Stigmidium calopadiae Matzer

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 Data set author(s): Cáceres M. Data set not revised; not to be published after submission.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: Matzer M., Mycological Papers 171: 1-202 [157-159] (1996).

Biogeography: Northern hemispheric. Continent: Australasia and Southern America. Region(s): Australia and Southern South America (dry and subtropical). Country or state(s): New South Wales (Australia).

Ecology: Biotroph; lichenicolous; growing on living leaves. Host or Phorophyte Taxonomy: Calopadia cf. subcoerulescens.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose or broadly ovoid, forming inside the thallus or mycelium of the host, becoming adnate or soon sessile, 25-75 µm wide, 25-75 µm high, with a black surface. Margin: Black, homogenously pigmented, 4-10 µm wide. Exciple: Paraplectenchymatous; brown or brownish red. Periphyses: Present (1-2 µm wide). Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Absent (in mature ascomata). Hypothecium: Brown or brownish red.

Asci: Broadly clavate (elliptical, ovoid to saccate), not stipitate, 19-26 µm long, 9-12 µm wide; tholus not amyloid; ocular chamber present; dehiscence bitunicate (fissitunicate); exoascus not amyloid, not hemiamyloid; ascoplasm dextrinoid (endoascus CR+ orange).

Ascospores: c. 8 per ascus, spores 8 per ascus, ellipsoid or obovoid, 7-8.3-10-(11) µm long, 2-2.3-3 µm wide, obtuse; septa present, transversally septate, 1-transversally septate; lumina apically enlarged, constricted at the centre; wall thin, laterally constricted where the septum meets the spore wall, remaining hyaline, hyaline, not ornamented.

Conidiomata: Absent resp. not observed.

(report generated 04.Okt.2007)