A Middle Triassic stem-neopterygian fish from China shows remarkable secondary sexual characteristics

doi:10.1007/s11434-016-1007-0

IVPP-IR > 中科院古脊椎所（2000年以后）

	A Middle Triassic stem-neopterygian fish from China shows remarkable secondary sexual characteristics
	Xu, Guang-Hui 1; Zhao, Li-Jun 2
	2016-02-01
发表期刊	SCIENCE BULLETIN
卷号	61 期号:4 页码:338-344
文章类型	Article
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.
关键词	Sexual Dimorphism Breeding Tubercles Venusichthyidae Neopterygii Actinopterygii
WOS标题词	Science & Technology
DOI	10.1007/s11434-016-1007-0
关键词[WOS]	MASS EXTINCTION ; SELECTION
收录类别	SCI
语种	英语
项目资助者	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)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000369929800009
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7132
专题	中科院古脊椎所（2000年以后）
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.

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