In this study, we isolated and identified oomycete species of the genus Saprolegnia. Saprolegnia atlantica, a new species isolated from soil and freshwater bodies in areas of the Atlantic Rainforest (São Paulo state, Brazil), is described herein based on morphology and phylogenetic analyses of combined ITS and LSU regions of the nuclear ribosomal DNA (nc rDNA). Taking into account the oospore type and/or the presence of terminal oogonia with androgynous antheridia, this new species appears to be related to S. litoralis and S. terrestris, but the phylogenetic placement of the isolates did not corroborate this relationship. Saprolegnia aenigmatica, S. blelhamensis, S. glomerata, and S. milanezii were also identified in the soil and submerged leaves, surface sediment, and/or water samples from freshwater bodies collected for the study. These specimens were sequenced, included in phylogenetic analyses, and described, commented and/or illustrated. Saprolegnia glomerata is a first report for Brazil, first sequences of S. blelhamensis and S. glomerata were deposited in GenBank, and Brazilian isolates of S. blelhamensis and S. glomerata are designated as epitypes. Our phylogenetic analyses of the Saprolegnia clade and previously published studies suggest that S. bulbosa, S. longicaulis, S. oliviae, and S. maragheica are new synonyms of S. ferax, and S. semihypogyna is a new synonym of S. eccentrica.

在这项研究中，我们分离并鉴定了水霉属的卵菌。大西洋水霉是一种从大西洋雨林（巴西圣保罗州）地区的土壤和淡水体中分离出来的新物种，本文基于对核核糖体 DNA (nc rDNA) 的 ITS 和 LSU 组合区域的形态学和系统发育分析进行了描述. 考虑到卵孢子类型和/或末端卵原细胞的存在和雌雄同体的花药，这个新物种似乎与S . litoralis和S . terrestris，但分离株的系统发育位置并未证实这种关系。水霉年代。布莱汉姆_ _ _ 肾小球和S . 在为研究收集的淡水体的土壤和沉水叶片、表层沉积物和/或水样中也发现了milanezii 。这些标本被测序，包括在系统发育分析中，并描述、评论和/或说明。Saprolegnia glomerata是巴西的第一份报告，是S的第一个序列。blehamensis和S . glomerata被存放在 GenBank 中，而巴西的S . blehamensis和S .肾小球被指定为表型。我们对水霉属进化枝的系统发育分析和先前发表的研究表明，S . 球茎, S. _ 长茎, S . 奥利维亚和S。 _ maragheica是S的新同义词。费拉克斯和S。 _ semihypogyna是S的新同义词。古怪的。