Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China

Zhao, Yuanlong; Yuan, Junhua; Babcock, Loren E.; Guo, Qingjun; Jin, Peng; Yin, Leiming; Yang, Xing; Peng, Shanchi; Wang, Chun‐Jiang; Gaines, Robert R.; Esteve, Jorge; Tai, Tongsu; Yang, Ruidong; Wang, Yue; Sun, Haijing; Yang, Yibo

doi:10.18814/epiiugs/2019/019013

Cited by 59 publications

(59 citation statements)

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“…(, b), with emendation following a recent GSSP decision (see Zhao et al . ) by the International Commission on Stratigraphy and the International Union of Geological Sciences. Zhao et al .…”

Section: Methodsmentioning

confidence: 99%

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The bivalved arthropod Tuzoia from the Balang Formation (Cambrian Stage 4) of Guizhou, China, and new observations on comparative species

Wen

Babcock

Jin

et al. 2019

Papers in Palaeontology

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Tuzoia is a large, bivalved Cambrian arthropod having a widespread distribution in shallow-shelf to deeper marine Lagerst€ atten; stratigraphically it ranges from Cambrian Series 2 through the Miaolingian Series. In the present study, three species are recognized from relatively deep-water deposits of the Balang Formation (Cambrian Stage 4) of Guizhou, South China: Tuzoia sinensis Pan, 1957, T. bispinosa Yuan et Zhao, 1999 and T. lazizhaiensis sp. nov. The new species is unique in having 6-10 small marginal spines on the dorsal margin, an inflated anterior margin with three short, closely spaced marginal spines. These remains, which usually occur as disarticulated valves, are inferred to be parautochthonous. One new specimen of T. lazizhaiensis shows a stalked eye and antenna. New Tuzoia material from the Kaili Biota (Cambrian: Wuliuan Stage) of Guizhou, and from the Guanshan Biota (Cambrian Stage 4) of Yunnan, China, provide additional comparative information about the genus. Some new specimens of T. bispinosa from the Kaili Biota provide information on valve morphology and palaeoecology. One specimen of T. sinensis from the Guanshan Biota provides information on the appendages, and one specimen of T. tylodesa, from the Guanshan Biota adds provides information on the trunk and appendages.

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Section: Methodsmentioning

confidence: 99%

“…Zhao et al . () proposed the chronostratigraphic name Miaolingian Series to replace the provisional name Cambrian Series 3, and the name Wuliuan Stage to replace the provisional name Cambrian Stage 5. Those new names have been ratified by the International Union of Geological Sciences (Cohen et al .…”

Section: Methodsmentioning

confidence: 99%

The bivalved arthropod Tuzoia from the Balang Formation (Cambrian Stage 4) of Guizhou, China, and new observations on comparative species

Wen

Babcock

Jin

et al. 2019

Papers in Palaeontology

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“…These findings suggest that, in compacted material, the presence and/or depth of some transverse or longitudinal glabellar furrows should be considered more reliable for taxonomic identification than the presence and/or depth of others. Zhao et al (2008) and Esteve et al (2017Esteve et al ( , 2018 asserted that Oryctocephalus reticulatus (Lermontova, 1940;see Sundberg et al, 2011) and Oryctocephalus americanus Sundberg and McCollum, 2003b are synonymous with Oryctocephalus indicus, which is the index fossil for the Wuliuan Stage, Miaolingian Series (Zhao et al, 2019). All three species are very similar in cranidial shape (see Esteve et al, 2017) but differ in the number of transglabellar furrows, with only one furrow in O. reticulatus and O. americanus and three in O. indicus.…”

Section: Interpretation and Discussionmentioning

confidence: 99%

“…Oryctocephalid trilobites play a major role in intercontinental biostratigraphic correlation in Stage 4 and the succeeding Wuliuan Stage of the Cambrian (Sundberg et al, 2016;Zhao et al, 2019;Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Nature and significance of intraspecific variation in the early Cambrian oryctocephalid trilobiteOryctocephalites palmeriSundberg and McCollum, 1997

