期刊
JOURNAL OF EARTH SCIENCE
卷 29, 期 4, 页码 854-863出版社
CHINA UNIV GEOSCIENCES, WUHAN
DOI: 10.1007/s12583-018-0794-4
关键词
Sinusichnus sinuosus; decapod crustacean; trace fossil; Middle Triassic; Luoping; southwestern China
资金
- ARCDP discovery grant [DP150100690]
- CAS Pioneer Hundred Talents Program
- State Key Laboratory of Biogeology and Environmental Biology [GBL21410]
- China University of Geosciences (Wuhan)
- National Natural Science Foundation of China [41502013]
- China Geological Survey projects [DD20160020, 1212011140051, 12120114030601, 1212010610211]
The Luoping Biota discovered from the early Middle Triassic (Anisian) Guanling Formation of southwestern China represents a fully recovered shallow marine ecosystem, marking the end point of Early Triassic biotic recovery following the end-Permian mass extinction. Contemporaneously preserved are prolific trace fossils, which offer good opportunities to understand the palaeoecology of marine invertebrates from a fully recovered shallow marine ecosystem. Here we present a newly discovered sinuous branching burrow from the fossil-bearing unit in Member II of the Guanling Formation. Several features, including the horizontal regular sinuous nature, the branching pattern, typical H-junction, and the small wavelength/amplitude ratio of these sinuous structures within the burrow systems justify assignment of these traces as Sinusichnus sinuosus, a trace possibly produced by decapod crustaceans. Close association of S. sinuosus with Rhizocorallium commune suggests a deposit-feeding strategy of these trace makers. The newly reported Anisian material from the Guanling Formation in Luoping represents first report of Sinusichnus from South China. The global record of Sinusichnus occurrence suggests that these burrows might have an older history than Early Middle Triassic.
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