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

The description has been generated directly from a database. In cases of errors and insufficiencies consult the corresponding LIAS data entry and revision forms to make the necessary modifications. Changes will appear in the subsequent update of data entry forms and natural language descriptions. [To verify the actual status of the pages, select the reload frame function in the context menu!]
These pages are XHTML compatible designed. May be that problems arise with older web browser versions.

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Tehler A. (95-11-27) and Scholz P. (02-05-17); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 17 (A. Aptroot 99-09-27). Syncesia. Genus of unknown placement (incertae sedis); Arthoniales.

Type Information: Type: Syncesia albida Taylor (= Syncesia myrticola (Fée) Tehler).

Taxonomic Literature: Tehler A., Cryptog. Bot. 3: 139-151 (1993), Tehler A., Flora
Neotropica 74: 1-48 (1997); Tehler A. in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 478, Tempe (2002).

Lichen Photobionts: Primary photobiont present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia; Trentepohliaceae; Trentepohliales, Ulvophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, leprose or granular. Thallus Outline: Soon disappearing or persistent. Upper Surface: White or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, becoming adnate or soon sessile, stromatic. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells brown, hyaline, or brownish yellow. Interascal Hyphae: Present, scarcely branched or distinctly branched, not or scarcely anastomosed or distinctly anastomosed. Hypothecium: Black or brown.

Asci: Tholus thickened, amyloid, with amyloid tube; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid or hemiamyloid.

Ascospores: c. 8 per ascus, curved (sometimes nearly straight) or fusiform, 22-59 µm long, 3-6 µm wide; septa present; transversally septate, 3-transversally septate, formed by the proper spore wall; 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, adnate, or sessile, formed all accross the thallus surface.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsides, ß-orcinol depsides, ß-orcinol depsidones, (higher) aliphatic acids, or dibenzofurans [and usnic acids].

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.

LIAS Home