气候变化领域集成服务门户(CCPortal): A diverse trackway-dominated marine ichnoassemblage from the Lower Triassic in the northern Paleotethys: Ichnology and implications for biotic recovery

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DOI	10.1016/j.palaeo.2017.11.059
	A diverse trackway-dominated marine ichnoassemblage from the Lower Triassic in the northern Paleotethys: Ichnology and implications for biotic recovery
	Feng X.; Chen Z.-Q.; Benton M.J.; Wu S.; Bottjer D.J.; Thompson J.R.
发表日期	2019
ISSN	0031-0182
起始页码	124
结束页码	140
卷号	519
英文摘要	We document a diverse ichnoassemblage from marine interbeds of the Lower Triassic terrestrial succession in the Houzhougongmiao (HZGM) section of Shaanxi Province, northwestern China. Integrated biostratigraphic data (bivalve, palynology and conchostracan) reveals that the ichnofossil-bearing marine beds are Griesbachian (Induan, Early Triassic) in age. The marine interbeds are interpreted to be the result of the earliest Triassic transgression of the Paleotethys Ocean northward onto the southern margin of the North China Craton. The HZGM ichnoassemblage includes 17 ichnospecies in 16 ichnogenera and is dominated by shallow-tier Asteriacites and Biformites produced by ophiuroids, the scratch marks or trackways Dimorphichnus, Diplichnites, and Monomorphichnus produced by arthropods, and a rare occurrence of the fish swimming trace Undichna. Of these, the hook-shaped imprints Biformites, representing the moving arm impressions of ophiuroids, are reported for the first time from the Lower Triassic. These trace-makers are interpreted to have lived in a low energy, semi-restricted, shallow embayment environment. Although possessing relatively high ichnodiversity, the HZGM ichnoassemblage differs clearly from other coeval diverse ichnocoenoses in the lack of complex burrow forms (i.e. Thalassinoides, Diplocraterion, or Rhizocorallium) and a mixed layer, and in having abundant shallow tiers. In addition, high ichnodiversity may occur at both high and low latitudes during the Griesbachian (or Induan). Accordingly, the resting trace or trackway-dominated ichnoassemblage from the HZGM section may represent the initial recovery of the trace-maker ecosystem after the Permian-Triassic mass extinction. Trace-makers such as arthropods and ophiuroids were perhaps opportunistic organisms that proliferated in marginal marine settings when other biota were still suffering post-extinction biotic depletion and environmental stresses. © 2017 Elsevier B.V.
英文关键词	Arthropods; Griesbachian; North China; Ophiuroids; Opportunistic organisms; Shallow tiers
语种	英语
scopus关键词	arthropod; biostratigraphy; biotic factor; fossil assemblage; ichnology; marine environment; mass extinction; palynology; palynomorph; terrestrial ecosystem; transgression; Triassic; China; North China Block; Shaanxi; Arthropoda; Asteriacites; Bivalvia; Diplichnites; Diplocraterion; Monomorphichnus; Ophiuroidea; Rhizocorallium; Thalassinoides; Undichna
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151047
作者单位	State Key Laboratory of Biogeology and Environmental Geology, School of Earth Science, China University of Geosciences (Wuhan), Wuhan, 430074, China; School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, United Kingdom; Department of Earth Sciences, University of Southern California, California, Los Angeles 90089, United States
推荐引用方式 GB/T 7714	Feng X.,Chen Z.-Q.,Benton M.J.,et al. A diverse trackway-dominated marine ichnoassemblage from the Lower Triassic in the northern Paleotethys: Ichnology and implications for biotic recovery[J],2019,519.
APA	Feng X.,Chen Z.-Q.,Benton M.J.,Wu S.,Bottjer D.J.,&Thompson J.R..(2019).A diverse trackway-dominated marine ichnoassemblage from the Lower Triassic in the northern Paleotethys: Ichnology and implications for biotic recovery.Palaeogeography, Palaeoclimatology, Palaeoecology,519.
MLA	Feng X.,et al."A diverse trackway-dominated marine ichnoassemblage from the Lower Triassic in the northern Paleotethys: Ichnology and implications for biotic recovery".Palaeogeography, Palaeoclimatology, Palaeoecology 519(2019).