摘要
对陕南西乡化石库发现的马哈螺类化石和棱管壳类化石做了统计和描述,补充了马哈螺类新的属征,建立新种西乡拟鳞锥Ramentoides xixiangensis sp. nov.。马哈螺和棱管壳表面装饰存在差异,并非同一物种上掉落的骨片,本文展示的马哈螺新的特征与"骨针壳"假说存在矛盾,马哈螺在形态上表现出软体动物单板类最原始的特征,而棱管壳则与halkieriids存在密切的亲缘关系。本文报道了马哈螺类化石的新形态,丰富了对马哈螺类和棱管壳类的认识,对确立马哈螺和棱管壳的亲缘关系和分类位置提供了新的材料。
The fossils of maikhanellid and siphogonuchitids found in the Cambrian Xixiang Lagerst?tten in South Shaanxi Province,China were statistically described,and the new characteristics of maikhanellid genera was added.A new species Ramentoides xixiangensis sp.nov.is described in this paper.The surface decoration of maikhanellid and siphogonuchitids is different and they are not the fallen bone slices from the same species.The new characteristics of maikhanellid are contradictory to the'spicule-shell'hypothesis.The maikhanellid exhibits the most primitive characteristics of molluscs in morphology,while the siphogonuchitids has close affinity with halkieriids.This paper reports the new morphology of maikhanellid,enriches the knowledge of maikhanellid and siphogonuchitids,and provides new material for establishing the relationship and systematic position of maikhanellid and siphogonuchitids.
作者
秦嘉琛
刘云焕
刘明金
张虎
张亚楠
王琪
邵铁全
吴谐婷
高振丽
张响
QIN Jiachen;LIU Yunhuan;LIU Mingjin;ZHANG Hu;ZHANG Yanan;WANG Qi;SHAO Tiequan;WU Xieting;GAO Zhenli;ZHANG Xiang(Earth Science Faculty,Chang’an University,Xi’an 710054;State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008;Shaanxi Key Laboratory of Early Life and Environments(Northwest University),Xi’an 710069)
出处
《微体古生物学报》
CSCD
北大核心
2019年第1期30-44,共15页
Acta Micropalaeontologica Sinica
基金
国家自然基金(No.41872014
No.41572009
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.201810710066
No.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~~
关键词
马哈螺
棱管壳
单板纲
西乡化石库
寒武纪
陕南
maikhanellids
siphogonuchitids
Monoplacophora
Xixiang Lagerstatten
Cambrian
South Shaanxi
China
