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Stigmidium schaereri (A. Massal.) Trevis.

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 Data set author(s): Cáceres M. Data set not revised; not to be published after submission.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 [505-508] (1994).

Biogeography: Northern hemispheric, subalpine and alpine. Continent: Europe. Region(s): Middle Europe and South-western Europe. Country or state(s): Austria, Germany, Switzerland (incl. Liechtenstein), France (excl. Corsica), and Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia).

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

Thallus: Indistinct (vegetative hyphae hyaline).

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose, forming inside the thallus or mycelium of the host, becoming adnate to soon sessile, abundant, 57-115 µm wide, 60-125 µm high, with a black surface. Margin: Dark brown, 10-20 µm wide. Exciple: Hyphae 1-3 µm wide, 4.5-9 µm long, brown or dark brown. Periphyses: Present. Hymenium: Iodine reaction: not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed; cells 1.5-2.5 µm wide. Hypothecium: Pale brown or white.

Asci: Clavate or broadly cylindrical, not stipitate or indistinctly stipitate, 29-43 µm long, 12-17 µm wide; tholus not amyloid; ocular chamber present; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid; ascoplasm not dextrinoid.

Ascospores: Not uniseriate, c. 8 per ascus, spores 8 per ascus, ellipsoid or oblong-obtuse, (10)-12-13.4-15-(18) µm long, (3)-4-4.3-5 µm wide, obtuse; transversally septate, 1-transversally septate; lumina more or less of equal size; wall thin, not constricted where the septum meets the spore wall, becoming pigmented, hyaline or pale brown (mature ascospores usually with pigmented perispore), in Lugol's Solution negative, wall not ornamented or ornamented.

Conidiomata: Present.

Conidia: Cylindrical; 3-3.5 µm long, .5-1 µm wide.

(report generated 04.Okt.2007)

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