciences),
Jingmai K. O'Connor19
Estimated H-index: 19
(Chinese Academy of Sciences)
+ 4 AuthorsMing Bai14
Estimated H-index: 14
(Chinese Academy of Sciences)
Abstract Burmese amber has recently provided some detailed glimpses of plumage, soft tissues, and osteology of juvenile enantiornithine birds, but these insights have been restricted to isolated wing apices. Here we describe nearly half of a hatchling individual, based on osteological and soft tissue data obtained from the skull, neck, feet, and wing, and identified as a member of the extinct avian clade Enantiornithes. Preserved soft tissue provides the unique opportunity to observe the externa...
18 Citations Source Cite
Published on Nov 2, 2017in Journal of Systematic Palaeontology 2.33
Han Hu6
Estimated H-index: 6
(Chinese Academy of Sciences),
Jingmai K. O'Connor19
Estimated H-index: 19
(Chinese Academy of Sciences)
The Sihedang locality of the Lower Cretaceous Yixian Formation is the only recognized ornithuromorph-dominated locality in the Jehol Group of north-eastern China. Here we report on the first enantiornithine from this locality and erect a new taxon Monoenantiornis sihedangia gen. et sp. nov. The holotype and only specimen preserves a rare ontogenetic stage in which the intermedium is ossified but free from the other proximal tarsals and the tibia, consistent with the pattern of ossification that ...
6 Citations Source Cite
Published on Jan 1, 2017in Acta Palaeontologica Polonica 1.89
Jingmai K. O'Connor19
Estimated H-index: 19
,
Lucja Fostowicz-Frelik
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Published on Jun 1, 2017in Cretaceous Research 1.93
Yan Wang8
Estimated H-index: 8
(Linyi University),
Han Hu6
Estimated H-index: 6
(Chinese Academy of Sciences)
+ 5 AuthorsXiaoting Zheng14
Estimated H-index: 14
(Linyi University)
Abstract Here we describe the well-preserved skull of a juvenile specimen of Sapeornis, STM 16-18. Only the tail and hindlimb plumage of this specimen have been previously described. It preserves what we consider to be the complete dentition of Sapeornis with four premaxillary teeth, three maxillary teeth and two tiny dentary teeth on each side, the latter feature being previously unknown for this taxon. Based on a study of 71 specimens of Sapeornis preserving dentition, we infer the absence of ...
7 Citations Source Cite
Published on Dec 1, 2016in Nature Communications 12.35
Lida Xing18
Estimated H-index: 18
(China University of Geosciences),
Ryan C. McKellar5
Estimated H-index: 5
(University of Regina)
+ 10 AuthorsXing Xu39
Estimated H-index: 39
(Chinese Academy of Sciences)
Our knowledge of Cretaceous plumage is limited by the fossil record itself: compression fossils surrounding skeletons lack the finest morphological details and seldom preserve visible traces of colour, while discoveries in amber have been disassociated from their source animals. Here we report the osteology, plumage and pterylosis of two exceptionally preserved theropod wings from Burmese amber, with vestiges of soft tissues. The extremely small size and osteological development of the wings, co...
22 Citations Source Cite
Published on Mar 3, 2016in Journal of Vertebrate Paleontology 2.19
Yan Wang8
Estimated H-index: 8
(Chinese Academy of Sciences),
Min Wang11
Estimated H-index: 11
(Chinese Academy of Sciences)
+ 3 AuthorsXiaomei Zhang8
Estimated H-index: 8
ABSTRACTWe report a new enantiornithine bird, Linyiornis amoena gen. et sp. nov., from the Lower Cretaceous Jiufotang Formation in northeastern China. Traces of ovarian follicles indicate that the specimen represents a female individual. The nearly three-dimensional preservation of the new specimen reveals morphological details rarely visible in other Early Cretaceous enantiornithines, allowing more detailed comparison with Late Cretaceous enantiornithines. Differences in the preserved morpholog...
8 Citations Source Cite
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