摘要
和凯里生物群一样,贵州寒武系杷榔动物群也含有丰富的棘皮动物始海百合化石,包括两个属种即俞氏贵州始海百合Guizhoueocrinus yui Zhao,Parsley et Peng,2007及殷氏原始球状始海百合(新属新种)Protogloboeocrinus yini(gen.et sp.nov.).其中新属种是近期在杷榔组分布区南部贵州麻江下司淑里村杷榔组上部发现的,是凯里组中球形球状始海百合(Globoeocrinus globolus Zhao,Parsley et Peng,2008)的原始属种,两者均具有发育的吸盘、长的茎、近于球形或椭球形的萼及较长的腕.但新属种茎呈倒长锥柱形,缝孔长卵形,腕枝数少,两者区别明显.Protogloboeocrinus yini(gen.et sp.nov.)的发现及研究,不仅追溯到凯里组球形球状始海百合的原始属种,了解两者演化规律是茎变短,萼变球形,缝孔变为圆形,腕枝数量增加,捕食能力增强.而且还增添了杷榔组始海百合的多样性及其分区性:杷榔组分布区北部仅见Guizhouocrinus yui,南部仅见Protogloboeocrinus yini(gen.et sp.nov.).
Like Kaili Biota,Balang Fauna in Cambrian also contains abundant eocrinoids fossils including two genera and species,which are Guizhoueocrinus yui Zhao,Parsley et Peng,2007 and Protogloboeocrinus yini（gen.et sp.nov.）.New genus and species described occur in the upper part of Balang Formation at Shuli Village,Xiasi Town,Majiang County,Guizhou Province,which is located in the southern part of the Balang Formation distribution area.Protogloboeocrinus yini（gen.et sp.nov.）is a primitive genus and species of Globoeocrinus globolus Zhao,Parsley et Peng,2008 from the Kaili Formation.Both have developed osculum,nearly spherical or spheroidal theca,long brachioles,but new genus and species differ from the latter in having long inverted conical column stalk,nearly spherical or ellipsoidal theca,long oval sutural pore and less bronchioles.The discovery and study of Protogloboeocrinus yini（gen.et sp.nov.）reviews primitive genus and species of Globoeocrinus globolus and provides evidences for evolutional trend between the two in genera and species such as stalk shortening,long inverted conical column changing to short inverted conical column,theca changing global in shape,sutural pore changing from long oval form to round form,more brachioles in number.In addition,the biological diversity of eocrinoids from Balang For-mation is enriched and biological partition of eocrinoids from Balang Formation is enhanced.The Guizhoueocrinus yui only occur in the northern part of the distribution area of Balang Formation and Protogloboeocrinus yini（gen.et sp.nov.）only occur in the southern part of the distribution area of Balang Formation.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2015年第2期249-260,共12页
Earth Science-Journal of China University of Geosciences
基金
国家重点基础研究发展规划"973"项目(No.20BCB835002)
国家自然科学基金项目(Nos.41330101
41172005)
全国地层委员会基金
贵州省省长基金项目(黔省专合字[2011]39号)
贵州省科技基金项目(黔科合J字[2012]2018)
