摘要
贵州剑河寒武纪凯里生物群的高肌虫风雅峨眉虫(相似种)Emeiella cf.venusta和峨眉虫(未定种)Emeiellasp.化石,曾被描述为梁山虫(未定种)Liangshanellasp.,作者认为这些化石发育有细长的背脊,不符合Liangshanella的属征,厘定为峨眉虫Emeiella Lee,1975的1个相似种和1个未定种。相似种以具半圆形的壳、细长而平直的背脊且与背边平行的特点,区别于峨眉虫属的其它种;未定种壳受压扁长,呈半椭圆形,背脊细而长,暂作未定种处理。凯里生物群中Emeiella的产出,不仅增加了该属新的种群、地理分布由扬子区扩大至扬子-江南之间的过渡区、时代从寒武纪第二世延伸至苗岭世,也为寒武纪高肌虫的分类、地理分布、演化研究提供了新的材料。
This study mainly focuses on Emeiella cf. uenusta and Erneiella sp. , which were once described as Liangshanella sp. of bradoriid fossils, recovered from the Cambrian Kaili Biota in eastern Guizhou, South China. We allow a reassignment of the material from Lianshanella Huo, 1956 to Emeiella cf. venusta and Emeiella sp. Current features observed in the Kaili material distinguish Emeiella cf. venusta from Liangshanella by the well-developed, narrow dorsal ridge. A semicircutar valve, ridge and parallel to the dorsal edge of Emeiella cf. venusta, which is distinguished obviously from other species of Emeiella. The valve of EmeieNa sp. is compressed and oblong, showing a semi- elliptic shape, the back ridge is thin and long. The discovery of Emeiella from Kaili Formation has expanded geographical distribution and age extension of the genus, and enriched the arthropod species of the Kaili Biota. The result contributes to the classification and species evolution of the arthropod hradoriid.
作者
杨光福
赵元龙
许留恩
赵小云
YANG Guang-fu;ZHAO Yuan-long;XU Liu-en;ZHAO Xiao-yun(College of Resource and Environment Engineering,Guizhou University,Guiyang 550025,China,zhaoyuanlong@ 126.com)
出处
《古生物学报》
CSCD
北大核心
2018年第3期321-328,共8页
Acta Palaeontologica Sinica
基金
国家重点基础研究规划项目(2015FY310100)
中国地质调查局调查项目(DD20160120-04)
国家自然科学基金(41772021
41662001
41702022)联合资助
