Sarcographina heterospora (Nyl.) Z.F. Jia & Luecking

Jia, Ze-Feng & Luecking, Robert, 2017, Resolving the genus Phaeographina Muell. Arg. in China, MycoKeys 21, pp. 13-32 : 26

Sarcographina heterospora (Nyl.) Z.F. Jia & Luecking comb. nov.

Graphis heterospora Bas.: Nyl., Ann. Sci. Nat. Bot. sér. 4, 11: 261, 1859; Phaeographina heterospora (Nyl.) Zahlbr., Cat. Lich. Univers. 2: 439, 1923; Gymnographa heterospora (Nyl.) Staiger. Biblthca Lichenol. 85: 271, 2002. Type: Reunion, Lepervanche-Mézières 43 (H-NYL 7815, holotype!).

Description.

Thallus corticolous, crustose, surface yellowish to pale grey, flat to slightly rough; apothecia lirelline, immersed in stromata; stromata white, irregularly circular, 0.1-1 mm wide; lirellae thin, black, immersed, in irregular, stellate cluster, 0.05-1 mm wide; discs black, closed; proper exciple uncarbonized, pale yellow brown; hymenium clear; 8 ascospores per ascus, brown, rounded ellipsoid, irregularly 4/1, 2/2 or 3/1 -2 locular, 10-13 × 6-8 µm, I+ red-brown.

Chemistry.

Psoromic acid and conpsoromic acid.

Notes.

This species is very similar to Sarcographina cyclospora Müll. Arg., but the latter differs in having a brownish to apically carbonized excipulum.