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Pyrenidium sporopodiorum Matzer

Data Set Maintenance: Data set compiled. Data set author(s): Cáceres M. @EXCL@ Calatayud V. (02-12-18). Data set not revised; not to be published after submission.

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

Taxonomic Literature: Matzer M. Mycol. Pap. 171: 1-202 (1996).

Biogeography: Neotropical. Continent: Southern America. Country or state(s): West-central Brazil (Brazil).

Ecology: Biotroph; lichenicolous; endosubstratic; growing on living leaves. Host or Phorophyte Taxonomy: Sporopodium cf. leprieurii var. citrinum.

Lichen Photobionts: Primary photobiont absent.

Thallus: Indistinct (vegetative hyphae usually not distinct).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, obpyriform or ovoid, forming inside the thallus or mycelium of the host (on gall-like malformations of the host thatllus), not emerging, becoming adnate, 100-120 µm wide, 110-150 µm high, with a black or dark brown surface. Wall: Not carbonized. Margin: Brown or dark brown, 4-16 µm wide; external filaments absent. Exciple: Not carbonized; brown or dark brown. Periphyses: Present. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, distinctly branched, not or scarcely anastomosed; cells 2-3 µm wide. Hypothecium: Brown.

Asci: Cylindrical, distinctly stipitate, 45-65 µm long, 9-11 µm wide; tholus not amyloid; ocular chamber absent; indistinct; dehiscence bitunicate (fissitunicate); exoascus not amyloid, not hemiamyloid; ascoplasm dextrinoid (endoascus CR+ orange).

Ascospores: Uniseriate (overlapping-uniseriate), c. 4 per ascus, spores 4 per ascus, ellipsoid, (12)-13-15.5-18 µm long, 5-5.6-(6) µm wide, obtuse; septa present; transversally septate, (2)-3-transversally septate; lumina of equal size or apically enlarged, constricted at the centre; wall thin, laterally constricted where the septum meets the spore wall, becoming pigmented, middle brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

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