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Polycoccum dannenbergii (Stein ex. Eitner) Vezda

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. @EXCL@ Calatayud V. (02-06-21). 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., Kew Bull. 30: 183-203 [197] (1975); Vezda A., Ceská Mykol. 29: 104-109 [109] (1969).

Biogeography: Northern hemispheric. Continent: Europe. Region(s): Middle Europe. Country or state(s): United Kingdom.

Ecology: Biotroph; lichenicolous. Host or Phorophyte Taxonomy: Buellia dubyana; Pertusaria flavida, P. cf. leioplaca.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, subglobose, forming inside the thallus or mycelium of the host, becoming adnate (erumpent), 300-450 µm wide, with a black surface. Margin: Black. Exciple: Black. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 2 µm wide.

Asci: Clavate (elongate-clavate), 60-85 µm long, 15-20 µm wide; dehiscence bitunicate.

Ascospores: Not uniseriate (irregularly arranged), c. 8 per ascus, spores 8 per ascus, ellipsoid, 16-19 µm long, 9-11 µm wide, obtuse; septa present (ascospores simple at first but becoming 1-septate when mature); transversally septate, 1-transversally septate; lumina apically enlarged, constricted at the centre; wall laterally constricted where the septum meets the spore wall, becoming pigmented, middle brown or pale brown.

(report generated 04.Okt.2007)

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