We studied species of Leucoagaricus and Leucocoprinus collected in the Dominican Republic over the past 10 years using morphological and molecular methods and carefully compared our collections with previously described neotropical taxa. Twelve new species, eight in Leucoagaricus (La. bulbiger, La. caeruleovertens, La. margaritifer, La. pegleri, La. roseovertens, La. silvestris, La. stillatus, La. turgipes) and four in Leucocoprinus (Lc. antillarum, Lc. fuligineopunctatus, Lc. microlepis, Lc. scissus) are described. Additional records of previously described taxa are also discussed, including the first molecularly annotated occurrences of Lepiota guatopoensis, Lepiota mucrocystis, and La. rubroconfusus in their putative natural habitats and of Lc. cretaceus in the neotropics. Lepiota guatopoensis and Lepiota mucrocystis are transferred here to Leucoagaricus based on their phylogenetic placement and morphological characteristics. Color photographs of fresh basidiocarps and line drawings of microscopic characters are provided for all species.

中文翻译：

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多米尼加共和国的 Leucoagaricus 和 Leucocoprinus 属

我们使用形态学和分子方法研究了过去 10 年在多米尼加共和国收集的 Leucoagaricus 和 Leucocoprinus 物种，并仔细比较了我们的收藏品与先前描述的新热带分类群。12 个新物种，8 个在 Leucoagaricus (La.bulbiger, La. caeruleovertens, La. margaritifer, La. pegleri, La. roseovertens, La. silvestris, La.stillatus, La. turgipes) 和四个 Leucocoprinus (Lc. antillarum, Lc . fuligineopunctatus, Lc. microlepis, Lc. scissus) 进行了描述。还讨论了先前描述的分类群的其他记录，包括在其假定的自然栖息地和 Lc 中首次分子注释的 Lepiota guatopoensis、Lepiota mucrocystis 和 La. rubroconfusus。白垩纪在新热带地区。Lepiota guatopoensis 和 Lepiota mucrocystis 根据它们的系统发育位置和形态特征被转移到 Leucoagaricus。提供所有物种的新鲜担子果的彩色照片和微观特征的线条图。