Lichenologist 38, 6: 543 (2006).

Synonyms: Index Fungorum

Protolog: Lithothelium corticola ascis quadrisporis, ascosporis magnis, 37-50 x 12-19 µm.

Protolog type data: Typus: Thailand, Chiang Mai Prov., Doi Chiang Dao, alt. 1600 m, on tree trunk, 29 January 1996, D. Allen 497 (BM-holotypus; ABL-isotypus).

Type locality: Thailand, Chiang Mai Province, Doi Chiang Dao, on tree trunk, 1600 m, 29.3.1996, D. Allen 497 (BM - holotype; ABL - isotype).

Type locality coordinates: 19°23'59?N, 98°52'36?E; 19.399722, 98.876667.

Molecular barcode: Data lacking.

Thallus: epiphoeodic, pale green to brownish, thin (c. 50-100 µm), a bit shiny but not corticate, uneven and irregularly rimose, up to 5 cm diam., surrounded by a 0.1-0.2 mm wide black prothallus line. Ascomata solitary or 2 with fused ostioles (not walls), closed, ovoid, semi-immersed, leaving black pits, black, 0.6-0.9 mm diam. Walls of exciple and involucrellum fully integrated; combined wall c. 100 µm thick above and at the sides, c. 30 µm thick below the asci. Ostiole lateral. Hymenium not inspersed, initially gel IKI+ blue in most part and IKI+ orange in lower part; after some minutes all hymenium IKI+ orange. Paraphyses unbranched, c. 1-1-5 µm wide. Asci cylindrical, with a rounded ocular chamber, containing 4 ascospores. Ascospores hyaline, with 3 distosepta, endospore c. 3-5 µm thick, lumina rounded, 37-50 x 12-19 µm, perispore gelatinous, c. 1 µm thick, not ornamented. Pycnidia unknown (Aptroot 2006: 543).

Photobiont: trentepohlioid, cells c. 4-6 µm diam (Aptroot 2006: 543).

Chemistry: No lichen substances.

Ecology: On bark in a rather sheltered secondary rainforest (Aptroot 2006: 543).

Distribution: Database

Molecular data: Genbank

Mycobank: Mycobank

Note:

Pictures: Tropical Lichens