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Stigmidium joergensenii R. Sant.

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 Data set author(s): Cáceres M. Data set not revised; not to be published after submission.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 [492-494] (1994).

Biogeography: Continent: Europe and Southern America. Region(s): South-eastern Europe and Western South America (Andes). Country or state(s): Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia); Venezuela and Colombia.

Ecology: Biotroph (in some cases probably parasymbiontt); lichenicolous (in some cases probably parasymbiontt), endosubstratic. Host or Phorophyte Taxonomy: Coriscium viride; Omphalina foliacea.

Thallus: Indistinct. Upper Surface: Pale brown (vegetative hyphae).

Medulla: Iodine reaction in Lugol's solution positive (hyphae strongly BCr+ dark blue to violet).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose, forming inside the thallus or mycelium of the host, not emerging, moderately abundant, small, 30-45 µm wide, 30-45 µm high, with a pale brown surface. Margin: Smooth, brown, 5-7 µm wide. Disk: Smooth. Exciple: Hyphae 1.5-2.5 µm wide, 2-7.5 µm long, pale brown. Periphyses: Present. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed; cells 1.5-2 µm wide. Hypothecium: Pale brown or white.

Asci: Broadly clavate, not stipitate, (19)-23-27-(29) µm long, (7)-10-11-(13) µm wide; dehiscence bitunicate (fissitunicate); ascoplasm not dextrinoid.

Ascospores: Not uniseriate, c. 8 per ascus, spores 8 per ascus, ellipsoid or clavate (subclavate), (8)-10-11.5-(12) µm long, 3.5-4-(4.5) µm wide, obtuse; septa present, transversally septate, 1-transversally septate; lumina of equal size or apically enlarged, constricted at the centre; wall thin, remaining hyaline, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed.

(report generated 04.Okt.2007)

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