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Jingmai K. O’Connor
Chinese Academy of Sciences
91Publications
26H-index
1,728Citations
Publications 98
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#1Jingmai K. O’Connor (CAS: Chinese Academy of Sciences)H-Index: 26
#2ZHOUZhonghe (CAS: Chinese Academy of Sciences)H-Index: 47
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#1Min Wang (CAS: Chinese Academy of Sciences)H-Index: 24
#2Jingmai K. O’Connor (CAS: Chinese Academy of Sciences)H-Index: 26
Last.Zhiheng Li (CAS: Chinese Academy of Sciences)H-Index: 8
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#1Alida M. Bailleul (CAS: Chinese Academy of Sciences)H-Index: 8
#2Zhiheng Li (CAS: Chinese Academy of Sciences)H-Index: 8
Last.ZHOUZhonghe (CAS: Chinese Academy of Sciences)H-Index: 47
view all 4 authors...
The avian predentary is a small skeletal structure located rostral to the paired dentaries found only in Mesozoic ornithuromorphs. The evolution and function of this enigmatic element is unknown. Skeletal tissues forming the predentary and the lower jaws in the basal ornithuromorph Yanornis martini are identified using computed-tomography, scanning electron microscopy, and histology. On the basis of these data, we propose hypotheses for the development, structure, and function of this element. T...
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#1Lida Xing (China University of Geosciences)H-Index: 19
#2Ryan C. McKellar (KU: University of Kansas)H-Index: 13
Last.Huijuan Mai (Yunnan University)
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Since the first skeletal remains of avians preserved in amber were described in 2016, new avian remains trapped in Cretaceous-age Burmese amber continue to be uncovered, revealing a diversity of skeletal and feather morphologies observed nowhere else in the Mesozoic fossil record. Here we describe a foot with digital proportions unlike any previously described enantiornithine or Mesozoic bird. No bones are preserved in the new specimen but the outline of the foot is recorded in a detailed skin s...
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#1Lida Xing (China University of Geosciences)H-Index: 19
#2Ryan C. McKellar (KU: University of Kansas)H-Index: 13
Last.Luis M. Chiappe (Natural History Museum of Los Angeles County)H-Index: 47
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Over the last three years, Burmese amber (~99 Ma, from Myanmar) has provided a series of immature enantiornithine skeletal remains preserved in varying developmental stages and degrees of completeness. These specimens have improved our knowledge based on compression fossils in Cretaceous sedimentary rocks, adding details of three-dimensional structure and soft tissues that are rarely preserved elsewhere. Here we describe a remarkably well-preserved foot, accompanied by part of the wing plumage. ...
3 CitationsSource
#1Min WangH-Index: 24
Last.ZHOUZhongheH-Index: 47
view all 4 authors...
The earliest record of the Ornithuromorpha, which includes crown birds, is currently known from the Early Cretaceous Jehol Biota in north-eastern China. Here we describe a new ornithuromorph bird, ...
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Last.ZHOUZhongheH-Index: 47
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The Confuciusornithiformes represent the most stem-ward avian occurrence of an edentulous rostrum. Although a keratinous beak is widely considered to have covered the rostrum in confuciusornithiforms, this feature is almost never preserved, having been previously reported only in the holotype of Confuciusornis dui and the holotype of Eoconfuciusornis zhengi. This strongly contrasts with the widespread preservation of the keratinous sheaths that cover the manual and pedal ungual phalanges. Here, ...
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#1Alida M. Bailleul (CAS: Chinese Academy of Sciences)H-Index: 8
#2Jingmai K. O’Connor (CAS: Chinese Academy of Sciences)H-Index: 26
Last.Mary H. SchweitzerH-Index: 25
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In the mid-19th century, the discovery that bone microstructure in fossils could be preserved with fidelity provided a new avenue for understanding the evolution, function, and physiology of long extinct organisms. This resulted in the establishment of paleohistology as a subdiscipline of vertebrate paleontology, which has contributed greatly to our current understanding of dinosaurs as living organisms. Dinosaurs are part of a larger group of reptiles, the Archosauria, of which there are only t...
1 CitationsSource
#1Han Hu (UNE: University of New England (United States))H-Index: 1
#2Gabriele Sansalone (UNE: University of New England (United States))H-Index: 6
Last.ZHOUZhonghe (CAS: Chinese Academy of Sciences)H-Index: 47
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Most living birds exhibit cranial kinesis—movement between the rostrum and braincase—in which force is transferred through the palatal and jugal bars. The palate alone distinguishes the Paleognathae from the Neognathae, with cranial kinesis more developed in neognaths. Most previous palatal studies were based on 2D data and rarely incorporated data from stem birds despite great interest in their kinetic abilities. Here we reconstruct the vomer of the Early Cretaceous stem bird Sapeornis and the ...
1 CitationsSource
#1Jingmai K. O’Connor (CAS: Chinese Academy of Sciences)H-Index: 26
#2Xiaoting Zheng (LYU: Linyi University)H-Index: 15
Last.ZHOUZhonghe (CAS: Chinese Academy of Sciences)H-Index: 47
view all 7 authors...
Summary Direct indicators of diet and predator-prey relationships are exceedingly rare in the fossil record [ 1 , 2 ]. However, it is through such traces that we can best understand trophic interactions in ancient ecosystems [ 3 ], confirm dietary inferences derived from skeletal morphologies [ 4 ], and clarify behavioral and ecological interpretations [ 5 ]. Here, we identify a previously unrecognized lizard species in the abdomen of a specimen of Microraptor zhaoianus , a small, volant dromaeo...
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