Polycoccum evae Calat. & V. J. Rico

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. (02-02-13). 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: Calatayud V. & Rico V.J., Mycotaxon 53: 29-32 (1995).

Biogeography: Northern hemispheric. Continent: Europe. Region(s): South-western Europe. Country or state(s): Spain (incl. Andorra & Monaco).

Ecology: Biotroph; lichenicolous; growing on non-calciferous rock (granite). Host or Phorophyte Taxonomy: Dimelaena oreina.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, subglobose, forming inside the thallus or mycelium of the host, not emerging, .1-.2 mm in diam., with a brown surface. Margin: Brown. Exciple: Paraplectenchymatous. Hymenium: Gelatinized, iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 1-2 µm wide. Hypothecium: Brown.

Asci: 65-90 µm long, 17-22 µm wide; tholus not amyloid; ocular chamber present; narrow; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid; ascoplasm dextrinoid (I+ reddish).

Ascospores: Not uniseriate, c. 8 per ascus, spores 6-8 per ascus, ellipsoid, (17)-18-23-(25) µm long, (6)-7-10-(11) µm wide, obtuse; septa present; transversally septate, 1-transversally septate; lumina more or less of equal size; wall thick (halonate), distinctly differentiated into primary and secondary wall (halonate), not constricted where the septum meets the spore wall, becoming pigmented, middle brown or dark brown, not ornamented (halonate) or ornamented, distinctly halonate, i.e., with a thick mucilaginous sheath.

(report generated 04.Okt.2007)