Abstract Palynological investigation carried on the samples from the Unit 1 of the Sappington Formation (Upper Famennian, Montana, USA) reveals a presence of rich phytoplankton and microflora assemblages. The presence of spheroidal vesicles approx. 20 μm in diameter having a rigid smooth wall and frequently arranged in clusters connected by an external coating are proposed as a new taxon named Involusphaeridium gutschicki gen. et sp. nov. The coating on individual vesicles and colonies of I. gutschicki gen. et sp. nov. suggests a link with algal or fungal groups but also, with the eggs of arthropods. Hence, it is considered as incertae sedis (acritarch group).

中文翻译：

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新殖民者 Involusphaeridium gutschicki gen。等。十一月 来自美国蒙大拿州西部的下萨平顿组（上法门阶）

摘要 对来自 Sappington 组（美国蒙大拿州上法门尼亚）的 Unit 1 的样品进行孢粉学调查显示存在丰富的浮游植物和微生物群落。球状囊泡的存在约。直径为 20 μm 的具有刚性光滑壁且经常排列成簇并通过外部涂层连接的新分类群被提议作为名为 Involusphaeridium gutsicki gen 的新分类群。等 sp. 十一月 I.gutschicki gen 的单个囊泡和菌落上的涂层。等 sp. 十一月 暗示与藻类或真菌群以及节肢动物的卵有联系。因此，它被认为是 incertae sedis（acritarch 组）。