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A mid-Cretaceous enantiornithine (Aves) hatchling preserved in Burmese amber with unusual plumage

Published on Sep 1, 2017in Gondwana Research6.48
· DOI :10.1016/j.gr.2017.06.001
Lida Xing18
Estimated H-index: 18
(China University of Geosciences),
Jingmai K. O'Connor22
Estimated H-index: 22
(CAS: Chinese Academy of Sciences)
+ 4 AuthorsMing Bai15
Estimated H-index: 15
(CAS: Chinese Academy of Sciences)
Abstract
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 external opening of the ear, the eyelid, and fine details of tarsal scutellation. The new amber specimen yields the most complete view of hatchling plumage and integument yet to be recovered from the Cretaceous, including details of pterylosis, feather microstructure, and pigmentation patterns. The hatchling was encapsulated during the earliest stages of its feather production, providing a point for comparisons to other forms of body fossils, as well as isolated feathers found in Cretaceous ambers. The plumage preserves an unusual combination of precocial and altricial features unlike any living hatchling bird, having functional remiges combined with sparse body feathers. Unusual feather morphotypes on the legs, feet, and tail suggest that first generation feathers in the Enantiornithes may have been much more like contour feathers than the natal down observed in many modern birds. However, these regions also preserve filamentous feathers that appear comparable to the protofeathers observed in more primitive theropods. Overall, the new specimen brings a new level of detail to our understanding of the anatomy of the juvenile stages of the most species-rich clade of pre-modern birds and contributes to mounting data that enantiornithine development drastically differed from that of Neornithes.
  • References (46)
  • Citations (19)
References46
Newest
#1Lida Xing (China University of Geosciences)H-Index: 18
#2Ryan C. McKellar (University of Regina)H-Index: 5
Last.Philip J. Currie (U of A: University of Alberta)H-Index: 50
view all 14 authors...
#1Lida Xing (China University of Geosciences)H-Index: 18
#2Ryan C. McKellar (University of Regina)H-Index: 5
Last.Xing Xu (CAS: Chinese Academy of Sciences)H-Index: 41
view all 13 authors...
#1Min Wang (CAS: Chinese Academy of Sciences)H-Index: 11
#2Han Hu (CAS: Chinese Academy of Sciences)H-Index: 2
Last.Zhiheng Li (University of Texas at Austin)H-Index: 8
view all 3 authors...
#1Juan D. Daza (SHSU: Sam Houston State University)H-Index: 14
#2Edward L. Stanley (Florida Museum of Natural History)H-Index: 9
Last.David A. Grimaldi (AMNH: American Museum of Natural History)H-Index: 40
view all 5 authors...
#1Shuo Wang (Kunming University of Science and Technology)H-Index: 1
#2Chao Shi (CAS: Chinese Academy of Sciences)H-Index: 7
Last.Li-Zhi Gao (Kunming University of Science and Technology)H-Index: 17
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#1Ismar de Souza Carvalho (UFRJ: Federal University of Rio de Janeiro)H-Index: 20
#2Fernando E. NovasH-Index: 29
Last.José A. AndradeH-Index: 3
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Cited By19
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#1Tian Jiang (CAS: Chinese Academy of Sciences)
#2Jacek Szwedo (CAS: Chinese Academy of Sciences)
Last.Bo Wang (CAS: Chinese Academy of Sciences)H-Index: 33
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#1Lida Xing (China University of Geosciences)H-Index: 18
#2Ryan C. McKellar (KU: University of Kansas)H-Index: 12
Last.Luis M. Chiappe (Natural History Museum of Los Angeles County)H-Index: 45
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#1Thomas G. Kaye (AmeriCorps VISTA)H-Index: 9
#2Michael Pittman (HKU: University of Hong Kong)H-Index: 9
Last.Angela D. Buscalioni (UAM: Autonomous University of Madrid)H-Index: 24
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#1Lida Xing (China University of Geosciences)H-Index: 18
#2Donghao Wang (China University of Geosciences)
Last.Susan E. Evans (UCL: University College London)H-Index: 38
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#1Lida Xing (China University of Geosciences)H-Index: 18
#2Jingmai K. O’Connor (CAS: Chinese Academy of Sciences)H-Index: 9
Last.Fuming Lei (CAS: Chinese Academy of Sciences)
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