amiddletriassickyphosichthyiformfromyunnanchinaandphylogeneticreassessmentofearlyginglymodians

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	amiddletriassickyphosichthyiformfromyunnanchinaandphylogeneticreassessmentofearlyginglymodians
	Xu Guanghui; Ma Xinying; Wu Feixiang; Ren Yi
	2019
发表期刊	古脊椎动物学报
ISSN	1000-3118
卷号	57 期号:3 页码:181
摘要	Ginglymodi are a subgroup of holostean fishes, including living gars and their closely-related fossil taxa. The early Middle Triassic(Anisian, ~244 Ma) kyphosichthyiforms from Yunnan and Guizhou, China represent the earliest records of this clade. Here, we report the discovery of a new kyphosichthyiform fish, Yudaiichthys eximius gen. et sp. nov., on the basis of four wellpreserved specimens from the second(upper) member of Guanling Formation in Luoping, eastern Yunnan. The new discovery stimulated a phylogenetic analysis to reassess the interrelationships of the Kyphosichthyiformes and their relationships with other early ginglymodians. Results of our analysis indicate that the previously defined family Kyphosichthyidae and the genus Sangiorgioichthys are paraphyletic. A revised Kyphosichthyiformes is proposed here, and it is divided into two families, Kyphosichthyidae and Lashanichthyidae fam. nov. The family Kyphosichthyidae is restricted to include two genera Kyphosichthys and Fuyuanichthys. The Chinese “Sangiorgioichthys” species are removed into a new genus Lashanichthys, which is recovered as a taxon sister to Yudaiichthys gen. nov., and both genera are grouped into the new family, Lashanichthyidae. Sangiorgio ich thys is restricted to include two species(S. aldae and S. valmarensis) from the late Middle Triassic(Ladinian) of the Monte San Giorgio area. The genus is removed out of the Kyphosichthyiformes and is recovered as the sister taxon of the Semionotiformes-Lepisosteiformes clade. The revised topology provides new insights into the anatomical evolution during the earliest ginglymodian history.
语种	英语
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/11422
专题	中国科学院古脊椎动物与古人类研究所
作者单位	中国科学院古脊椎动物与古人类研究所
第一作者单位	中国科学院古脊椎动物与古人类研究所
推荐引用方式 GB/T 7714	Xu Guanghui,Ma Xinying,Wu Feixiang,et al. amiddletriassickyphosichthyiformfromyunnanchinaandphylogeneticreassessmentofearlyginglymodians[J]. 古脊椎动物学报,2019,57(3):181.
APA	Xu Guanghui,Ma Xinying,Wu Feixiang,&Ren Yi.(2019).amiddletriassickyphosichthyiformfromyunnanchinaandphylogeneticreassessmentofearlyginglymodians.古脊椎动物学报,57(3),181.
MLA	Xu Guanghui,et al."amiddletriassickyphosichthyiformfromyunnanchinaandphylogeneticreassessmentofearlyginglymodians".古脊椎动物学报 57.3(2019):181.