The holotype was collected at Punta Caraumilla, Bahia Laguna Verde, southwest of Valparaíso, on September 15, 1968, by Otto Zöllner Schorr [de].

The fungus grows specifically on the thallus of Roccella portentosa, a fruticose lichen commonly found along the rocky Pacific coast.

The species epithet labyrinthicum (Latin for "labyrinthine" or "intricate") refers to the maze-like appearance of its gall-forming ascomata (fruiting bodies).

These galls have a labyrinthine surface reminiscent of Chiodecton dilatatum, subdivided into multiform lirellate loculi by whitish, erumpent striae of stromatic plectenchyma.

This species is of particular interest to lichenologists due to its unique gall-forming nature and its specific association with R. portentosa, a lichen historically used for textile dye production.