Polycoccum tinantii Diederich

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. (02-02-25). 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: Diederich P., Mycotaxon 37:297-330 [316-318] (1990).

Biogeography: Northern hemispheric. Continent: Europe. Region(s): Middle Europe. Country or state(s): Benelux (Belgium & Luxembourg) (Luxembourg).

Ecology: Biotroph (growing as a commensal); lichenicolous (growing as a commensal); growing on bark. Host or Phorophyte Taxonomy: Caloplaca ferruginea.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, subglobose, forming inside the thallus or mycelium of the host, becoming adnate to soon sessile, .17-.28 mm in diam., with a black surface. Margin: Black, 24-33 µm wide. Exciple: Paraplectenchymatous; hyphae 4-8 µm wide; dark brown. Hymenium: Iodine reaction: Lugol’s positive. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 1-1.5 µm wide.

Asci: Clavate (elongate clavate); tholus not amyloid; dehiscence bitunicate; exoascus not hemiamyloid; ascoplasm not dextrinoid.

Ascospores: Not uniseriate, c. 8 per ascus, spores 8 per ascus, ellipsoid, 18-26 µm long, 7.5-11 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; lumina of equal size; wall laterally constricted where the septum meets the spore wall, becoming pigmented, middle brown, in Lugol's Solution negative, wall ornamented.

(report generated 04.Okt.2007)