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Data Set Maintenance: Data set standard item. Data set author(s): Scholz P. Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Synonyms: Moelleropsis p. pt. (M. humida); Arctomiaceae Th. Fr. (1860); Agyriineae; Lecanorales.

Taxonomic Literature: Lumbsch H.T., Prado R. del & Kantvilas G., Lichenologist 37: 291-302 [298-300] (2005).

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Nostoc; Nostocaceae; Nostocales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Indistinct or crustose, granular. Upper Surface: Bluish grey; special structures present: (goniocysts); not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; with granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Wall: Not carbonized, not fused. Margin: Indistinct; external filaments absent. Exciple: Yellowish yellow. Periphyses: Absent. Epithecium: Apical cells hyaline. Hymenium: Iodine reaction: Lugol’s negative, not hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Yellowish yellow.

Ascospores: c. 8 per ascus, ellipsoid, 12.5-19.5 µm long, 6.5-9.5 µm wide, obtuse; septa absent or rarely present; transversally septate, 0-1-transversally septate; 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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