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Data Set Maintenance: Data set standard item. Data set author(s): Marbach B. (00-05-11). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: at least 13. Cratiria. Synonyms: Buellia; Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Taxonomic Literature: Taxonomic notes: Main characteristics: excipulum with central brighter layers, with
lichen substances (exept C. melanochlora); Ascospores brown, with one
or two septures, with apical weak to strong thickened wall; conidia 4-
5,5 µm long. Marbach B. Corticole/lignicole Arten der Flechtengattung Buellia. -
Bibl. Lichenol. 74: 1-384 (2000).

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

Thallus: Not subdivided parts. Thallus Outline: Soon disappearing. Upper Surface: Grey, yellow, or white; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate (C. dissimilis, C. exalbida with corallin isidia); not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Not attached, thallus vagrant; special structures absent; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, becoming adnate to soon sessile. Margin: Distinct to prominent; external filaments absent. Exciple: Black (excipulum central brighter, with lichen substances) or brown. Periphyses: Absent. Epithecium: Apical cells grey (when apothecia with pruina) or brown. Hymenium: Oil inspersed, iodine reaction: Lugol’s positive, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black or brown.

Ascospores: c. 8 per ascus, broadly ellipsoid or ellipsoid, (12)-14-18-24-(28) µm long, (5)-6-8-11-(14) µm wide, obtuse; septa present; transversally septate, 1-1-2-transversally septate, formed by the proper spore wall; wall thin or thick (wall apically thickened), distinctly differentiated into primary and secondary wall (wall apically thickened), not thickened at the septum, not constricted where the septum meets the spore wall, dark brown or middle brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Present or absent resp. not observed; pycnidial; immersed to adnate.

Conidiogeneous Cells: Apical. Conidia: Bacilliform (4-5,5 µm long); microconidial, not branched; aseptate; cell wall hyaline.

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

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