Buaya Anthony T, Scholz Bettina, Thines Marco
Senckenberg Biodiversity and Climate Research Center, Frankfurt am Main, Germany.
BioPol ehf, Marine Biotechnology, Skagaströnd, Iceland.
Mycobiology. 2021 Aug 16;49(4):355-362. doi: 10.1080/12298093.2021.1952813. eCollection 2021.
Obligate endoparasitic oomycetes are known to ubiquitously occur in marine and freshwater diatoms, but their diversity is still largely unexplored. Many of these parasitoids are members of the early-diverging oomycete lineages (, ), others are within the of the (, ) and some have been described in the (, ). Even though some species have been recently described and two new genera were introduced ( and ), the phylogeny and taxonomy of most of these organisms remain unresolved. This is contrasted by the high number of sequences from unclassified species, as recently revealed from environmental sequencing, suggesting the presence of several undiscovered species. In this study, a new species of is reported from a marine centric diatom ( sp.) isolated from Skagaströnd harbor in Northwest Iceland. The morphology and life cycle traits of this novel oomycete parasite are described herein, and its taxonomic placement within the genus is confirmed by molecular phylogeny. As it cannot be assigned to any previously described species, it is introduced as in this study. The genus thus contains three described holocarpic species (, , ) to which likely additional species will need to be added in the future, considering the presence of several lineages known only from environmental sequencing that clustered within the clade.
专性内寄生卵菌普遍存在于海洋和淡水硅藻中，但它们的多样性在很大程度上仍未得到充分探索。这些寄生生物中的许多是早期分化的卵菌谱系成员（ ， ），其他的则属于 的 （ ， ），还有一些已在 （ ， ）中被描述。尽管最近描述了一些物种并引入了两个新属（ 和 ），但这些生物中大多数的系统发育和分类仍未解决。与之形成对比的是，如最近环境测序所揭示的，来自未分类物种的序列数量众多，这表明存在几个未被发现的物种。在本研究中，从冰岛西北部斯卡加斯特伦港分离的一种海洋中心硅藻（ 种）中报道了一种新的 物种。本文描述了这种新型卵菌寄生虫的形态和生命周期特征，并通过分子系统发育确定了其在 属中的分类位置。由于它不能被归为任何先前描述的物种，因此在本研究中被命名为 。考虑到仅从环境测序中得知的几个谱系聚集在 分支内， 属因此包含三个已描述的全果型物种（ ， ， ），未来可能还需要添加更多物种。
