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): Triebel D. (00-2-10) and Scholz P. (02-05-14); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 3. Distopyrenis. Pyrenulaceae Rabenh. (1870); Pyrenulales.

Taxonomic Literature: Aptroot A., Bibl. Lichenol. 44: 1-178 [41-46] (1991); Harris R. C.,
More Florida lichens including the 10c tour of the pyrenolichens: 1
192 [94-97], Bronx NY (1995).

Biogeography: Checklist records: Guianas, Sonoran Desert, and United States and Canada (continental).

Thallus: Indistinct. Upper Surface: Special structures absent. 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: Perithecioid, orbicular, irregular, or linear, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Wall: With a carbonized black clypeus around the ostiole, not fused. Margin: Distinct to prominent; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s positive, not hemiamyloid. Interascal Hyphae: Present, scarcely branched to distinctly branched (only branched at the tips), not or scarcely anastomosed. Hypothecium: White.

Asci: Tholus thickened, not amyloid; ocular chamber indistinct or broad; dehiscence bitunicate; exoascus not amyloid, not hemiamyloid.

Ascospores: c. 8 per ascus, broadly ellipsoid, ellipsoid, or fusiform, 12-19 µm long, 5-10.5 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally (submuriform), 1-3-transversally septate, formed by the endospore wall layer; wall thin, thickened at the septum (thick endosporium), not constricted where the septum meets the spore wall, dark brown, in Lugol's Solution negative, wall not ornamented.

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

Conidiogeneous Cells: Apical. Conidia: Filiform or bacilliform; microconidial, not branched; aseptate; up to 0-septate; cell wall hyaline.

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