Stigmidium caloplacae Alstrup & Olech

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 Data set author(s): Cáceres M. Data set not revised; not to be published after submission.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: Fragm. Florist. Geobot. 41(2): 747-752 [748] (1996).

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

Ecology: Biotroph; lichenicolous, endosubstratic. Host or Phorophyte Taxonomy: Caloplaca stillicidiorum.

Lichen Photobionts: Primary photobiont absent.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, obpyriform (pyriform), forming inside the thallus or mycelium of the host, becoming adnate, 60-75 µm wide, up to 100 µm high, with a dark brown (immersed parts paler brown) surface. Wall: Not carbonized. Margin: Brown, 10 µm wide; external filaments absent. Exciple: Paraplectenchymatous; not carbonized, dark brown. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Hypothecium: Dark brown.

Asci: Clavate (ellipsoid with conical top), indistinctly stipitate, 40-48 µm long, 12-15 µm wide; tholus not amyloid; ocular chamber present; narrow; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid; ascoplasm not dextrinoid.

Ascospores: Not uniseriate, c. 8 per ascus, spores 8 per ascus, ellipsoid, 10-13 µm long, 3.5-4.5 µm wide, obtuse; septa present, transversally septate, 1-transversally septate; lumina almost of equal size; wall not constricted where the septum meets the spore wall, hyaline, in Lugol's Solution negative.

Conidiomata: Absent resp. not observed.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)