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检索条件"主题词=Actinopterygii"
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A Middle Triassic stem-neopterygian fish from China shows remarkable secondary sexual characteristics
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Science Bulletin 2016年 第4期61卷 338-344页
作者: Guang-Hui Xu Li-Jun Zhao Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China Zhejiang Museum of Natural History Hangzhou 310014 China
Secondary sexual characteristics are features that appear at sexual maturity and distinguish the two sexes of a species. They are readily observed and studied in living animals, but the phenomenon is rather more diffi... 详细信息
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