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Dacampia hookeri (Borrer) A. Massal.

Data Set Maintenance: Data set compiled. Data set author(s): Triebel D. (00-12-06). Data set reviewer(s): Triebel D.; not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Dacampia hookeri (Borr.) A. Massal. Dacampia. Dacampiaceae Körb. (1855); Dothideales.

Type Information: Basionym: Verrucaria hookeri Borr.

Taxonomic Literature: Taxonomic notes: Dacampia hookeri is here treated in the wide sense i.e. including taxa with a wide range of spore size.

Some thallus feature like the two-layered thalli (basaliter brown) and moniliform hyphae have still to be added to the description. Secondary photobiont in some cases present: Nostoc.
Crivelli P.G., Ueber die heterogene Ascomycetengattung Pleospora
Rabh.; Vorschlag für eine Aufteilung. Zürich: 1-215 [196] (1983); Eriksson O.E., Opera Bot. 60: 1-209 [53-54] (1981);
Henssen A., Cryptog. Bot. 5: 149-158 (1995);.

Biogeography: Northern hemispheric, holarctic, arctic, subarctic, and boreal, upper montane, subalpine, and alpine. Continent: Europe and Northern America. Region(s): Northern Europe, Middle Europe, South-western Europe, East Europe, and Western Canada. Country or state(s): Finland, United Kingdom, Norway, Svalbard (= Spitsbergen; Norway), Austria, former Czechoslovakia (incl. Czech Republic & Slovacia), France (excl. Corsica), and Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia); Greenland and Alberta (Canada).

Ecology: Biotroph; lichenized or lichenicolous; terricolous or bryophytic; episubstratic; growing on inorganic soil or bryophytes; substrate calciferous. Host or Phorophyte Taxonomy: In part parasitic on Solorina sp.

Lichen Photobionts: Primary photobiont present, chlorococcal.

Thallus: Crustose (more or less distinctly lobate at the margin), areolate (primarily areolate) (provided with ridges or almost tessellate). Thallus Outline: Soon disappearing. Upper Surface: White or pale brown, smooth, pulverulaceous; special structures present:; cephalodiate (squamuluse, reddish brown, adjacent to the thallus margin or developping separately on the basal hyphal mat).

Upper Cortex: Present (with colourless epinecral layer).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Perithecioid, obpyriform or ovoid, not emerging, becoming adnate, moderately abundant or abundant, .35-.7 mm in diam.. Wall: Not carbonized. Margin: Smooth, black; external filaments absent. Exciple: Black or brown. Periphyses: Present. Hymenium: Not gelatinized or gelatinized, iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black or brown.

Asci: Cylindrical, distinctly stipitate, 180-240 µm long, 20-23 µm wide; tholus widening towards apex, not amyloid; ocular chamber absent; indistinct; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid.

Ascospores: Uniseriate, c. 8 per ascus, spores 8 per ascus, fusiform (to spindle shaped), 25-41 µm long, 13-14 µm wide, aciculate; septa present; both transversally and longitudinally, 3-4-(5)-transversally septate, 1-2 longitudinal septa per transversal septum; wall thin, becoming pigmented, middle brown (central segments chesnut brown to middle brown) or pale brown (end cells), 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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