变黄黑文衣，中国黑文衣属地衣一新记录种

Phaeographis flavescens, A New Record of the Lichen Genus Phaeographis in China

摘要:

通过对文字衣科黑文衣属形态学、解剖学、化学与分子生物学的研究，发现中国新记录种1种，即变黄黑文衣(Phaeographis flavescens Dal-Forno & Eliasaro)，该种主要特征为地衣体壳状，表面浅黄绿色，无光泽，光滑；子囊盘弯曲, 多分支，聚生于假子座中；盘缘黑色，相邻线盘之间有小缝隙，盘面较平坦，黑色，覆有白色粉霜；子囊层无色透明，侧丝顶端分支；子囊含8个子囊孢子；子囊孢子褐色，横隔透镜型，(4~)6胞室，大小19~25.5 μm×6~7 μm，I+紫红色。该种分布于云南和福建，该研究丰富了对中国黑文衣属物种组成与分布的认知。

Abstract:

Based on the methods of morphology, anatomy, chemistry and molecular, Phaeographis flavescens Dal-Forno & Eliasaro (Graphidaceae) is recorded as new to China. It is characterized by crustose thallus, surface pale yellowish green, dull, smooth; ascomata flexuose, branched, immersed in pseudostromata; the lirellae have a narrow, brown-black edge, with small lateral cracks; disc flat, black, with white pruina; hymenium colorless, paraphyses with branched tips; ascospores 8 per ascus, brown, with transverse septa, (4-)6 locular, 19-25.5 μm×6-7 μm, I+ wine-red. The species is found in Yunnan and Fujian provinces, and the study enriches our understanding of the Phaeographis composition and distribution in China.