Vainio, E. (1909). Lichenes in viciniis stationis hibernae expeditionis Vegae prope pagum Pitlekai in Sibiria septentrionali a Dre. E. Almquist collecti. Praefationem scripsit F. Almquist. Arkiv for Botanik, Band 8, No. 4: 11-175.
Thallus crustose, uniform, moderately thick or moderately thin, areolate, areoles rounded or deformed, c. 0.7-0.8 millim. wide, dispersed or partly crowded, dark grey or becoming ashy grey or dark brown/grayish-brown-ashy grey, opaque, contains single apothecium or rarely multiple apothecia, KHO-, I becoming blue, hypothallus blackish, often radiate +/- developed. Apothecia minute, c. 0.2-0.4 millim. wide, immersed in thallus, disc black, naked, plane, not raised above thallus, eventually often ringed, spot-shaped or slightly prominent, blackish, thallus formed, very narrow, in the form of an encircling margin, parathecium not developed or in other wider, eventually naked, evanescent and formed from blue-blackish hypothallus. Hypothecium +/- wide, dark brown/grayish-brown-black. Spores 8, distichous, 1-septate, dark brown/grayish-brown, 0.012-0.016 millim. long, 0.005-0.008 millim. thick, membrane more unequal, moderately thick, not or very slightly constricted.—Hymenium c. 0.060-0.080 millim. thick, I persistently becoming blue. Epithecium olive-or dark brown/grayish-brown-sooty, KHO-. Paraphyses moderately lax, coherent, apices sooty-clavate. Thallus KHO- seen with microscope.—M. microplaca, M. ectolechioides, M. injucunda, M. crystallifera and M. Tschutschorum habit is entirely similar and also part of the compound growth and almost single-coloured hypothecia and reactions are different.