The new species Lecanora ulrikii from Bhutan and Thailand is described. It belongs to Lecanora s. str. and is characterized by relatively large, orange-brown to brown apothecia that are constricted at the base, a clear to inspersed hymenium, an epihymenium of the glabrata-type, and by the presence of atranorin, usnic acid and the isoarthothelin chemosyndrome. Further, three species, L. arthothelinella, L. austrotropica and L. subimmergens, are reported for the first time from Thailand.