Coelacanths from the Middle Triassic Luoping Biota, Yunnan, South China,;with the earliest evidence of ovoviviparity

doi:10.4202/app.2011.0066

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	Coelacanths from the Middle Triassic Luoping Biota, Yunnan, South China,;with the earliest evidence of ovoviviparity
	Wen, Wen 10; Zhang, Qi-Yue ; Hu, Shi-Xue ; Benton, Michael J.; Zhou, Chang-Yong ; Tao, Xie ; Huang, Jin-Yuan ; Chen, Zhong-Qiang
刊名	ACTA PALAEONTOLOGICA POLONICA
	2013
卷号	58 期号:1 页码:175-193
关键词	Actinistia Coelacanthoidei Latimerioidei ovoviviparity Luoping Anisian Triassic South China
ISSN号	0567-7920
DOI	10.4202/app.2011.0066
英文摘要	The fossil record of coelacanths is patchy, with very few taxa known from the Triassic of Asia. We report here two new genera and species of coelacanths from the Luoping Biota, a recently found site of exceptional fossil preservation from Yunnan, South China. The first new taxon, Luopingcoelacanthus eurylacrimalis, is based on four specimens, which together show most aspects of the anatomy. One specimen shows two small coelacanths inside the ventral portion of the abdominal cavity, and these are interpreted as intrauterine embryos, close to birth size, based on comparisons with previously reported embryos of the fossil coelacanths Rhabdoderma and Undina, and the extant genus Latimeria. Our new find extends the evidence for ovoviviparity in coelacanths back from the Late Jurassic to the Middle Triassic. The second new taxon, Yunnancoelacanthus acrotuberculatus, is based on one specimen, and differs from Luopingcoelacanthus in the dentary, lachrymojugal, number of rays of the first dorsal fin, and especially in the ornament on dermal bones and scales. A cladistic analysis shows that the new taxa are closest relatives to the derived clade Latimerioidei. The relatively high diversity of coelacanths in the Early Triassic, and adaptations of living Latimeria to low-oxygen conditions, suggests that the group may have included 'disaster taxa' that benefited from anoxic and dysoxic ocean conditions in the aftermath of the end-Permian mass extinction.
学科主题	古生物学
WOS关键词	PERMIAN MASS EXTINCTION ; LATIMERIA-CHALUMNAE ; OLDEST COELACANTH ; LIVING ; COELACANTH ; FOSSIL FISHES ; SARCOPTERYGII ; ACTINISTIA ; ACTINOPTERYGII ; VIVIPARITY ; REPRODUCTION
WOS研究方向	Paleontology
语种	英语
出版者	INST PALEOBIOLOGII PAN
WOS记录号	WOS:000318462900016
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39982]
专题	中国地质调查局成都地质调查中心
作者单位	1.[Wen, Wen 2.Zhang, Qi-Yue 3.Hu, Shi-Xue 4.Zhou, Chang-Yong 5.Tao, Xie 6.Chengdu Inst Geol & Mineral Resources, Chengdu 610081, Peoples R China. 7.Chengdu Univ Technol, Chengdu 610059, Peoples R China. 8.[Benton, Michael J.] Univ Bristol, Sch Earth Sci, Bristol BS8 1RJ, Avon, England. 9.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China. 10.中国地质调查局成都地质调查中心
推荐引用方式 GB/T 7714	Wen, Wen,Zhang, Qi-Yue,Hu, Shi-Xue,et al. Coelacanths from the Middle Triassic Luoping Biota, Yunnan, South China,;with the earliest evidence of ovoviviparity[J]. ACTA PALAEONTOLOGICA POLONICA,2013,58(1):175-193.
APA	Wen, Wen.,Zhang, Qi-Yue.,Hu, Shi-Xue.,Benton, Michael J..,Zhou, Chang-Yong.,...&Chen, Zhong-Qiang.(2013).Coelacanths from the Middle Triassic Luoping Biota, Yunnan, South China,;with the earliest evidence of ovoviviparity.ACTA PALAEONTOLOGICA POLONICA,58(1),175-193.
MLA	Wen, Wen,et al."Coelacanths from the Middle Triassic Luoping Biota, Yunnan, South China,;with the earliest evidence of ovoviviparity".ACTA PALAEONTOLOGICA POLONICA 58.1(2013):175-193.