A Middle Triassic stem-neopterygian fish from China sheds new light on the peltopleuriform phylogeny and internal fertilization

doi:10.1007/s11434-016-1189-5

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	A Middle Triassic stem-neopterygian fish from China sheds new light on the peltopleuriform phylogeny and internal fertilization
	Xu, Guang-Hui; Ma, Xin-Ying
刊名	SCIENCE BULLETIN
	2016-11-01
卷号	61 期号:22 页码:1766-1774
关键词	Sexual Dimorphism Viviparity Peltopleuridae Thoracopteridae Triassic
DOI	10.1007/s11434-016-1189-5
文献子类	Article
英文摘要	Internal fertilization and viviparity are easily observed and well studied in living neopterygian fishes (14 teleostean families), but they are difficult to identify in extinct taxa due to the limitation of the fossil record. The Peltopleuriformes from the Middle to Late Triassic of Europe and South China are a stem group of Neopterygii that may have first evolved internal fertilization and viviparity in this clade because they show a highly modified anal fin in presumed males resembling the intromittent organ in living viviparous teleosts. Until recently, Peltopleurus lissocephalus and P. rugosus from the Ladinian/Anisian boundary (similar to 242 Ma) of Monte San Giorgio area in Switzerland and Italy represent the oldest record of Peltopleuriformes, and the phylogenetic interrelationships of this group remain controversial. Here, we report the discovery of a new peltopleuriform, Peltopleurus nitidus sp. nov., based on eleven well-preserved specimens from the early Middle Triassic (Pelsonian, Anisian, similar to 244 Ma) of Luoping, eastern Yunnan, China. The discovery documents the oldest convincing peltopleuriform, extending the geological range of this clade by proximately two million years. Results of the phylogenetic analysis recover P. nitidus at the base of Peltopleuridae, and provide robust support for the sister-group relationships of Peltopleuridae with Thoracopteridae within the Peltopleuriformes. The male anal fin of P. nitidus shows a primitive condition unknown in other peltopleuriforms. Comparative studies of the male anal fin in P. nitidus and other peltopleuriforms shed new light on the internal fertilization in this group.
WOS关键词	MASS EXTINCTION ; FOSSIL FISHES ; VIVIPARITY ; EVOLUTION ; ACTINOPTERYGII ; TELEOSTEI ; GENUS
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000388645200011
资助机构	National Natural Science Foundation of China(41672001 ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)(143114) ; Chinese Academy of Sciences ; 41272002)
内容类型	期刊论文
源URL	[http://124.16.247.212/handle/311034/7485]
专题	古脊椎动物与古人类研究所_图书馆1
作者单位	Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Xu, Guang-Hui,Ma, Xin-Ying. A Middle Triassic stem-neopterygian fish from China sheds new light on the peltopleuriform phylogeny and internal fertilization[J]. SCIENCE BULLETIN,2016,61(22):1766-1774.
APA	Xu, Guang-Hui,&Ma, Xin-Ying.(2016).A Middle Triassic stem-neopterygian fish from China sheds new light on the peltopleuriform phylogeny and internal fertilization.SCIENCE BULLETIN,61(22),1766-1774.
MLA	Xu, Guang-Hui,et al."A Middle Triassic stem-neopterygian fish from China sheds new light on the peltopleuriform phylogeny and internal fertilization".SCIENCE BULLETIN 61.22(2016):1766-1774.