A wide variety of scalidophoran worms have been found in the Cambrian Fortunian in recent years,suggesting that scalidophorans diversified during this age.Here,we report new scalidophoran material obtained from the 2n...A wide variety of scalidophoran worms have been found in the Cambrian Fortunian in recent years,suggesting that scalidophorans diversified during this age.Here,we report new scalidophoran material obtained from the 2nd member of the Kuanchuanpu Formation(Fortunian Stage)in Zhangjiagou Lagerst?tte,Xixiang County,Shaanxi Province,South China.Three indeterminate forms of scalidophoran worms are described in detail.The morphology of these worms differs from that of any coeval worms and may represent new taxa.However,because these fossils are fragmented and lack detailed information on the arrangement pattern of introvert scalids,they are named here in open nomenclature.This study enriches the diversity of the earliest scalidophorans to 7 genera and species and 10 indeterminate forms.Based on the new fossils,Fortunian scalidophoran worms can be divided into three categories:(1)worms with microannuli;(2)worms with macroannuli;and(3)worms without annuli.展开更多
Objective The Cambrian fossil embryos of radial animals are represented by taxa of Olivooides,Pseudooides,Carinachites,hexangulaconulariids(including Hexaconularia and Arthrochites)and Quadrapyrgites.Liu Yunhuan estab...Objective The Cambrian fossil embryos of radial animals are represented by taxa of Olivooides,Pseudooides,Carinachites,hexangulaconulariids(including Hexaconularia and Arthrochites)and Quadrapyrgites.Liu Yunhuan established a new genus:Qinscyphus Liu 2017 and reconstructed the general morphology of its hatched stages in 2017;this genus has only one species Qinscyphus necopinus.It was interpreted to be a member of Olivooidae Steiner 2014,and was placed besides crown-group Coronatae within Scyphozoa.In 2018,with the discovery of new fragmentary specimens with oral part preserved,the general morphology of Q.necopimus have been revised;and at the same time,we found a embryo assignable to Q.necopimus.This embryo has oral part that similar to that of the hatched stages of Q.necopimus,indicating that Q.necopinus underwent direet development.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.41872014,41572009)the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB26000000)+1 种基金the State Key Laboratory of Paleobiology and Stratigraphy,Nanjing Institute of Geology and Paleontology,the Chinese Academy of Sciences(Grant No.193123)the Basic Research Plan of Natural Science of Shaanxi Province(Grant No.2018JM4002)。
文摘A wide variety of scalidophoran worms have been found in the Cambrian Fortunian in recent years,suggesting that scalidophorans diversified during this age.Here,we report new scalidophoran material obtained from the 2nd member of the Kuanchuanpu Formation(Fortunian Stage)in Zhangjiagou Lagerst?tte,Xixiang County,Shaanxi Province,South China.Three indeterminate forms of scalidophoran worms are described in detail.The morphology of these worms differs from that of any coeval worms and may represent new taxa.However,because these fossils are fragmented and lack detailed information on the arrangement pattern of introvert scalids,they are named here in open nomenclature.This study enriches the diversity of the earliest scalidophorans to 7 genera and species and 10 indeterminate forms.Based on the new fossils,Fortunian scalidophoran worms can be divided into three categories:(1)worms with microannuli;(2)worms with macroannuli;and(3)worms without annuli.
基金supported by the National Natural Science Foundation of China(grant numbers 41872014,41572009 and 41572007)the State Key Laboratory of Paleobiology and Stratigraphy,Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences(grant number 173121)+5 种基金the Basic Research Plan of Natural Science of Shaanxi Province(grant number 2018JM4002)the Off-campus Educational Practice Base(grant number 300104282716)the Quality Project of Chang’an University(grant numbers 0012-310600161000 and 0012-310627171808)the Quality Project of Chang’an University(grant number 201810710066,201810710068 and 201810710235)the 11th“Challenge Cup”competition of Chang’an University(grant number D-P-B-5 and C-P-B-19)the Graduate Student Scientific Research Innovation Projects of Chang’an University(grant number 2018001)。
文摘Objective The Cambrian fossil embryos of radial animals are represented by taxa of Olivooides,Pseudooides,Carinachites,hexangulaconulariids(including Hexaconularia and Arthrochites)and Quadrapyrgites.Liu Yunhuan established a new genus:Qinscyphus Liu 2017 and reconstructed the general morphology of its hatched stages in 2017;this genus has only one species Qinscyphus necopinus.It was interpreted to be a member of Olivooidae Steiner 2014,and was placed besides crown-group Coronatae within Scyphozoa.In 2018,with the discovery of new fragmentary specimens with oral part preserved,the general morphology of Q.necopimus have been revised;and at the same time,we found a embryo assignable to Q.necopimus.This embryo has oral part that similar to that of the hatched stages of Q.necopimus,indicating that Q.necopinus underwent direet development.
基金国家自然基金(No.41872014No.41572009+6 种基金No.41572007)中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室(No.173121)陕西省自然科学基础研究计划(2018JM4002)长安大学研究生科研实践项目(No.2018001)长安大学大创项目(No.201810710066No.201810710068 and No.201810710235)长安大学第十一届"挑战杯"竞赛(No.【math40z】and No.【math41z】联合资助~~
