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Data Set Maintenance: Data set author(s): Scholz P. (02-05-18). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Synonyms: Thelotrema (santense); Thelotremataceae (Nyl.) Stizenb. (1862); Ostropales.

Taxonomic Literature: Fink B., The Lichen Flora of the United States, 1-426 [134], Ann Arbor (1960); Kalb K., Mycotaxon 79: 319-328 (2001).

Biogeography: Checklist records: Australia and United States and Canada (continental).

Lichen Photobionts: Primary photobiont present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia; Trentepohliaceae; Trentepohliales, Ulvophyceae, Eukariota. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts. Upper Surface: Special structures absent or present:; eciliate; without hairs; isidiate; not cephalodiate. Lower Surface: Attached by the whole lower surface.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, irregular, forming all across the thallus surface, becoming adnate. Margin: Prominent. Exciple: Black. Periphyses: Absent. Hypothecium: White.

Ascospores: c. 8 per ascus, ellipsoid, 16-28 µm long, 7-12 µm wide, obtuse; septa present; both transversally and longitudinally, 2-5-transversally septate; wall middle brown.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed (mostly in the tips of the isidia).

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