in Lücking, Fl. Neotrop., Monogr., 103: 193, 2008. Basionym: Microglaena biatorella Arnold - Verh. zool.-bot. Ges. Wien, 23: 501, 1873.
Synonyms: Leucocarpia biatorella (Arnold) Vězda
Distribution: N - Frl.
Description: Thallus crustose, episubstratic, greenish white to yellowish white, thin, smooth to mostly granulose-verrucose, the granules soredia-like. Perithecia globose, 0.2-0.6 mm across, sometimes with a short neck near the ostiole, at least half covered by a thalline layer, pale-coloured, with a darker, yellowish or yellowish-pinkish ostiole. Excipulum pale ochraceous pink throughout, made of tangentially arranged hyphae; involucrellum absent. Hamathecium of 60-70 x c. 1 μm periphyses, interascal filaments absent; hymenial gel I+ red, K/I+blue. Asci 8-spored, fissitunicate, thick-walled, clavate-cylindrical, with a thick tholus, I-. Ascospores first 3-septate, then rapidly submuriform, with up to 8 transverse septa and up to 6 longitudinal septa, hyaline, ellipsoid, (25-)28-38(-45) x 10-14 μm. Photobiont chlorococcoid. Spot tests: all negative. Chemistry: no lichen substances.
Note: an inconspicuous lichen found on thin layers of more or less calciferous, humus-rich ground, or over epilithic mosses, mostly in upland areas; probably overlooked and more widespread, but never common, in the Alps.