Nine new lichen species and 64 new records from Sri Lanka Author Weerakoon, Gothamie Author Aptroot, André text Phytotaxa 2016 2016-10-19 280 2 152 162 http://dx.doi.org/10.11646/phytotaxa.280.2.5 journal article 10.11646/phytotaxa.280.2.5 1179-3163 13651969 Schistophoron muriforme Weerakoon & Aptroot , sp. nov. ( Fig. 2K–N ) Mycobank No.: MB 817616 Schistophoron with thallus pale yellowish white, surrounded by a usually diffuse brown prothallus; Ascomata sessile , lirelliform or ellipsoidal or branched, c. 0.3–0.5 mm wide, c. 0.3–0.4 mm high, c. 0.7–1.5 mm long, area above hamathecium completely filled with mazaedium, ascospores brown, muriform, 3–7 × 2–4-septate, globose to ellipsoid, 15–30 × 15–18 μm. Type: — SRI LANKA . Morningside, on bark of tree, 24 April 2015 , G.Weerakoon Mo12A ( holotype PD , isotype F). Thallus crustose, continuous, not corticate, dull, pale yellowish white, surrounded by a usually diffuse brown prothallus. Algae trentepohlioid. Ascomata sessile , lirelliform or ellipsoidal or branched, c . 0.3–0.5 mm wide, c . 0.3–0.4 mm high, c . 0.7–1.5 mm long, margin white, c . 0.2 mm wide. Excipulum pale brown. Hypothecium hyaline. Hamathecium not inspersed, hyaline, paraphysoids 2–2.5 μm wide, area above hamathecium completely filled with mazaedium. Ascospores brown, muriform, 3–7 × 2–4-septate, globose to ellipsoid, 15–30 × 15–18 μm, lumina rounded. Pycnidia not observed. Chemistry. Thallus UV–, C–, K–, KC–, Pd+ yellow. TLC: Psoromic acid. Distribution and habitat: —On tree in wet tropical mountain forest. Only known from Sri Lanka . Discussion: —Only three other species are known in the genus Schistophoron ( Tibell 1996 , Aptroot & Sipman 2007 ), and none have muriform ascospores, although S. tenue Stirton (1876: 165) has submuriform, 2–3 × 0–1-septate, ascospores.