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

Dichosporidium Pat. (1903)

Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Triebel D. (98-01-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 6. Dichosporidium. Opegraphaceae Stizenb. (1862); Arthoniales.

Type Information: Type: Dichosporidium glomeratum Pat. (= Dichosporidium nigrocinctum (Ehrenb.: Fr.) G. Thor).

Taxonomic Literature: Eriksson O.E. & Hawksworth D.L., Syst. Ascomycetum 6: 111-165 [124] (1987); Hawksworth D.L., Bull. Brit. Mus. Nat. Hist. (Bot.) 9: 1-98 [73] (1981) - sub Dichosporium glomeratum; Henssen A. & Thor G., Nato ASI Series, series A: Life Sciences 269: 43-56 [44] (1994); Henssen A. & Thor G., Nord. J. Bot. 18: 95-120 (1998); Patouillard N., Bull. Soc. Mycol. Françe 15: 191-209 [207-208 + pl. IX, fig. 2] (1899); Thor G., Opera Bot. 103: 1-92 [63-75] (1990); Vouaux L., Bull. Soc. Mycol. Françe 28: 177-256 [198-199] (1912).

Biogeography: Checklist records: Guianas.

Ecology: Biotroph; lichenized; corticolous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont present; trentepohlioid. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts, filamentose, leprose, squamulose, or granular. Thallus Outline: Soon disappearing or persistent. Upper Surface: Green, grey, brownish yellow, or white; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Medulla: Iodine reaction not different with or without KOH pre-treatment (euamyloid).

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, forming all across the thallus surface, not emerging, stromatic. Margin: External filaments absent. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells hyaline. Hymenium: Iodine reaction: hemiamyloid. Interascal Hyphae: Present, distinctly branched, not or scarcely anastomosed. Hypothecium: Black, brown, or brownish yellow.

Asci: Dehiscence unitunicate; exoascus not hemiamyloid.

Ascospores: c. 8 per ascus, clavate, curved, or semilunate, 33-83 µm long, 2-5 µm wide; septa present; transversally septate, 4-10-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed or sessile, formed all accross the thallus surface.

Conidia: Bacilliform.

Secondary Metabolites: Not detected or present, of the following substance class(es): ß-orcinol depsidones.

(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.