Arthrorhaphis Th. Fr. (1860)

Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Triebel D. (98-01-01; 01-08-12); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 7. Arthrorhaphis. Arthroraphidaceae Poelt & Hafellner (1976); Patellariales.

Type Information: Type: Arthrorhaphis flavovirescens (A. Massal.) Th. Fr. (= Arthrorhaphis
citrinella (Ach.) Poelt).

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest, N.S. 7: 1-
893 [174] (1985); Galloway D.J., Flora of New Zealand. Lichens: 1-662
[20-21] (1985); Hawksworth D.L., Lichenologist 15: 1-44 (1983); Ihlen
P.G., Lichenologist 30: 27-57 [35-42] (1998); Kocourková J., Acta Mus. Nat. Pragae, Ser. B., Hist. Nat. 55 (3-4): 59-169 [68-70] (2000); Obermayer W., Nova
Hedwigia 58: 275-333 (1994); Poelt J. & Vezda A., Biblioth.
Lichenol. 9: 1-258 [19-21] (1977); Purvis O.W. in: Purvis O.W.,
Coppins B.J., Hawksworth D.L., James P.W. & Moore D.M. (eds), The
lichen flora of Great Britain and Ireland: 1-710 [95-96] (1992);
Tønsberg T. & Øvstedal D.O., Graphis Scripta 7: 11-
12 (1995); Santesson R. & Tønsberg T., Lichenologist 26:
295-299 (1994).

Biogeography: Checklist records: Austria, Bolivia, Germany, Great Britain, Italy, New Zealand, Sweden and Norway, and United States and Canada (continental).

Ecology: Biotroph; lichenized or lichenicolous; terricolous, bryophytic, lignicolous, or corticolous; substrate non-calciferous or calciferous.

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

Thallus: Indistinct or crustose, granular. Upper Surface: Grey, green, yellow, or brownish yellow; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

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 to substipitate. Margin: Indistinct to prominent; external filaments absent. Exciple: Black, green, brown, or olive. Periphyses: Absent. Epithecium: Apical cells black, green, brown, olive, or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Green, white, or brownish yellow.

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

Ascospores: 1–2 to c. 8 per ascus, fusiform, filiform, or oblong, 13-135 µm long, 2-8.5 µm wide, obtuse or aciculate; septa present; transversally septate, 2-28-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; sessile.

Secondary Metabolites: Not detected or present, of the following substance class(es): ß-orcinol depsides and pulvinic acid derivatives.

(report generated 04.Okt.2007)