网衣属3个中国新记录种

该研究以采集于中国新疆地区的网衣科网衣属地衣标本为试验材料，采用形态解剖学、地衣化学物质检测方法和系统发育学方法，观察分析网衣属地衣的形态解剖特征、次生代谢产物以及核糖体DNA内转录间隔区(internal transcribed spacer,ITS)系统发育树，依据形态解剖数据、次生代谢产物种类以及系统发育树分类地位更为综合的鉴定种。结果显示：(1)共鉴定出网衣科网衣属3个中国新记录种——暗色网衣(Lecidea fuscoatrina Hertel & Leuckert)、珠光网衣(Lecidea perlatolica Hertel & Leuckert)和多器网衣(Lecidea polypycnidophora U. Rupr. & Türk)，并提供了3个新记录的形态解剖图。(2)ITS系统发育树结果表明，暗色网衣与近缘种Lecidea atrobrunnea原种及亚种、Lecidea fuscoatra、珠光网衣与近缘种Lecidea promiscens以及Lecidea polypycnidophora与近缘种Lecidea andersonii各形成一个分支，依据分支组成可将形态差异不明显的近缘种鉴别开。

Three Lecidea Lichens New to China

In this paper, morphology,anatomy,lichen chemistry and molecular biology methods were selected to study the specimens of Lecidea from Xinjiang, and morphological characters, the secondary metabolites, and the phylogenetic tree of ITS were studied.The results showed that: (1) there were three species of Lecidea new to China which were Lecidea fuscoatrina Hertel & Leuckert, L. perlatolica Hertel & Leuckert and L. polypycnidophora U. Rupr. & Türk, and photos of the thallus, apothecia, asci and ascospores of them were provided. (2) The taxonomic status of the three species and the related species were studied and discussed through the ITS phylogeny in detail. The three species and the related species respectively formed three clades and were used to identify the species having subtle morphological differences.