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Polycoccum crespoae Váczi & D. Hawksw.

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. (02-10-22). Data set not revised; not to be published after submission.

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

Taxonomic Literature: Váczi P. & Hawksworth D. L., Lichenologist 33(6): 513-517 (2001).

Biogeography: Northern hemispheric. Continent: Australasia. Region(s): Australia. Country or state(s): Victoria (Australia).

Ecology: Biotroph; lichenicolous; endosubstratic. Host or Phorophyte Taxonomy: Chondropsis semiviridis.

Thallus: Indistinct (hyphae spreading through the cortex of the host).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, subglobose (subglobose to broadly ellipsoid), forming inside the thallus or mycelium of the host, not emerging, (85)-100-120-(130) µm wide, (105)-115-135-(155) µm high, with a dark brown surface. Margin: Brown, (6)-8-14-(15) µm wide; external filaments absent. Disk: Smooth. Exciple: Paraplectenchymatous (textura angularis); hyphae (5)-7-9-(13) µm wide, 2-3 µm long; brown. Hymenium: Iodine reaction: Lugol’s negative. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 1.5-2 µm wide.

Asci: Broadly clavate, distinctly stipitate (short-stalked), 44-64 µm long, 12.5-13 µm wide; ocular chamber present; dehiscence bitunicate (fissitunicate); exoascus not amyloid; ascoplasm dextrinoid.

Ascospores: Uniseriate (ovgerlapping), c. 4 per ascus, spores 4 per ascus, ellipsoid or pyriform, (14)-17-19.7-20-(21) µm long, (6)-6.5-6.8-7.5-(8) µm wide, obtuse; septa present; transversally septate, 1-transversally septate; lumina apically enlarged, constricted at the centre; wall thick (with gelatinous sheath), distinctly differentiated into primary and secondary wall (with gelatinous sheath), laterally constricted where the septum meets the spore wall, becoming pigmented, middle brown (deep yellow-brown), not ornamented (with gelatinous sheath).

(report generated 04.Okt.2007)

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