First record of Saurichthys (Actinopterygii: Saurichthyidae) from the Late Triassic of eastern Paleo-Tethys

	First record of Saurichthys (Actinopterygii: Saurichthyidae) from the Late Triassic of eastern Paleo-Tethys
	Fang Gengyu 3; Sun Yuanlin 2; Ji Cheng 1; Wu Feixiang 3
刊名	VERTEBRATA PALASIATICA
	2023
卷号	61 期号:1 页码:1-16
关键词	关岭生物群贵州云南东特提斯洋晚三叠世龙鱼类 Guanling biota Guizhou Yunnan eastern Paleo-Tethys Late Triassic Saurichthys
ISSN号	2096-9899
英文摘要	The saurichthyiform fishes, characterized by a pointed rostrum and a streamlined long and slender body plan, ranked among the top predators of the ichthyofauna in the Early Mesozoic oceanic ecosystem. In a cosmopolitan pattern, these fishes rapidly radiated after the end-Permian mass extinction (EPME) and diversified morphologically and ecologically during the Middle Triassic. Thereafter, they seemingly showed a notable shrinkage from a global distribution to an occurrence basically restricted to the western Paleo-Tethys realm since the Late Triassic. Specifically, there is no saurichthyiform fossil record so far from the marine Late Triassic of South China (eastern Paleo-Tethys), where contrastingly they were highly diversified in stratigraphically older Lagerstatten (Middle Triassic Panxian-Luoping and Xingyi biotas). Here we report the discovery of Saurichthys taotie sp. nov. from the Guanling biota of Guizhou and Yunnan provinces, southwestern China. This new species is a medium-sized Saurichthys featured by subtriangular subopercles ornamented with densely arranged vertical striae, faint ornamentation on the posterior part of the skull roof, and strong longitudinal ridges decorating the anterodorsal surface of the rostrum. By marking its own group’s first occurrence in the Late Triassic of eastern Paleo-Tethyan province, Saurichthys taotie suggests that the saurichthyiform fishes were actually much more widespread than previously thought during that geological stage when they showed a considerable decline in the diversity. By still possessing some features previously only seen in its Early Triassic congeners elsewhere, Saurichthys taotie sheds new light on the evolutionary and paleobiogeographical history of saurichthyiform fishes.
语种	英语
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/41972]
专题	中国科学院南京地质古生物研究所
作者单位	1.中国科学院南京地质古生物研究所 2.北京大学 3.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	Fang Gengyu,Sun Yuanlin,Ji Cheng,et al. First record of Saurichthys (Actinopterygii: Saurichthyidae) from the Late Triassic of eastern Paleo-Tethys[J]. VERTEBRATA PALASIATICA,2023,61(1):1-16.
APA	Fang Gengyu,Sun Yuanlin,Ji Cheng,&Wu Feixiang.(2023).First record of Saurichthys (Actinopterygii: Saurichthyidae) from the Late Triassic of eastern Paleo-Tethys.VERTEBRATA PALASIATICA,61(1),1-16.
MLA	Fang Gengyu,et al."First record of Saurichthys (Actinopterygii: Saurichthyidae) from the Late Triassic of eastern Paleo-Tethys".VERTEBRATA PALASIATICA 61.1(2023):1-16.