Polycoccum kerneri J. Steiner

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. (01-09-04). Data set reviewer(s): Triebel D.; revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Polycoccum. Dacampiaceae Körb. (1855); Dothideales.

Taxonomic Literature: Hawksworth D.L., Lichenologist 26 (4): 337-347 [341-342] (1994);
Hawksworth D.L. & Diederich P., Trans. Brit. Mycol. Soc. 90:
293-312 [302] (1988); Steiner, J., Sitzungsber. Kaiserl. Akad. Wiss., Math.-Naturwiss. Cl. 102: 162 (1893)

102: 162 (1893).

Biogeography: Mediterranean. Continent: Europe. Region(s): Middle Europe and South-eastern Europe. Country or state(s): United Kingdom, France (excl. Corsica), and Greece.

Ecology: Biotroph; lichenicolous. Host or Phorophyte Taxonomy: Lecidea fuscoatra.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, subglobose, forming inside the thallus or mycelium of the host (on raised and swollen areoles of the host), becoming adnate (erumpent), .2-.3 mm in diam., 200-300 µm wide, with a black surface. Margin: Black. Exciple: Paraplectenchymatous; hyphae 5-8 µm wide; black. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 1-2.5 µm wide.

Asci: Broadly cylindrical, 85 µm long, 22 µm wide; dehiscence bitunicate (fissitunicate).

Ascospores: More or less uniseriate, c. 8 per ascus, spores 8 per ascus, broadly ellipsoid or ovoid, (12)-14-15-(17.5) µm long, (7)-8.5-10-(10.5) µm wide, obtuse; septa present; transversally septate, 1-transversally septate; lumina more or less of equal size; wall thin (with a gelatinous sheath), laterally constricted where the septum meets the spore wall (not to somewhat constricted at the septum), becoming pigmented, reddish brown (old ascospores), not ornamented (with a gelatinous sheath) or ornamented (young ascospores coarsely warted).

(report generated 04.Okt.2007)