First Report of Small Skeletal Fossils from the Upper Guojiaba Formation (Series 2, Cambrian), Southern Shaanxi, South China

被引:7
作者
Luo, Mei [1 ]
Liu, Fan [1 ]
Liang, Yue [1 ]
Strotz, Luke C. [1 ,2 ,3 ,4 ]
Wang, Jiayue [1 ]
Hu, Yazhou [1 ]
Song, Baopeng [1 ]
Holmer, Lars E. [1 ,5 ]
Zhang, Zhifei [1 ]
机构
[1] Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Shaanxi Key Lab Early Life & Environm, Xian 710069, Peoples R China
[2] Univ Kansas, Biodivers Inst, Lawrence, KS 66045 USA
[3] Univ Kansas, Dept Ecol & Evolutionary Biol, Lawrence, KS 66045 USA
[4] Univ Vienna, Dept Palaeontol, Althanstr 14, A-1090 Vienna, Austria
[5] Uppsala Univ, Dept Earth Sci, Palaeobiol, SE-75236 Uppsala, Sweden
来源
BIOLOGY-BASEL | 2023年 / 12卷 / 07期
基金
中国国家自然科学基金;
关键词
small skeletal fossils (SSFs); fossil assemblages; early Cambrian; biostratigraphy; southern Shaanxi; SMALL SHELLY FOSSILS; SOFT-TISSUE PRESERVATION; 3 GORGES AREA; SPHENOTHALLUS-HALL; GLOBAL CORRELATION; NORTH CHINA; BRACHIOPODS; CHENGJIANG; PROVINCE; PALEOBIOGEOGRAPHY;
D O I
10.3390/biology12070902
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Simple Summary Small skeletal fossils are reported for the first time from the early Cambrian Guojiaba Formation, southern Shaanxi, China. All specimens were recovered from bioclastic limestone interbeds and encompass a wide variety of skeletal clades, including brachiopods, sphenothallids, archaeocyaths, bradoriids, sponge spicules, echinoderm plates, and trilobite spines. The archaeocyaths described herein are considerably older than those described from the Xiannvdong Formation, which was previously assumed to contain the lowest archaeocyath-bearing horizons in South China. The brachiopod Lingulellotreta yuanshanensis is recorded for the first time from the Fucheng area, with previous records confined mainly to the Chengjiang Fauna-bearing Yu'anshan Formation in the lower Cambrian, the eastern Yunnan Province. Micro-morphological and elemental analyses of the small skeletal fossil assemblages were carried out using SEM, BSEM, and Micro X-ray fluorescence. The skeletal fauna in the Guojiaba Formation resembles the assemblages recovered from the upper Yu'anshan Formation (Chengjiang Fauna) in eastern Yunnan Province. Based on the recovered assemblage, the biostratigraphic age of the Guojiaba Formation correlates with the Chiungchussuan Stage (Stage 3 of Cambrian Series 2). A small skeletal fossil assemblage is described for the first time from the bioclastic limestone interbeds of the siltstone-dominated Guojiaba Formation, southern Shaanxi, China. The carbonate-hosted fossils include brachiopods (Eohadrotreta zhujiahensis, Eohadrotreta zhenbaensis, Spinobolus sp., Kuangshanotreta malungensis, Kyrshabaktella sp., Lingulellotreta yuanshanensis, Eoobolus incipiens, and Eoobolus sp.), sphenothallids (Sphenothallus sp.), archaeocyaths (Robustocyathus sp. and Yukonocyathus sp.), bradoriids (Kunmingella douvillei), chancelloriids sclerites (Onychia sp., Allonnia sp., Diminia sp., Archiasterella pentactina, and Chancelloria cf. eros), echinoderm plates, fragments of trilobites (Eoredlichia sp.), and hyolithelminths. The discovery of archaeocyaths in the Guojiaba Formation significantly extends their stratigraphic range in South China from the early Tsanglangpuian at least to the late Chiungchussuan. Thus, the Guojiaba Formation now represents the lowest known stratigraphic horizon where archaeocyath fossils have been found in the southern Shaanxi area. The overall assemblage is most comparable, in terms of composition, to Small skeletal fossil (SSF) assemblages from the early Cambrian Chengjiang fauna recovered from the Yu'anshan Formation in eastern Yunnan Province. The existing position that the Guojiaba Formation is correlated with Stage 3 in Cambrian Series 2 is strongly upheld based on the fossil assemblage recovered in this study.
引用
收藏
页数:25
相关论文
共 118 条
[1]  
Alvaro JJ, 2002, GEOBIOS-LYON, V35, P397
[2]  
Bengtson S., 1990, EARLY CAMBRIAN FOSSI, P364
[3]   Global correlation of the early Cambrian of South Australia: Shelly fauna of the Dailyatia odyssei Zone [J].
Betts, Marissa J. ;
Paterson, John R. ;
Jago, James B. ;
Jacquet, Sarah M. ;
Skovsted, Christian B. ;
Topper, Timothy P. ;
Brock, Glenn A. .
GONDWANA RESEARCH, 2017, 46 :240-279
[4]   A new lower Cambrian shelly fossil biostratigraphy for South Australia [J].
Betts, Marissa J. ;
Paterson, John R. ;
Jago, James B. ;
Jacquet, Sarah M. ;
Skovsted, Christian B. ;
Topper, Timothy P. ;
Brock, Glenn A. .
GONDWANA RESEARCH, 2016, 36 :176-208
[5]   PALEOECOLOGY OF SPHENOTHALLUS ON AN UPPER ORDOVICIAN HARDGROUND [J].
BODENBENDER, BE ;
WILSON, MA ;
PALMER, TJ .
LETHAIA, 1989, 22 (02) :217-225
[6]   Brachiopod-dominated communities and depositional environment of the Guanshan Konservat-Lagerstatte, eastern Yunnan, China [J].
Chen, Feiyang ;
Brock, Glenn A. ;
Zhang, Zhiliang ;
Laing, Brittany ;
Ren, Xinyi ;
Zhang, Zhifei .
JOURNAL OF THE GEOLOGICAL SOCIETY, 2021, 178 (01)
[7]  
Chen R.Y., 1987, J NW U NAT SCI ED, V2, P63
[8]  
Chi S.Y., 1940, B GEOL SOC CHINA, V20, P121, DOI [10.1111/j.1755-6724.1940.mp20002002.x, DOI 10.1111/J.1755-6724.1940.MP20002002.X]
[9]   BRACHIOPODS FROM THE BYRD GROUP (CAMBRIAN SERIES 2, STAGE 4) CENTRAL TRANSANTARCTIC MOUNTAINS, EAST ANTARCTICA: BIOSTRATIGRAPHY, PHYLOGENY AND SYSTEMATICS [J].
Claybourn, Thomas M. ;
Skovsted, Christian B. ;
Holmer, Lars E. ;
Pan, Bing ;
Myrow, Paul M. ;
Topper, Timothy P. ;
Brock, Glenn A. .
PAPERS IN PALAEONTOLOGY, 2020, 6 (03) :349-383
[10]   Stratigraphic investigations of carbon isotope anomalies and Neoproterozoic ice ages in Death Valley, California [J].
Corsetti, FA ;
Kaufman, AJ .
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2003, 115 (08) :916-932