Protothelenella Räsänen (1943)

Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Scholz P. (02-05-16, 06-06-12) and Triebel D. (98-01-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 9. Protothelenella. Protothelenellaceae Vezda, H. Mayrhofer & Poelt (1985); of unknown placement (incertae sedis).

Type Information: Type: Protothelenella reducta (Th. Fr.) Räsänen.

Taxonomic Literature: Döbbeler P. in: Larsen A., Ammirati J.F. & Redhead S.A. (eds), Arctic and Alpine Mycology 2. Environm. Sci. Res. 34: 87-107 [91-93] (1987); Fryday A.M., Bryologist 107(2): 231-233 (2004); Hafellner J., Herzogia 10: 1-28 [21] (1994); Hinteregger E., Biblioth. Lichenol. 55: 1-346 [274-276] (1994); Mayrhofer H., Herzogia 7: 13-79 [40-59] (1985); Mayrhofer H. in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 408-409, Tempe (2002); Mayrhofer H. & Poelt J., Herzogia 7: 13-79 (1985); Purvis O.W. & James P.W. in: Purvis O.W. et al. (eds), The lichen flora of Great Britain and Ireland: 1-710 [503-505] (1992).

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

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

Lichen Photobionts: Primary photobiont absent or present; chlorococcal. Primary photobiont taxonomy: Elliptochloris; genus incertae sedis; family of unknown placement (incertae sedis). Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, granular, rimose, or areolate (primarily areolate). Upper Surface: White, grey, green, olive, brownish yellow, or brown; special structures absent. 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: Perithecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: External filaments absent. Exciple: Black, green, olive, brownish yellow, brown, or orange. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s positive, hemiamyloid. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: White, green, olive, brownish yellow, or brown.

Asci: Tholus thickened, amyloid, with amyloid tube; dehiscence bitunicate; exoascus euamyloid, not hemiamyloid.

Ascospores: Ellipsoid, broadly ellipsoid, ovoid, oblong, or fusiform, 10-50 µm long, 3.5-15 µm wide, obtuse or aciculate; septa present; transversally septate or both transversally and longitudinally, 3-56-transversally septate; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Conidia: Bacilliform.

Secondary Metabolites: Not detected or present, of the following substance class(es): orcinol depsides.

(report generated 04.Okt.2007)