Lecanora ahmadii A. Noor & Saba sp. nov. (Fig. 1)MycoBank: MB859024Etymology: —In honor of (the late) Prof. Dr. Sultan Ahmad, a renowned mycologist in Pakistan.Diagnosis: —Differs from Lecanora pseudargentata due to its dark grey to greyish green, rough, pruinose, esorediate thallus having light brown, sessile apothecia.Holotype:— PAKISTAN. Punjab province, Murree district; 33°90’70” N, 73°39′43″ E; alt. 2291 m elev., on bark, 15 April 2024, Atika Noor, AN-06. GenBank accession: ITS = PV606632.Description: —Thallus: Corticolous, upto 2.5 cm diameter, cracked, rimose to areolate or verruculose, prothallus: not visible, thin, opaque, ecorticate, surface: Dark grey to grayish green, rough, pruinose, esorediate, prothallus absent, Apothecia: Sessile, 0.3–0.5 mm in diameter, lecanorine type, lecanorine light brown to dark brown in colour, disc: round to oval, plane, epruinose, verrucose, margins: light olive to whitish grey in colour, thick persistent, entire, verruculose, Amphithecium: present having abundant algal cells, disappear with 10% KOH, Amphithecium: present, with numerous algal cells, with large crystals insoluble in K, corticate; cortex: present, hyaline, distinct, basally thickened, gelatinous or interspersed, 20 µm thick laterally, 60 µm thick basally, Parathecium: hyaline, containing crystals soluble in KOH. Epihymenium: upto 18 µm, with light brown pigments dissolving in KOH, hymenium: hyaline, clear; paraphyses: thickened (up to 7 µm wide) apically, not pigmented; subhymenium: hyaline, 15–20 µm thick; hypothecium: hyaline, with oil droplets asci: clavate, 8-spored, 12–18 µm wide and 55–75 µm in length, ascospores: hyaline, simple, ellipsoid, small, 04–06 µm wide, 08–12 µm in length; wall less than 1 µm thick Pycnidia: absent conidia: filiform, Spot tests: K+ greenish, C-, KC+ Discoloration.Habitat:—corticulous, verruculose, on branches, truncks and twigs of Pinus roxburgii (Sarg.).Known geographical distribution:—So far, known only from the type locality, Murree district, Punjab, Pakistan.Additional material examined:— PAKISTAN. Punjab province, Murree district, near spring water: 33°90’70” N, 73°39′43″ E; alt. 2291 m elev., 15 April 2024, Atika Noor, AN07, GenBank accession: ITS = PV606633.Notes: Lecanora ahmadii sp. nov. is morphologically allied to L. pseudargentata, L. paramarea, and L. chlarotera, but is distinguished by its dark grey to greyish green, rough, pruinose, esorediate thallus, egranulose epihymenium, and K ⁺ greenish, C ⁻, KC⁺ chemical reactions. The species lacks pycnidia, bears filiform conidia, and develops round to oval, sessile apothecia. Phylogenetically it falls in a sister clade to L. pseudargentata.