[1] Found in Sri Lanka, the lichen is characterised by its pale ochraceous thallus and sessile apothecia with dark brown discs, covered with thick white granular pruina.

The type specimen was collected by the first author in Morningside, Sooriyakanda, on the bark of a dead Syzygium tree.

The apothecia are sessile, round to angular or ellipsoidal, with a dark brown disc measuring approximately 0.2–0.5 mm in width, covered with a thick white granular pruina.

[2] The lichen is most similar to Lecanactis dubia and Lecanographa illecebrosula, but differs from them in ascospore size, apothecium margin characteristics, and chemical reactions.

[2] Lecanactis minutissima is found in wet, mountainous tropical forests, where it grows on the stringy bark of dead trees.