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Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. Data set not revised; not to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Stigmidium. Genus incertae sedis: Stigmidium; of unknown placement (incertae sedis).

Taxonomic Literature: Roux C. & Triebel D., Bull. Soc. Linn. Provence 45: 451-542 [495-496] (1994).

Biogeography: Northern hemispheric. Continent: Europe. Region(s): Northern Europe. Country or state(s): Sweden.

Ecology: Biotroph; lichenicolous, endosubstratic; growing on bryophytes (on mossy rocks). Host or Phorophyte Taxonomy: Peltigera leucophlebia.

Thallus: Indistinct. Upper Surface: Brown (vegetative hyphae pale to medium brown).

Medulla: Iodine reaction in Lugol's solution positive (vegetative hyphae strongly BCr+ blue violet intense).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose, forming inside the thallus or mycelium of the host, not emerging, becoming adnate, abundant, 50-65 µm wide, 55-70 µm high, with a black surface. Margin: Black, 5-10 µm wide. Disk: Smooth. Exciple: Hyphae 1-2.5 µm wide, (2)-4-9 µm long, dark brown. Periphyses: Present. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed; cells 1.5-2 µm wide. Hypothecium: Dark brown.

Asci: Clavate, not stipitate (or shortly stipitate), 30-39 µm long, 13-17 µm wide; ocular chamber present; dehiscence bitunicate (fissitunicate); ascoplasm dextrinoid.

Ascospores: Not uniseriate, c. 8 per ascus, spores 8 per ascus, oblong-obtuse, clavate (subclavate), or oblong, (12)-13.5-14.1-15-(15.5) µm long, 3.5-4.3-5-(5.5) µm wide, obtuse; septa present, transversally septate, 1-transversally septate; lumina of equal size or apically enlarged, constricted at the centre; wall thin, laterally constricted where the septum meets the spore wall, remaining hyaline, hyaline, in Lugol's Solution positive, wall not ornamented.

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