Acanthothecis Clem. (1909)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-18) and Sipman H. (98-01-15); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 10 (estimation provided by A. Aptroot 99-09-27). Acanthothecis. Graphidaceae Dumort. (1822); Ostropales.

Type Information: Type: Acanthothecis pachygraphoides (Vain.) Clem.

Taxonomic Literature: Vainio E.A., Acta Soc. Fauna Fl. Fenn. 7: 93-96 (1890).

Ecology: Biotroph; lichenized; corticolous.

Lichen Photobionts: Primary photobiont present; trentepohlioid. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts. Upper Surface: Grey or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular or linear, forming all across the thallus surface, not emerging, becoming adnate. Margin: Indistinct to distinct; external filaments absent. Exciple: Black or white. Periphyses: Absent. Epithecium: Apical cells black or hyaline. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present?, scarcely branched, not or scarcely anastomosed. Hypothecium: Black or white.

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

Ascospores: c. 8 per ascus, ellipsoid, 50-180 µm long, 8-29 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally, 10-35-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.

Conidia: Globose.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)