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Rhymbocarpus Zopf (1896)

Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Scholz P. (06-06-13; 06-08-07; 06-12-18) 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: 12. Rhymbocarpus. Leotiaceae Corda (1842); Leotiales.

Type Information: Type: Rhymbocarpus punctiformis Zopf.

Taxonomic Literature: Diederich P. & Etayo J., Lichenologist 32(5): 423-485 (2000);
Eriksson O.E. & Hawksworth D.L., Syst. Ascomycetum 10: 27-67
[51-52] (1991); Kümmerling H., Triebel D. & Rambold G.,
Biblioth. Lichenol. 53: 147-160 [157] (1993); Sherwood M.A.,
Hawksworth D.L. & Coppins B.J., Trans. Brit. Mycol. Soc. 75:
479-490 [482-484] (1981) - sub Skyttea cruciata; Triebel D.,
Biblioth. Lichenol. 35: 1-278 [142-144] (1989) - sub R.
punctiformis; Triebel D., Rambold G. & Nash III T.H., Mycotaxon
42: 263-296 [285] (1991); Zhuang W.-y. & Korf R.P., Mycotaxon
34: 647-653 (1989) - sub Skyttea lesdaini.

Biogeography: Checklist records: Great Britain, Italy, and Sweden and Norway.

Ecology: Biotroph; lichenicolous; corticolous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont absent. Secondary photobiont absent.

Thallus: Indistinct.

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 or perithecioid, orbicular, not emerging, becoming adnate to soon sessile. Margin: Prominent; external filaments absent or present. Exciple: Green, olive, brownish yellow, or brown. Periphyses: Absent. Epithecium: Apical cells hyaline. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Green, olive, brownish yellow, or brown.

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

Ascospores: c. 8 per ascus, ellipsoid or ovoid, 5-12 µm long, 1.8-4.5 µm wide, obtuse or aciculate; 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.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

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