Synonyms: Bilimbia hypnophila f. killiasii (Hepp) Szatala; Bilimbia killiasii (Hepp) H. Olivier; Mycobilimbia killiasii (Hepp) Rehm
Distribution: N - TAA (Brackel 2016).
Description: Thallus inapparent, developing inside the thalli of Peltigera-species and staining their surface grey-green, not lichenized. Apothecia biatorine, sessile, reddish yellow to blackish, 0.4-0.7 mm across, with an initially flat, soon convex disc, and a thin, soon excluded proper margin. Epithecium yellowish brown; hymenium colourless; paraphyses simple, cioherent, slightly thickened above; hypothecium pale yellowish brown. Asci 8-spored, cylindric-clavate, with a K/I+ blue apical dome penetrated from below by a narrow, K/I- apical cushion surrounded by an indistinct, apically often tapering, wall K/I- but surrounded by an I+ red-brown, K/I+ blue outer layer. Ascospores (1-)3-5(-7)-septate, hyaline, often curved, 18-40 x 5-8 μm. Photobiont absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: a poorly known lichenicolous fungus growing on the thalli of Peltigera-species, which does not belong to Bacidia s.str.
Growth form: Lichenicolous fungus
Substrata: soil, terricolous mosses, and plant debris
Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain