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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. 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: 2. Hertella. Genus of unknown placement (incertae sedis); Peltigerineae; Lecanorales.

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Calothrix, Scytonema, and Tolypothrix (A. Beck 22-05-97); Rivulariaceae, Scytonemataceae, and Microchaetaceae; Chroococcales and Nostocales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Filamentose or granular. Upper Surface: Olive; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate or lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface or attached by holdfasts; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Prominent; external filaments absent. Exciple: White or brownish yellow. Periphyses: Absent. Epithecium: Apical cells brown or olive. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Brown or brownish yellow.

Ascospores: c. 8 per ascus, ellipsoid or reniform, 7-11 µm long, 3.5-6 µm wide, obtuse; septa absent; 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 or sessile, formed all accross the thallus surface.

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