Stigmidium congestum (Körb.) Triebel

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 Data set author(s): Cáceres M. Data set not revised; not to be published after submission.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 [483-487] (1994).

Biogeography: Northern hemispheric, colline, submontane, montane, upper montane, and subalpine. Continent: Asia-Temperate and Europe. Region(s): Northern Europe, Middle Europe, South-western Europe, South-eastern Europe, and Western Asia. Country or state(s): Sweden, Austria, Germany, Switzerland (incl. Liechtenstein), France (excl. Corsica), Spain (incl. Andorra & Monaco), and Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia); Turkey (excl. European Turkey).

Ecology: Biotroph; lichenicolous; growing on bark. Host or Phorophyte Taxonomy: Lecanora argentata, L. chlarotera, L. horiza, L. intumescens, L. rugosella, L. salicicola, L. subrugosa.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose or subglobose, within the ascocarp disks of the host, not emerging, becoming adnate, abundant, 30-77 µm wide, 40-85 µm high, with a black surface. Margin: Black, homogenously pigmented, 5-12 µm wide. Disk: Smooth. Exciple: Paraplectenchymatous; hyphae 1.5-2 µm wide, 5-8 µm long, brown or dark brown. Periphyses: Present. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed; cells 1.5-2 µm wide. Hypothecium: Brown.

Asci: Globose, clavate, or broadly cylindrical, indistinctly stipitate, 24-37 µm long, 10-18 µm wide; ocular chamber present; dehiscence bitunicate; ascoplasm dextrinoid.

Ascospores: c. 8 per ascus, spores 8 per ascus, ellipsoid or oblong-obtuse, (11)-12-12.6-14-(16) µm long, (2.5)-3-3.3-4 µm wide, obtuse; septa present, transversally septate, 1-transversally septate; lumina more or less of equal size; wall thin, not constricted where the septum meets the spore wall or laterally constricted where the septum meets the spore wall, remaining hyaline, hyaline, in Lugol's Solution positive, wall not ornamented or ornamented (finely verrucose).

Conidiomata: Present.

Conidia: 2-3 µm long, .5-1.5 µm wide.

(report generated 04.Okt.2007)