Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.

Homostegia Fuckel (1870)

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; 02-04-05); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Homostegia. Genus of unknown placement (incertae sedis); Dothideales.

Type Information: Type: Homostegia adusta Fuckel (= Homostegia piggotii (Berk. & Broome)

P. Karst.).

Taxonomic Literature: Taxonomic notes: Homostegia parmeliana (Jacz.) Vouaux is excluded and accepted as type
species of the monotypic genus Trematosphaeriopsis Elenkin (see
Hafellner 2001).
Alstrup V.& Cole M.S., Bryologist 101(2): 221-229 (1998); Cole

M.S. & Hawksworth D.L., Mycotaxon 77: 305-338 [314-316] (2001);

Hawksworth D.L., Bull. Brit. Mus. (Nat. Hist.), Bot. 9(1): 1-98
(1981); Hawksworth D.L., Lichenologist 15: 1-44 [7, 38]
(1983); Hafellner J., Mycotaxon 80: 381-387 (2001); Keissler K. von,
Rabenh. Kryptog.-Fl. 8: 1-712 [298-304] (1930) - incl. Telimena
encaustica; Santesson R., Svensk Bot. Tidskr. 54: 501-522 [503]
(1960); Vouaux L., Bull. Trimestriel Soc. Mycol. France 28: 177-256
[196-198] (1912) - excluding H. encaustica.

Biogeography: Checklist records: Austria, Germany, Great Britain, and United States and Canada (continental).

Ecology: Biotroph; lichenicolous; 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: Perithecioid, orbicular, not emerging, stromatic (stromata pluriloculate). Margin: External filaments absent. Exciple: Black or brown. Periphyses: Absent. Hymenium: Iodine reaction: Lugol’s negative or Lugol’s positive, not hemiamyloid. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black or brown.

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

Ascospores: c. 8 per ascus, ellipsoid, fusiform, oblong-obtuse, ovoid, or curved, 18-36.5 µm long, 6-12 µm wide, obtuse or aciculate; septa present; transversally septate or both transversally and longitudinally, 3-transversally septate; wall thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, dark brown to sub-hyaline to pale brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed to present; pycnidial; immersed.

Conidiogeneous Cells: Apical. Conidia: Globose.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)

In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.