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Stigmidium arthrorhaphidis Hafellner & Obermayer

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 Data set author(s): Cáceres M. Data set not revised; not to be published after submission.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: Hafellner J. & Obermayer W., Cryptog. Bryol. Lichénol. 16(3): 177-190 [186] (1995).

Biogeography: Northern hemispheric, alpine. Continent: Asia-Tropical. Region(s): China and Eastern Asia. Country or state(s): Tibet-Qinghai; Nepal.

Ecology: Biotroph; lichenicolous, endosubstratic; growing on inorganic soil. Host or Phorophyte Taxonomy: Arthrorhaphis alpina var. jungens, A. citrinella.

Lichen Photobionts: Primary photobiont absent.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose, forming inside the thallus or mycelium of the host, not emerging, becoming adnate (seldom), 70-85 µm wide, with a brown surface. Wall: Not carbonized. Margin: Brown, (10)-15-25 µm wide; external filaments absent. Exciple: Paraplectenchymatous (with tangentially flattend polyedric cells); not carbonized, brown. Periphyses: Present. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Absent. Hypothecium: Brown.

Asci: Globose or broadly clavate, distinctly stipitate (shotly stipitate), 35-40 µm long, 10-12 µm wide; tholus not amyloid; ocular chamber present; narrow; dehiscence bitunicate (fissitunicate); exoascus not amyloid, not hemiamyloid; ascoplasm not dextrinoid.

Ascospores: c. 8 per ascus, spores 8 per ascus, obovoid, (10)-11-12-(13) µm long, 4-4.5-(5) µm wide, obtuse; septa present, transversally septate, 1-transversally septate; lumina more or less of equal size (basal cell sometimes slightly enlarged); wall thin, remaining hyaline, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

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