The oldest species of Peltoperleidus (Louwoichthyiformes, Neopterygii) from the Middle Triassic (Anisian) of China, with phylogenetic and biogeographic implications

doi:10.7717/peerj.12225

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	The oldest species of Peltoperleidus (Louwoichthyiformes, Neopterygii) from the Middle Triassic (Anisian) of China, with phylogenetic and biogeographic implications
	Xu, Guang-Hui 1,2
刊名	PEERJ
	2021-09-29
卷号	9 页码:26
关键词	Osteology Phylogeny Louwoichthyiformes Neopterygii Triassic
ISSN号	2167-8359
DOI	10.7717/peerj.12225
通讯作者	Xu, Guang-Hui(xuguanghui@ivpp.ac.cn)
英文摘要	The previously alleged 'perleidid' genus Peltoperleidus is a stem-neopterygian fish taxon with two or three horizontal rows of notably deepened flank scales. Until recently, members of this genus were known only from the Ladinian (late Middle Triassic) or near the Anisian/Ladinian boundary (similar to 242 Ma) in southern Switzerland and northern Italy. Here, I report the discovery of a new species of the genus, Peltoperleidus asiaticus sp. nov., based on three well-preserved specimens from the Anisian (early Middle Triassic, similar to 244 Ma) of Luoping, eastern Yunnan, China. The discovery extends the geological range of Peltoperleidus by approximately two million years and documents the first record of the genus in Asia. Similar to its relatives (represented by P. macrodontus) from Europe, P. asiaticus sp. nov. is likely a small-sized durophagous predator with dentition combining grasping and crushing morphologies. Results of a cladistic analysis unite four species of Peltoperleidus as a monophyletic group within the Louwoichthyiformes, and suggest that the presence of two horizontal rows of notably deepened scales was independently evolved in Peltoperleidus and another stem-neopterygian taxon Altisolepis. P. asiaticus sp. nov. is nested at the base of Peltoperleidus, and a new family Peltoperleididae is proposed for the genus, contrasting the previous placement of Peltoperleidus in the poorly defined, paraphyletic Perleididae'. Comparative studies of the basal peltoperleidid from China with its younger relatives from Europe provide new insights into the evolutionary origin and paleogeographic distribution of this Glade.
资助项目	Strategic Priority Research Program (B) of Chinese Academy of Sciences[XDB 26000000] ; Strategic Priority Research Program (B) of Chinese Academy of Sciences[18000000] ; National Natural Science Foundation of China (NSFC)[42172008] ; National Natural Science Foundation of China (NSFC)[41672001] ; National Natural Science Foundation of China (NSFC)[41688103]
WOS关键词	YUNNAN PROVINCE ; PROSANTO-FORMATION ; ACTINOPTERYGII ; FISH ; OSTEICHTHYES ; EVOLUTION ; GENUS ; PERLEIDIFORMES ; SWITZERLAND ; DIVERSITY
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	PEERJ INC
WOS记录号	WOS:000707237000004
资助机构	Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/19034]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Xu, Guang-Hui
作者单位	1.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xu, Guang-Hui. The oldest species of Peltoperleidus (Louwoichthyiformes, Neopterygii) from the Middle Triassic (Anisian) of China, with phylogenetic and biogeographic implications[J]. PEERJ,2021,9:26.
APA	Xu, Guang-Hui.(2021).The oldest species of Peltoperleidus (Louwoichthyiformes, Neopterygii) from the Middle Triassic (Anisian) of China, with phylogenetic and biogeographic implications.PEERJ,9,26.
MLA	Xu, Guang-Hui."The oldest species of Peltoperleidus (Louwoichthyiformes, Neopterygii) from the Middle Triassic (Anisian) of China, with phylogenetic and biogeographic implications".PEERJ 9(2021):26.