Based on the analysis of both historical and recent collections, this paper reports an annotated list of taxa which are new to the lichen biota of Italy or of its administrative regions. Specimens were identified using a dissecting and a compound microscope; routine chemical spot tests and standardized thin-layer chromatography (TLC or HPTLC). The list includes 225 records of 153 taxa. Twenty taxa are new to Italy, the others are new to one or more administrative regions, with 15 second records and 5 third records for Italy. Some of the species belong to recently-described taxa, others are poorly known, sterile or ephemeral lichens which were largely overlooked in Italy. Several species are actually rare, either because of the rarity of their habitats (e.g. old-growth forests), or because in Italy they are at the margins of their bioclimatic distribution. The picture of the lichen biota of Italy has now new pixels, but its grain is still coarse. Further analysis of historical collections, increased efforts in the exploration of some areas, and the taxonomic revision of critical groups are still necessary to provide more complete distributional data for new biogeographic hypotheses, taxonomic and ecological research, and biodiversity conservation.

中文翻译：

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完善图片：意大利地衣生物群的新记录

基于对历史和近期收藏的分析，本文报告了意大利或其行政区域地衣生物群的新分类群的注释列表。使用解剖显微镜和复合显微镜鉴定标本；常规化学点检和标准化薄层色谱法（TLC 或 HPTLC）。该列表包括 153 个分类群的 225 条记录。20个分类群是意大利的新分类群，其他是一个或多个行政区域的新分类群，意大利有15个第二记录和5个第三记录。一些物种属于最近描述的分类群，其他物种是鲜为人知的、不育的或短暂的地衣，这些在意大利很大程度上被忽视了。有几个物种实际上很少见，要么是因为它们的栖息地稀有（例如古老的森林），或者因为在意大利，它们处于生物气候分布的边缘。意大利地衣生物群的图片现在有了新的像素，但它的颗粒仍然很粗糙。对历史收藏品的进一步分析、部分地区探索力度的加大以及关键群体的分类学修订，仍需要为新的生物地理学假说、分类学和生态学研究以及生物多样性保护提供更完整的分布数据。