A new, previously undescribed Middle Ordovician (middle Darriwilian: Dw2) radiolarian assemblage has been recovered from the Table Cove Formation at Piccadilly Quarry, western Newfoundland. Constituents of the fauna described herein are both distinctive and exceptionally well preserved. Three-dimensional X-ray micro-computed tomography (μ-CT) is used to make a detailed examination of four key spumellarian specimens. This technology enables visualization of hitherto ambiguous details of the internal morphologies of key lower Paleozoic taxonomic groups, among which a lack of knowledge has impeded resolution of higher taxonomic rankings.

中文翻译：

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加拿大纽芬兰西部的中奥陶世粉蚧（放射虫）的显微 CT 研究

在纽芬兰西部皮卡迪利采石场的 Table Cove 组中发现了一个新的、以前未被描述的中奥陶世（中达里维利安：Dw2）放射虫组合。这里描述的动物群的组成部分既独特又保存得非常完好。三维 X 射线微计算机断层扫描 (μ-CT) 用于对四个关键的 spumellarian 标本进行详细检查。该技术能够可视化关键低古生代分类群的内部形态的迄今为止不明确的细节，其中缺乏知识阻碍了更高分类排名的解决。