[关键词]
[摘要]
首次报道贵州剑河八郎地区寒武系甲劳组下部粉砂质、砂质页岩中的太阳女神螺类化石小厄兰岛螺属(Oelandiella Vostokova，1962)1相似种：Oelandiellacf．accordinonata(Runnegar and Jell，1976)emended Yang et al．，2012。剑河甲劳组 Oelandiella可见较为显著横过背脊并在壳体两侧对称的同缘褶，推测其可能是在正常浅海环境中形成，因此，该化石的发现和研究将有助于了解甲劳组的沉积环境，为深入探讨其沉积环境提供新的证据。同时，确认寒武系第三统台江阶的甲劳组是 Oelandiella在黔东地区的最高产出层位，为研究寒武纪太阳女神螺类软体动物的分类、演化等提供更多的化石材料。
[Key word]
[Abstract]
Oelandiella was first reported in the Jialao Formation at Balang village, Jianhe County,Guizhou Province,including 1 species Oelandiella cf.accordinonata(Runnegar and Jell,1976)emended Yang et al.,2012.Oelandiella was found in the Jialao Formation with symmetrical comarginal ribs crossing the dorsum suggesting it may form in normal shallow-water environment.This study confirms Oelandiellain the Jialao Formation is the highest layer in the Cambrian of the southeast part of Guizhou and provides material for taxonomy and early radiation of Cambrian helcionelloids.
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[基金项目]
国家自然科学基金(41362002)；国家重点基础研究发展规划项目(2013CB835002，2015FY310100)；现代古生物学和地层学国家重点实验室基金(153113)；贵州省古生物研究中心建设基金(黔科合 Z字[2014]4003号)联合资助
