[2] It is characterised by its distinctive bluish-grey circular soralia on the thallus, Lecanora-like apothecia, and simple, hyaline ascospores.

The type specimen was collected by the first author in Brazil, precisely between Feira de Santana and Milagres in Bahia.

[2] Maronora cyanosora bears some resemblance to certain corticolous species of Lecanora that have dark hypothecia, as noted by H. Thorsten Lumbsch and colleagues.

Furthermore, the ascus tip of Maronora cyanosora shows similarities to the Fuscidea-type, further supporting its placement in a separate genus within the Fuscideaceae family.

[2] The thallus of Maronora cyanosora has a pale ochraceous-white colour, minute rimose structure, and thin cortex, measuring up to 0.1 mm in thickness.

[2] Through thin-layer chromatography, the major compound identified is atranorin, accompanied by at least five unidentified aliphatic acids as submajor components.

[2] Maronora cyanosora is found exclusively on tree bark in the Caatinga, an ecoregion of semi-arid tropical vegetation in Brazil.