Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.

Polycoccum decolorans Calat. & Triebel

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. (01.08.17). Data set reviewer(s): Triebel D. (01-08-15); revised; to be published after submission.

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

Taxonomic Literature: Calatayud V. & Rambold G., Lichenologist 30(3): 231-244 [239-241]


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

Ecology: Biotroph; lichenicolous; growing on non-calciferous rock (red sandstones, characteristic type of siliceous rock). Host or Phorophyte Taxonomy: Immersaria olivacea.

Thallus: Indistinct.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, globose or obpyriform (pyriform), forming inside the thallus or mycelium of the host, not emerging (more or less completely immersed), moderately abundant (occurring in groups of up to 8 ascomata), 75-150 µm wide, with a brown (middle to pale brown at ascomatal base; middle to dark) surface. Wall: Complete. Margin: Brown, inhomogenously pigmented, 15 µm wide; external filaments absent. Exciple: Paraplectenchymatous; hyphae 4-7 µm wide; brown. Periphyses: Absent. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 2-2.5 µm wide. Hypothecium: Brown (assumed).

Asci: Clavate (elongate-clavate) or sub cylindrical, distinctly stipitate (short stalked), 65-80 µm long, 13-15 µm wide; tholus not amyloid; ocular chamber present; narrow (weakly developed); dehiscence bitunicate (fissitunicate); exoascus not amyloid, not hemiamyloid.

Ascospores: Not uniseriate (biseriate), c. 8 per ascus, spores 6-8 per ascus, ellipsoid or oblong-obtuse, (16)-18-22 µm long, 6-8 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; lumina apically enlarged, constricted at the centre; wall thick (halonate when young), distinctly differentiated into primary and secondary wall (halonate when young), not constricted where the septum meets the spore wall, becoming pigmented, dark brown (greenish brown), not ornamented (halonate when young) or ornamented (rugose).

Conidiomata: Present.

Conidia: Cylindrical (bacilliform); (5)-(7) µm long, (1)-(2) µm wide.

(report generated 04.Okt.2007)

In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.