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Ahtiana Goward (1985)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Elix J. A. (95-06-01) and Scholz P. (02-05-13); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 3. Ahtiana. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Type: Ahtiana sphaerosporella (Müll. Arg.) Goward.

Taxonomic Literature: Elix J.A., Bryologist 96: 359-383 (1993); Goward T., Bryologist 88:
367-371 (1985); Thell A., Goward T., Randlane T., Kärnefelt E.I.
& Saag A., Bryologist 98: 696-605 (1995); Ryan B.D. in: Nash T.H. III et al. (eds), Lichen Flora of the Greater Sonoran Desert Region vol. 1: 91-92, Tempe (2002);.

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

Ecology: Biotroph; lichenized; lignicolous or corticolous.

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

Thallus: Foliose, not subdivided parts, lobed. Thallus Outline: Soon disappearing. Upper Surface: Green or yellow; special structures absent or present:; not pseudocyphellate; eciliate or ciliate; 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; 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 or directly at the thallus margin, soon sessile. Margin: Prominent; external filaments absent. Exciple: Grey or white. Periphyses: Absent. Epithecium: Apical cells brown or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

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

Ascospores: c. 8 per ascus, 4-6 µm long, 4-6 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Conidia: Bifusiform, lageniform, or bacilliform; aseptate.

Secondary Metabolites: Present, of the following substance class(es): (higher) aliphatic acids and dibenzofurans [and usnic acids].

(report generated 04.Okt.2007)


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