Preservation of ovarian follicles reveals early evolution of avian reproductive behaviour

Xiaoting Zheng, Jingmai O’Connor (), Fritz Huchzermeyer, Xiaoli Wang, Yan Wang, Min Wang and Zhonghe Zhou ()
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Xiaoting Zheng: Institute of Geology and Paleontology, Linyi University, Linyi, Shandong 276000, China
Jingmai O’Connor: Key Laboratory of Vertebrate Evolution and Human Origin of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China
Fritz Huchzermeyer: Faculty of Veterinary Science, University of Pretoria, Private Bag X 04, Onderstepoort 0110, South Africa
Xiaoli Wang: Institute of Geology and Paleontology, Linyi University, Linyi, Shandong 276000, China
Yan Wang: Institute of Geology and Paleontology, Linyi University, Linyi, Shandong 276000, China
Min Wang: Key Laboratory of Vertebrate Evolution and Human Origin of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China
Zhonghe Zhou: Key Laboratory of Vertebrate Evolution and Human Origin of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China

Nature, 2013, vol. 495, issue 7442, 507-511

Abstract: Newly discovered fossils of primitive birds from China, preserved with ovarian follicles intact, show that birds only had one functioning ovary at any given time from a very early date, but that other features, such as skeletal and sexual maturity, remained very dinosaur-like.

Date: 2013
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DOI: 10.1038/nature11985

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