New, distinctive, well-preserved and previously undescribed constituents of a Middle Ordovician (middle Darriwilian, Dw2) radiolarian assemblage from the Table Cove Formation in Newfoundland are described. Three-dimensional X-ray micro-computed tomography (μ-CT) facilitates detailed examination of key specimens revealing hitherto unknown details of the internal morphologies of key lower Paleozoic taxonomic groups, among which a lack of knowledge has previously impeded resolution of higher taxonomic rankings.Twenty-seven archaeospiculid and entactinarian taxa are described and illustrated including six new species: Westernbrookia polygonata n. sp., Neopalaeospiculum piccadilliensis n. sp., Ramuspiculum laxum n. sp. Spongentactinia nazarovi n. sp., Aspiculum irregulare n. sp., and Nyfrieslandia ramosissima n. sp. The investigation extends the known ranges of the species: Pararcheoentactinia reedae Won and Iams, 2002; Sphaeroentactinia robusta Won and Iams, 2015; Varispiculum ectospiculatum Won and Iams, 2015; and Svalbardospiculum multifurcatum (Won, Iams, and Reed, 2005), together with the genus Echidnina to the mid-Darriwilian.UUID: http://zoobank.org/74826b7b-bb86-45d5-ad23-e6e65e0706df.

中文翻译：

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来自加拿大纽芬兰皮卡迪利采石场 Table Cove 组的中奥陶世（中达里维利安）Archaeospicularia 和 Entactinaria（放射虫）

描述了来自纽芬兰 Table Cove 组的中奥陶纪（中 Darriwilian，Dw2）放射虫组合的新的、独特的、保存完好的和以前未描述的成分。三维 X 射线微计算机断层扫描 (μ-CT) 有助于对关键标本进行详细检查，揭示关键低古生代分类群内部形态的未知细节，其中缺乏知识以前阻碍了更高分类等级的解析. 描述和说明了 27 个古蛛科和昆虫类群，包括 6 个新物种：紫檀n. sp.,Neopalaeospiculum piccadilliensisn. sp.,松枝n. sp。海绵体n. sp.,不规则针叶n. sp.，和Nyfrieslandia ramosissiman. sp。调查扩大了该物种的已知范围：Pararcheoentactinia reedaeWon 和 Iams，2002 年；圆球菌Won 和 Iams，2015 年；外穗花蕈Won 和 Iams，2015 年；和Svalbardospiculum multifurcatum(Won, Iams, and Reed, 2005)，连同属针鼹到 Darriwilian.UUID 中期：http://zoobank.org/74826b7b-bb86-45d5-ad23-e6e65e0706df.