Early members of 'living fossil' lineage imply later origin of modern ray-finned fishes

doi:10.1038/nature23654

IVPP-IR > 中科院古脊椎所（2000年以后）

	Early members of 'living fossil' lineage imply later origin of modern ray-finned fishes
	Giles, Sam 1; Xu, Guang-Hui 2; Near, Thomas J.3,4; Friedman, Matt 1,5,6
	2017-09-14
发表期刊	NATURE
卷号	549 期号:7671 页码:265-+
文章类型	Article
摘要	Modern ray-finned fishes (Actinopterygii) comprise half of extant vertebrate species and are widely thought to have originated before or near the end of the Middle Devonian epoch (around 385 million years ago)(1-4). Polypterids (bichirs and ropefish) represent the earliest-diverging lineage of living actinopterygians, with almost all Palaeozoic taxa interpreted as more closely related to other extant actinopterygians than to polypterids(5-10). By contrast, the earliest material assigned to the polypterid lineage is mid-Cretaceous in age (around 100 million years old)(11), implying a quarter-of-a-billion-year palaeontological gap. Here we show that scanilepiforms, a widely distributed radiation from the Triassic period (around 252-201 million years ago), are stem polypterids. Importantly, these fossils break the long polypterid branch and expose many supposedly primitive features of extant polypterids as reversals. This shifts numerous Palaeozoic ray-fins to the actinopterygian stem, reducing the minimum age for the crown lineage by roughly 45 million years. Recalibration of molecular clocks to exclude phylogenetically reassigned Palaeozoic taxa results in estimates that the actinopterygian crown lineage is about 20-40 million years younger than was indicated by previous molecular analyses(1-4). These new dates are broadly consistent with our revised palaeontological timescale and coincident with an interval of conspicuous morphological and taxonomic diversification among ray-fins centred on the Devonian-Carboniferous boundary(12-14). A shifting timescale, combined with ambiguity in the relationships of late Palaeozoic actinopterygians, highlights this part of the fossil record as a major frontier in understanding the evolutionary assembly of modern vertebrate diversity.
WOS标题词	Science & Technology
DOI	10.1038/nature23654
关键词[WOS]	ACTINOPTERYGII ; DIVERSIFICATION ; PHYLOGENY ; INTERRELATIONSHIPS ; LEPISOSTEIFORMES ; SCANILEPIFORM ; POLYPTERUS ; EVOLUTION ; INFERENCE ; CHINA
收录类别	SCI
语种	英语
项目资助者	Junior Research Fellowship from Christ Church, Oxford ; L'Oreal-UNESCO For Women in Science Fellowship ; National Natural Science Foundation of China(41672001) ; National Science Foundation(ANT-134166) ; Bingham Oceanographic Fund from the Peabody Museum of Natural History, Yale University ; Philip Leverhulme Prize(PLP-2012-130) ; Leverhulme Trust Project Grant(RPG-2012-65A)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000410555900044
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/8037
专题	中科院古脊椎所（2000年以后）
作者单位	1.Univ Oxford, Dept Earth Sci, South Parks Rd, Oxford OX1 3AN, England 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 3.Yale Univ, Dept Ecol & Evolutionary Biol, 165 Prospect St, New Haven, CT 06520 USA 4.Yale Univ, Peabody Museum Nat Hist, 165 Prospect St, New Haven, CT 06520 USA 5.Univ Michigan, Museum Paleontol, 1109 Geddes Ave, Ann Arbor, MI 48109 USA 6.Univ Michigan, Dept Earth & Environm Sci, 1109 Geddes Ave, Ann Arbor, MI 48109 USA
推荐引用方式 GB/T 7714	Giles, Sam,Xu, Guang-Hui,Near, Thomas J.,et al. Early members of 'living fossil' lineage imply later origin of modern ray-finned fishes[J]. NATURE,2017,549(7671):265-+.
APA	Giles, Sam,Xu, Guang-Hui,Near, Thomas J.,&Friedman, Matt.(2017).Early members of 'living fossil' lineage imply later origin of modern ray-finned fishes.NATURE,549(7671),265-+.
MLA	Giles, Sam,et al."Early members of 'living fossil' lineage imply later origin of modern ray-finned fishes".NATURE 549.7671(2017):265-+.

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