气候变化领域集成服务门户(CCPortal): The youngest known Dictyodora from the Late Permian(Lopingian) deep sea in West Qinling; central China

CCPortal

DOI	10.1016/j.palaeo.2020.109948
	The youngest known Dictyodora from the Late Permian(Lopingian) deep sea in West Qinling; central China
	Zhang L.-J.; Fan R.-Y.; Dang Z.-Y.; Gong Y.-M.
发表日期	2020
ISSN	0031-0182
卷号	558
英文摘要	Dictyodora has been generally considered an ichnogenus with a restricted temporal range from the Cambrian to the Mississippian. Until now, there have been no reports of Dictyodora after the Mississippian. Here we report on well-preserved and abundant Dictyodora from deep-sea sediments of the Lopingian Maomaolong Formation in West Qinling, central China, which is hitherto the youngest occurrence of Dictyodora and extends the stratigraphic range of Dictyodora to the Late Permian. Two ichnospecies of Dictyodora are distinguished: D. zimmermanni and D. cf. scotica. Unlike the small-sized Dictyodora in the pre-Pennsylvanian, the three-dimensional morphology of Dictyodora studied here shows larger amplitudes and longer limbs with clearly inclined walls and basal burrows, which are interpreted to have been made by a soft-bodied worm-like organism with a snorkel-like organ as similarly documented in previous studies. Detailed systematic ichnological features and SEM and EDS results indicate that Dictyodora here is not simply a respiration structure made during the locomotion of the trace maker, but resulted from active filling by the trace maker. Dictyodora is probably not a good indicator of the deep-marine environment in the Paleozoic. From our dataset, Dictyodora originated from the shallow-marine environment in the early Cambrian, then migrated into the deep sea in the Ordovician and the marginal-marine setting in the Wenlock, and was finally restricted to the deep-marine environment in the Carboniferous and Permian. Both Psammichnites and Dictyodora are structures made by organisms with snorkel-like organs, and both were eliminated during the end-Permian mass extinction. © 2020 Elsevier B.V.
英文关键词	end-Permian mass extinction; Evolution; Ichnology; Trace fossil; Turbidite
语种	英语
scopus关键词	Cambrian; Carboniferous; deep sea; Lopingian; Mississippian; morphology; Ordovician; respiration; three-dimensional modeling; trace fossil; China; Psammichnites
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/150352
作者单位	Institute of Resources and Environment, Key Laboratory of Biogenic Traces & Sedimentary Minerals of Henan Province, Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Henan Polytechnic University, Jiaozuo, 454003, China; School of Earth Science, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Zhang L.-J.,Fan R.-Y.,Dang Z.-Y.,et al. The youngest known Dictyodora from the Late Permian(Lopingian) deep sea in West Qinling; central China[J],2020,558.
APA	Zhang L.-J.,Fan R.-Y.,Dang Z.-Y.,&Gong Y.-M..(2020).The youngest known Dictyodora from the Late Permian(Lopingian) deep sea in West Qinling; central China.Palaeogeography, Palaeoclimatology, Palaeoecology,558.
MLA	Zhang L.-J.,et al."The youngest known Dictyodora from the Late Permian(Lopingian) deep sea in West Qinling; central China".Palaeogeography, Palaeoclimatology, Palaeoecology 558(2020).