Webster

Sundberg

2019

J. Paleontol.

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Oryctocephalid trilobites are seldom abundant and often tectonically deformed, creating problems for robust species delimitation and compromising their utility in biostratigraphic and evolutionary studies. By studying more than 140 specimens recovered from the upper portion of the Combined Metals Member (Pioche Formation, Nevada; Cambrian Stage 4, Series 2), we exploit a rare opportunity to explore how morphological variation among oryctocephalid specimens is partitioned into intraspecific variation versus interspecific disparity. Qualitative and quantitative analyses reveal that two species are represented: Oryctocephalites palmeri Sundberg and McCollum, 1997 and Oryctocephalites sp. A, the latter known from a single cranidium stratigraphically below all occurrences of the former. In contrast to the conclusions of a previous study, there is no evidence of cranidial dimorphism in O. palmeri. However, that species exhibits considerable variation in cranidial shape and pygidial spine arrangement and number. Cranidial shape variation within O. palmeri is approximately one-half of the among-species disparity within the genus. Comparison of cranidial shape between noncompacted and compacted samples reveals that compaction causes significant change in mean shape and an increase in shape variation; such changes are interpretable in terms of observed fracture patterns. Nontaphonomic variation is partitioned into ontogenetic and nonallometric components. Those components share similar structure with each other and with interspecific disparity, suggesting that ontogenetic shape change might be an important source of variation available for selection. This highlights the importance of ontogenetic and taphonomic sources of variation with respect to species delimitation, morphospace occupation, and investigation of evolutionary patterns and processes.

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“…Faunas of the lower Lakeview Limestone range from the Ptychagnostus praecurrens to Bolaspidella zones ( Fig. 3), which are assigned to the international Wuliuan and Drumian stages, Miaolingian Series and the Laurentian Lincolnian Series, Delamaran to Marjuman stages of the Cambrian (Babcock et al, 2007;Zhao et al, 2019). These assignments are based on the taxa reported in Motzer (1980) that have been cited by Bush (1989Bush ( , 1991Bush and Fischer, 1981;Bush et al, 2012), and on the results presented here.…”

Section: Biostratigraphymentioning

confidence: 99%

Trilobite fauna (Wuliuan Stage, Miaolingian Series, Cambrian) of the lower Lakeview Limestone, Pend Oreille Lake, Idaho

Sundberg

2020

J. Paleontol.

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The Lakeview Limestone is one of the westernmost Cambrian exposures in the northwestern United States and occurs on the western edge of the Montania paleotopographic high. These deposits occur between the deeper water deposits to the west and carbonate banks and intracratonic basins to the east and provide critical link between the regions. A re-investigation of the Cambrian trilobite faunas from the lower portion of the Lakeview Limestone, Pend Oreille Lake, Idaho, is undertaken due to the inadequate illustrations and descriptions provided by Resser (1938a). Resser's type specimens and additional material are figured and described. The trilobite assemblages represent the Ptychagnostus praecurrens Zone, Wuliuan Stage, Miaolingian Series and including two new taxa: Itagnostus idahoensis n. sp., and Utia debra n. sp. Because of the similarity between some species of Amecephalus from the Lakeview Limestone to specimens from the Chisholm Shale, Nevada, the type specimens of Amecephalus piochensis (Walcott, 1886) and Am. packi (Resser, 1935), Walcott's and Resser's type specimens are re-illustrate and their taxonomic problems are discussed. Utia curio Walcott, 1924 from the Spence Shale, Utah, have never been re-illustrated since Walcott (1925), these type specimens are also re-illustrated and compared to Utia debra n. sp.UUID: http://zoobank.org/5ef6ee5e-bddc-4395-becf-9bcea54c679c

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Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China

Abstract: Laurentia, the Oryctocephalus indicus Zone in the Indian Himalaya and North Greenland, near the base of the Delamaran Stage in Australia, and within the Eccaparadocides sdzuyi Zone in Iberia and the Ornamentaspis frequens Zone in Morocco.

Cited by 59 publications

References 54 publications

The bivalved arthropod Tuzoia from the Balang Formation (Cambrian Stage 4) of Guizhou, China, and new observations on comparative species

The bivalved arthropod Tuzoia from the Balang Formation (Cambrian Stage 4) of Guizhou, China, and new observations on comparative species

Nature and significance of intraspecific variation in the early Cambrian oryctocephalid trilobiteOryctocephalites palmeriSundberg and McCollum, 1997

Trilobite fauna (Wuliuan Stage, Miaolingian Series, Cambrian) of the lower Lakeview Limestone, Pend Oreille Lake, Idaho

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