A Middle Triassic stem-neopterygian fish from China shows remarkable secondary sexual characteristics
文献类型：期刊论文
| 作者 | Xu, Guang-Hui1; Zhao, Li-Jun2 |
| 刊名 | SCIENCE BULLETIN
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 61期号:4页码:338-344 |
| 关键词 | Sexual Dimorphism Breeding Tubercles Venusichthyidae Neopterygii Actinopterygii |
| DOI | 10.1007/s11434-016-1007-0 |
| 文献子类 | Article |
| 英文摘要 | 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 difficult to identify in fossil taxa. Here we report a new sexually dimorphic stem-neopterygian fish, Venusichthys comptus gen. et sp. nov., based on 30 exceptionally well-preserved specimens from the Middle Triassic (Pelsonian, Anisian) Luoping Lagerstatte of eastern Yunnan, China. The discovery represents the oldest known secondary sexual characteristics in Neopterygii. These characteristics, including pointed tubercles on cranial bones, scales and fins, and hook-like contact organ anterior to the anal fin, have three inferred primary functions: maintenance of body contact between the sexes during prespawning behavior or spawning; stimulation of the females during breeding; and defense of nests and territories. Lacking a specialized anal fin in the presumed males, Venusichthys would likely have a different reproductive strategy from peltopleurids and other potentially viviparous stem-neopterygians. Moreover, Venusichthys shows a unique character combination distinguished from any other stem-neopterygian families and consequently represents a new family of this clade. As such, the new finding provides an important addition for understanding the behavior, reproduction, and early diversification of Neopterygii. |
| WOS关键词 | MASS EXTINCTION ; SELECTION |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000369929800009 |
| 资助机构 | National Natural Science Foundation of China(41272002) ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences)(143114) |
| 源URL | [http://124.16.247.212/handle/311034/7132]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Zhejiang Museum Nat Hist, Hangzhou 310014, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Guang-Hui,Zhao, Li-Jun. A Middle Triassic stem-neopterygian fish from China shows remarkable secondary sexual characteristics[J]. SCIENCE BULLETIN,2016,61(4):338-344. |
| APA | Xu, Guang-Hui,&Zhao, Li-Jun.(2016).A Middle Triassic stem-neopterygian fish from China shows remarkable secondary sexual characteristics.SCIENCE BULLETIN,61(4),338-344. |
| MLA | Xu, Guang-Hui,et al."A Middle Triassic stem-neopterygian fish from China shows remarkable secondary sexual characteristics".SCIENCE BULLETIN 61.4(2016):338-344. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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