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A New Species of Septuconularia(hexangulaconulariidae,Cnidaria)from Cambrian Stage 2,South China

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Acta Geologica Sinica(English Edition) 2022年第3期96卷 757-765页

作者： SONG Zuchen GUO Junfeng hAN Jian heyo van iten QIANG Yaqin PENG Jiaxin SUN Jie ZhANG Zhifei Key Laboratory of Western Mineral Resources and Geological Engineering Ministry of EducationSchool of Earth Science and ResourcesChang’an UniversityXi’an 710054China Shaanxi Key Laboratory of Early Life and Environments Department of GeologyNorthwest UniversityXi’an 710069China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China Department of Geology Hanover CollegeHanoverIndiana 47243USA Department of Invertebrate Paleontology Cincinnati Museum Center1301 Western AvenueCincinnatiOhio 45203USA

hexangulaconulariids,an extinct family of medusozoan small shelly fossils(SSFs),were a conspicuous component of early Cambrian,shallow marine platform communities in South *** herein is Septuconularia crassiformis *** Bed 5 of the Yanjiahe Formation(Cambrian Stage 2)in the Three Gorges area of hubei *** new species differs from the type and only other known species,***,in the shape of the abapical portion and in the degree of curvature of the adapertural *** anatomy of the apical portion of the new species is *** diagnosis of the genus Septuconularia is emended and the spatio-temporal distribution of hexangulaconulariids in South China is ***,***,with its slit-like aperture and very narrow transverse cross-section,may have been better adapted to the shallow platform environment than the broader ***,which appears to have been less common than the type species.

关键词： Septuconularia crassiformis hexangulaconulariids Cambrian Stage 2 Yanjiahe Formation South China

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The middle Cambrian Linyi Lagerst?tte from the North China Craton: a new window on Cambrian evolutionary fauna

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National Science Review 2022年第7期9卷 152-161页

作者： Zhixin Sun Fangchen Zhao han Zeng Cui Luo heyo van iten Maoyan Zhu State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontologyand Center for Excellence in Life and PalaeoenvironmentChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Department of Geology Hanover College Department of Invertebrate Paleontology Cincinnati Museum Center

The rapid appearance of major animal groups and complex marine communities during the Cambrian explosion is recorded in large part in Burgess Shale-type ***,the restricted temporal and spatial distribution of known lagerstatten continues to hinder the formation of a comprehensive perspective on Cambrian evolutionary *** we describe the Linyi Lagerstatte(ca.504 mya),a new Cambrian Miaolingian lagerstatte from the Zhangxia Formation in Shandong Province,North *** Linyi Lagerstatte contains a variety of well-preserved soft-bodied fossils,among which the non-trilobite arthropods,particularly the mollisoniids and radiodonts,are the most important *** new assemblage is remarkable for its excellent preservation of arthropod limbs,eyes and guts,as well as for its close similarity in taxonomic composition to Laurentian *** distinctive Linyi Lagerstatte holds great promise for providing additional insights into the morphological disparity,community structure and paleogeographic range of marine faunas during the middle Cambrian(Miaolingian).

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Dawn of complex animal food webs:A new predatory anthozoan(Cnidaria)from Cambrian

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The Innovation 2022年第1期3卷 83-90页

作者： Qiang Ou Degan Shu Zhifei Zhang Jian han heyo van iten Meirong Cheng Jie Sun Xiaoyong Yao Rong Wang Georg Mayer Early Life Evolution Laboratory State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesBeijing 100083China Department of Zoology University of KasselKassel 34132Germany Shaanxi Key Laboratory of Early Life and Environment State Key Laboratory of Continental DynamicsDepartment of GeologyNorthwest UniversityXi’an 710069China Department of Geology Hanover CollegeHanoverIN 47243USA Cincinnati Museum Center Department of Invertebrate Paleontology1301 Western AvenueCincinnatiOH 45203USA School of Earth Science and Resources Chang’an UniversityXi’an 710054China

Cnidarians diverged very early in animal evolution;therefore,investigations of the morphology and trophic levels of early fossil cnidarians may provide critical insights into the evolution of metazoans and the origin of modern marine food ***,there has been a lack of unambiguous anthozoan cnidarians from Ediacaran assemblages,and undoubted anthozoans from the Cambrian radiation of metazoans are very rare and lacking in ecological ***,we report a new polypoid cnidarian,Nailiana elegans *** ***.,represented by multiple solitary specimens from the early Cambrian Chengjiang biota(-520 Ma)of South *** specimens show eight unbranched tentacles surrounding a single opening into the gastric cavity,which may have born multiple ***,*** displays a level of organization similar to that of extant *** analyses place *** in the stem lineage of Anthozoa and suggest that the ancestral anthozoan was a soft-bodied,solitary polyp showing octoradial ***,one specimen of the new polyp preserves evidence of predation on an epifaunal lingulid *** case provides the oldest direct evidence of macrophagous predation,the advent of which may have triggered the emergence of complex trophic/ecological relationships in Cambrian marine communities and spurred the explosive radiation of animal body plans.

关键词： China Cambrian solitary

华中西南区一条国际前寒武系与寒武系界线层型补充剖面(英文)

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古生物学报 2002年第1期41卷 19-26页

作者：钱逸朱茂炎李国祥蒋志文 heyo van iten 中国科学院南京地质古生物研究所南京210008 云南省地矿局昆明650011 美国汉诺威学院地质系印第安纳47243

1992年 ,全球前寒武系与寒武系界线层型剖面和层型点确定在加拿大纽芬兰东南幸运角剖面 ,并以遗迹化石带Trichophycuspedium的底作为前寒武系与寒武系的分界点。但是 ,幸运角剖面主要是以硅质碎屑岩相为主 ,难以与含有丰富小壳化石和具... 详细信息

1992年 ,全球前寒武系与寒武系界线层型剖面和层型点确定在加拿大纽芬兰东南幸运角剖面 ,并以遗迹化石带Trichophycuspedium的底作为前寒武系与寒武系的分界点。但是 ,幸运角剖面主要是以硅质碎屑岩相为主 ,难以与含有丰富小壳化石和具有可对比的稳定同位素资料的碳酸盐相界线剖面进行对比。为此 ,提出我国云南会泽大海附近的一条以碳酸盐相为主的剖面作为全球前寒武系与寒武系界线层型剖面的补充剖面。理由是 (1)在大海剖面上 ,震旦系灯影组白岩哨段、待补段和下寒武统牛家菁组的中谊村段 ,大海段之间为整合接触 ;(2 )早寒武世早期地层单元含有丰富的小壳化石并且可划分出 4个小壳化石组合带 ;(3)利用碳同位素资料可以将大海剖面与许多其它剖面相当地层对比 ;(4 )著名的梅树村剖面离大海剖面不远 ,它们均含有丰富的小壳化石和遗迹化石 ,两者易于对比。文章进一步认为寒武系的下界放在第Ⅰ小壳化石组合带 (Anabaritestrisulcatus Protohertzinaanabarica)的底 ,相当于大海剖面

关键词：前寒武系寒武系界线补充层型云南省华中西南区化石组合带

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