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Stigmidium solorinarium (Vain.) D. Hawksw.

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 Data set author(s): Cáceres M. Data set not revised; not to be published after submission.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 [509-510] (1994).

Biogeography: Northern hemispheric. Continent: Europe. Country or state(s): Finland, United Kingdom, Sweden, Benelux (Belgium & Luxembourg) (Luxemburg), and Spain (incl. Andorra & Monaco); Greenland.

Ecology: Biotroph; lichenicolous, endosubstratic; growing on calciferous rock. Host or Phorophyte Taxonomy: Solorina saccata.

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

Medulla: Iodine reaction in Lugol's solution positive, strongly reacting.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose, forming inside the thallus or mycelium of the host, becoming adnate, abundant, 55-75 µm wide, 55-75 µm high, with a black surface. Margin: Black, 5-13 µm wide. Exciple: Hyphae 1-3.5 µm wide, 3-9 µm long, dark brown. Periphyses: Present. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed; cells 1.5-2.5 µm wide. Hypothecium: White or pale brown.

Asci: Clavate or cylindrical (broadly subcylindrical), not stipitate, 22-35 µm long, 9-13 µm wide; tholus not amyloid; dehiscence bitunicate; ascoplasm not dextrinoid.

Ascospores: Not uniseriate, c. 8 per ascus, spores 8 per ascus, ellipsoid, oblong-obtuse, or clavate (subclavate), (10)-10.5-12.1-13.5-(14) µm long, 3-3.6-4-(4.5) µm wide, obtuse; septa present, transversally septate (pseudotetraseptate), 1-transversally septate; lumina of equal size or apically enlarged, constricted at the centre; wall thin, not constricted where the septum meets the spore wall, becoming pigmented, hyaline, not ornamented or ornamented (mature ascospores), distinctly halonate, i.e., with a thick mucilaginous sheath.

Conidiomata: Present.

Conidia: Cylindrical; 2.5-3.5 µm long, .5-1 µm wide.

(report generated 04.Okt.2007)

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