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Polycoccum crassum Vezda

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. (01.08.17). 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: Vezda A., Ceska Mykol. 24: 220-229 [227-226] (1970); Hawksworth D.,
Nova Hedwigia 35: 755-762 [758] (1983); Hawksworth D. & Diederich
P., Trans. Brit. Mycol. Soc. 90: 293-312 [300] (1988).

Biogeography: Northern hemispheric, montane. Continent: Europe. Region(s): Middle Europe. Country or state(s): United Kingdom and former Czechoslovakia (incl. Czech Republic & Slovacia).

Ecology: Biotroph; lichenicolous. Host or Phorophyte Taxonomy: Peltigera lepidophora, P. cf. neckeri, Peltigera sp.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, obpyriform, forming inside the thallus or mycelium of the host, becoming adnate, 300-400-(500) µm wide. Wall: Complete. Margin: External filaments absent. Exciple: Paraplectenchymatous. Hymenium: Gelatinized, iodine reaction: Lugol’s positive. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 2-2.5 µm wide.

Asci: Sub cylindrical, (90)-100-120 µm long, (10)-12-15-(16) µm wide; dehiscence bitunicate.

Ascospores: More or less not uniseriate or uniseriate, c. 4 per ascus, spores 4 per ascus, broadly fusiform, (25)-30-32-(36) µm long, 8-10-(11) µm wide, obtuse; septa present; transversally septate, 1-transversally septate; lumina more or less of equal size; wall becoming pigmented, middle brown, ornamented (coarsely rugulose with labyrinthiform ornamentation).

Conidiomata: Absent resp. not observed.

(report generated 04.Okt.2007)

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