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 not revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 7. Physcidia. Synonyms: Megalopsora Vain. (1921); Biatoraceae A. Massal. ex Stiz. (1862); Lecanorineae; Lecanorales.

Taxonomic Literature: Kalb K. & Elix J.A. in Knoph J.-G., Schrüfer K. & Sipman H.J.M., Biblioth. Lichenol. 57: 265-296 (1995); Tuckerman E., Proc. Am. Acad., Arts Sci. 5: 383-422 [400-401] (1862).

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

Thallus: Crustose or foliose, not subdivided parts, squamulose, lobed. Thallus Outline: Persistent. Upper Surface: Green, grey, or brownish yellow; special structures present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by holdfasts; special structures present:; 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, soon sessile. Margin: External filaments absent. Exciple: White. Periphyses: Absent. Hypothecium: White.

Asci: Tholus thickened, amyloid, with non-amyloid narrow axial body and amyloid convergent flanks towards apex; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, filiform, 15-40 µm long, 1.5-3 µm wide, obtuse; septa present; transversally septate, 1-3-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsides, ß-orcinol depsides, and benzyl esters.

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