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Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Lumbsch H. T., Scholz P. (06-06-12), and Triebel D. (99-01-01, 99-05-18); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 2. Lethariicola. Odontotremataceae D. Hawksw. & Sherwood (1982); Ostropales.

Type Information: Type: Lethariicola sipei Grummann (= Lethariicola cucularis (Norman) Lumbsch & D. Hawksw.).

Taxonomic Literature: Taxonomic notes: synonymized with Odontotrema. Diederich P., Zhurbenko M.P. & Etayo J., Lichenologist 34(6): 479-501 (2002); Lumbsch H.T. & Hawksworth D.L., Biblioth. Lichenol. 38: 325-333 (1990); Sherwood-Pike M.A., Mycotaxon 28: 137-177 [146-148] (1987).

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

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. Wall: Not carbonized, not fused. Margin: Prominent; external filaments absent. Exciple: Black, brownish yellow, or brown. Periphyses: Present. Epithecium: Apical cells hyaline. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White, brownish yellow, or brown.

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

Ascospores: c. 8 per ascus, ellipsoid, broadly ellipsoid, or ovoid, 10-19 µm long, 4-8 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally, 3-6-transversally septate, formed by the proper spore wall; wall thin, not thickened at the septum, not constricted where the septum meets the spore wall, hyaline, in Lugol's Solution negative, wall not ornamented.

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