Unique caudal plumage of Jeholornis and complex tail evolution in early birds

OConnor J.; Wang X.; Sullivan C.Zheng X.Tubaro P.Zhang X.Zhou Z.

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Unique caudal plumage of Jeholornis and complex tail evolution in early birds

机译：Unique caudal plumage of Jeholornis and complex tail evolution in early birds

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The Early Cretaceous bird Jeholornis was previously only known to have a distally restricted ornamental frond of tail feathers. We describe a previously unrecognized fan-shaped tract of feathers situated dorsal to the proximal caudal vertebrae. The position and morphology of these feathers is reminiscent of the specialized upper tail coverts observed in males of some sexually dimorphic neornithines. As in the neornithine tail, the unique "two-tail" plumage in Jeholornis probably evolved as the result of complex interactions between natural and sexual selective pressures and served both aerodynamic and ornamental functions. We suggest that the proximal fan would have helped to streamline the body and reduce drag whereas the distal frond was primarily ornamental. Jeholornis reveals that tail evolution was complex and not a simple progression from frond to fan.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2013年第43期|17404-17408|共5页
作者
OConnor J.; Wang X.; Sullivan C.Zheng X.Tubaro P.Zhang X.Zhou Z.;
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作者单位

Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China;

Institute of Geology and Paleontology, Linyi University, Linyi City, Shandong 276005, China;

Division Ornitologia, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Consejo Nacional de Investigaciones Científicas y Técnicas, C1405DJR Buenos Aires, ArgentinaShandong Tianyu Museum of Nature, Pingyi, Shandong 273300, China;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
Aves; Jehol; Mesozoic;

Unique caudal plumage of Jeholornis and complex tail evolution in early birds

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