Rock samples from four boreholes and three exposures located in the southern peripheries of the Holy Cross Mountains in Poland, from strata representing the lower Cambrian Czarna Shale Formation have been studied palynologically. A relatively numerous and well-preserved lowermost Cambrian microfloral assemblage corresponds to coeval associations known from different palaeocontinents. Our new data enables reinterpretation of the biostratigraphy of the Czarna Formation, a thick rock unit basically devoid of macrofossils. The rocks analysed represent the Terreneuvian and comparison with other lower Cambrian successions indicates the middle and upper part of this oldest Cambrian series. The discovery of Variosphaeridium gen. nov. supplements information about the diversity of lowermost Cambrian microfloral assemblages. The Fimbriaglomerella membranacea–Globosphaeridium cerinum Assemblage Zone is introduced; it has a transitional character between the Asteridium tornatum–Comasphaeridium velvetum and Skiagia ornata–Fimbriaglomerella membranacea assemblage zones distinguished by Moczydłowska (1991) and identified on most Cambrian palaeocontinents.

来自位于波兰圣十字山脉南部外围的四个钻孔和三个暴露点的岩石样本，来自代表下寒武统 Czarna 页岩组的地层，已经进行了孢粉学研究。相对众多且保存完好的最下层寒武纪微生物群落对应于不同古大陆已知的同期群落。我们的新数据能够重新解释 Czarna 组的生物地层学，这是一个基本上没有大型化石的厚岩单元。所分析的岩石代表了 Terreneuvian，与其他下寒武统序列的比较表明这个最古老的寒武纪系列的中上部。Variosphaeridium的发现将军 十一月 补充了有关最低寒武纪微生物群落多样性的信息。该Fimbriaglomerella membranacea - Globosphaeridium cerinum组合带介绍; 它在Asteridium tornatum – Comasphaeridium v​​elvetum和Skiagia ornata – Fimbriaglomerella membranacea组合区之间具有过渡特征，由 Moczydłowska (1991) 区分并在大多数寒武纪古大陆上确定。