[4] Stigmidium cerinae is distinguished by its globular to slightly elongated ascomata, which are exceptionally dark, glossy, and appear in abundance, ranging from 6 to 60 on the apothecia of the lichen host.

The wall of the ascomata has a deep rufous-brown hue, with the upper portion appearing darker compared to the lighter lower part.

This structure measures between 5 and 10 μm in thickness and consists of cells with a similarly coloured wall, which are internally coated with very fine brown pigment granules.

As for the ascospores, they initially appear colourless, turning to a light brown towards the end of their lifecycle, possibly when they are dead.

[2] The fungus has been recorded from several localities: Austria, Germany, Italy, Switzerland,[2] Taymyr Peninsula in the Far North of Russia,[4] the East Siberian Lowland,[5] Romania,[6] and Slovenia.