Hymenobia Nyl. (1854)
Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): 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: 1. Hymenobia. Genus of unknown placement (incertae sedis); of unknown placement (incertae sedis).
Type Information: Type: Hymenobia aporea (Nyl.) D. Hawksw. & O.E. Erikss.
Taxonomic Literature: Eriksson O.E., The non-lichenized pyrenomycetes of Sweden, Lund: 1-208 [7, 49] (1992); Eriksson O.E. & Hawksworth D.L., Syst. Ascomycetum 9: 1-38 [13] (1991); Triebel D., Biblioth. Lichenol. 35: 1-278 [219-222] (1989).
Biogeography: Checklist records: Austria, Great Britain, and Sweden and Norway.
Ecology: Biotroph; lichenicolous; substrate non-calciferous or 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: Perithecioid, orbicular, not emerging. Margin: External filaments absent. Exciple: White. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s negative, hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.
Asci: Tholus thickened, not amyloid; dehiscence unitunicate; exoascus not amyloid, not hemiamyloid.
Ascospores: 1–2 to c. 8 per ascus, curved or ovoid, 9-16 µm long, 3.5-7 µm wide, obtuse or aciculate; septa present; transversally septate, 1-2-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; pycnidial; immersed.
Conidiogeneous Cells: Apical. Conidia: Bacilliform.
Secondary Metabolites: Not detected.
(report generated 04.Okt.2007)
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