Pleoscutula Vouaux (1913)

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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Pleoscutula. Dermateaceae Fr. (1849); Leotiales.

Type Information: Type: Pleoscutula arsenii Vouaux.

Taxonomic Literature: Hafellner J., Herzogia 6: 289-298 (1983) ["1982"], Vouaux L., Bull. Trimestriel Soc. Mycol. France 29: 399-494 [435-436] (1913) - sub Pleoscutula arsenii.

Ecology: Biotroph; lichenicolous.

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, soon sessile. Margin: Prominent; external filaments absent. Exciple: Brown or brownish yellow. Periphyses: Absent. Epithecium: Apical cells brown or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

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

Ascospores: More than 32 per ascus, curved, filiform, fusiform, or semilunate, 9-13 µm long, 2-4 µm wide, aciculate; septa present; transversally septate, 1-transversally septate; wall thin, not thickened at the septum, hyaline or pale brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Present or absent resp. not observed.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)