Stigmidium icmadophilae R. Sant.

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. (03-03-27). Data set not revised; not to be published after submission.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: Santesson R., Fungi Lichenicoli Exsiccati Fasc. I-II: 17 (1984).

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

Ecology: Biotroph; lichenicolous, endosubstratic or episubstratic; growing on inorganic soil. Host or Phorophyte Taxonomy: Icmadophila ericetorum.

Lichen Photobionts: Primary photobiont absent.

Thallus: Indistinct (Vegetative hyphae brown spreading on the surface of the host or in the host tissue).

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, subglobose, forming inside the thallus or mycelium of the host, within the ascocarp disks of the host (only rarely), not emerging, becoming adnate to soon sessile, 50-80 µm wide, with a black surface. Wall: Not carbonized. Margin: Black, 8-10 µm wide; external filaments absent. Disk: Smooth. Exciple: Paraplectenchymatous; not carbonized, dark brown. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Absent. Hypothecium: Dark brown.

Asci: Clavate, indistinctly stipitate, 30-40 µm long, 15-21 µm wide; tholus not amyloid; dehiscence bitunicate; ascoplasm not dextrinoid.

Ascospores: Not uniseriate, c. 8 per ascus, spores 8 per ascus, ellipsoid, 14-19 µm long, 4.5-5.5 µm wide, obtuse; septa present, transversally septate, 1-transversally septate; lumina of equal size; wall thin, laterally constricted where the septum meets the spore wall, hyaline, not ornamented.

Conidiomata: Absent resp. not observed.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)