地卷属1中国新记录种——西方地卷(新拟)

A Newly Recorded Species of the Lichen Genus Peltigera from China,Peltigera occidentalis (?.E.Dahl) Kristinsson

通过对采自黑龙江省呼中自然保护区地卷属地衣的形态解剖学和化学研究,结合基因nrDNA ITS序列的系统发育分析,报道了地卷属地衣1中国新记录种——西方地卷(新拟)[Peltigera occidentalis (?.E.Dahl)Kristinsson]。该种的识别特征为上表面平滑,中部稍具光泽,无绒毛、裂芽和小裂片;下表面边缘淡棕色,中部棕黑色,脉纹扁平且明显,假根单一至束状。该文对基于中国标本的西方地卷进行了详细描述,并与形态相似的3个种——小瘤地卷、多指地卷和犬地卷分别进行了比较,提供了西方地卷形态相似种的检索表。

Peltigera occidentalis(?.E.Dahl)Kristinsson is reported new to China based on the specimen collected from Heilongjiang Province.The morphology,anatomy and chemistry analysis,and a phylogentic analysis of nrDNA ITS sequence were carried out.The new record species can be distinguished by the smooth and shiny upper surface,no tomenta,phyllidia and isidia;the marginal pale brown and central dark brown lower surface,flat and distinct veins,simple to fasciculate rhizines.Detailed description of P.occidentalis basing on the Chinese specimen and discussion with allied species,i.e.P.scabrosa,P.ploydactylon and P.canina and a key to them were provided.