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Dacampia rufescentis (Vouaux) D. Hawksw.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Triebel D. (00-11-15). Data set reviewer(s): Triebel D.; not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Dacampia rufescentis (Vouaux) D. Hawksw. Dacampia. Dacampiaceae Körb. (1855); Dothideales.

Type Information: Basionym: Pleospora rufescentis Vouaux.

Taxonomic Literature: Taxonomic notes: forming decolourized circular necrotic patches 2-3 mm diam. Hawksworth D.L., Notes Roy. Bot. Gard. Edinburgh 43: 497-519 (1986);
Martínez Moreno M.I., Ruzia 15: 1-200 [168] (1999).

Biogeography: Northern hemispheric, boreal and Mediterranean. Continent: Europe and Southern America. Region(s): Northern Europe, Middle Europe, and South-western Europe. Country or state(s): United Kingdom, Norway (record with questionmark), Sweden, France (excl. Corsica), and Spain (incl. Andorra & Monaco); Southern Argentina (Argentina). Checklist records: Great Britain, Iberic Peninsula, and Sweden and Norway.

Ecology: Biotroph; lichenicolous; endosubstratic; growing on inorganic soil or non-calciferous rock. Host or Phorophyte Taxonomy: Peltigera canina, P. praetextata, P. ponojensis, P. rufescens.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, subglobose or obpyriform, forming inside the thallus or mycelium of the host, not emerging, moderately abundant or abundant, .15-.25 mm in diam., 75-100 µm wide, 70-110 µm high. Wall: Not carbonized. Margin: Smooth, dark brown, inhomogenously pigmented; external filaments absent. Exciple: Hyphae radiating outwards (prosoplectenchymatous); 3-5 µm wide, 8-12 µm long; not carbonized; brown, dark brown, or pale brown. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s negative. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed; cells 2-2.5-(3) µm wide. Hypothecium: White or pale brown.

Asci: Clavate (elongate-clavate) or sub-cylindrical, 100-150 µm long, 20-25 µm wide; tholus widening towards apex, not amyloid; ocular chamber absent or present; indistinct; dehiscence bitunicate; exoascus not amyloid.

Ascospores: Not uniseriate (distichous), c. 8 per ascus, spores 8 per ascus, broadly ellipsoid or ellipsoid, (23)-24.5-35 µm long, 10-15 µm wide, obtuse; septa present; sub-both transversally and longitudinally, 3-transversally septate, 1-2 longitudinal septa per transversal septum; lumina apically enlarged, constricted at the centre; wall thin, laterally constricted where the septum meets the spore wall, becoming pigmented, middle brown (golden), 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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