According to morphological and molecular data, a new species of Lecidea s. str., Lecidea glacierensis, is described from Xinjiang Province, China. It is distinctive due to its well-developed, regularly areolate to bullate thallus, and its habitat on calciferous rocks. This species was collected mostly in the area of Tianshan No.1 Glacier, which is located at an elevation of 3454 m and c. 118 km south-west of Urumqi and is considered to be one of the most important dryland glacier areas in Asia. An illustration and detailed description of the taxon are provided. Bogeda Peak, Lecidea s. str., phylogeny, taxonomy, Tianshan No. 1 Glacier