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Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (99-01-01). Data set not revised.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: species. Lecidea (likely). Synonyms:-; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Magnusson A.H., Meddel. Göteb. Bot. Trädg. 10: 19 (1936); type specimen label data: U.S.A., New York, Adirondack Region (Chapel Pond near St. Huberts), 12 July 1932, J.W. Lowe (s.n.) (UPS, holotype).

Thallus: Areolate (primarily areolate), continuous throughout or dispersed along the periphery, continuous in the centre; lobes angular or rounded at the front; separate thallus parts.2-.5 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted or basally constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Brown (light brown), convex; not sorediate; without thalloconidia thalloconidia.

Upper Cortex: Epicortex present. Medulla: Iodine reaction in Lugol's solution negative or in Lugol's solution positive.

Ascocarps: Soon sessile, not constricted or slightly constricted at the base, 40-140 per cm², .4-.8-(1.2) mm in diam.. Margin: Not flexuose, excluded, indistinct, 35-60 µm wide, epruinose. Disk: Plane to strongly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 3-5.5 µm wide; grey or yellow; inspersed with crystals. Epithecium: Apical cells olive or green, cell pigment reacting with 10% HCl (in H2O), cell pigment HCl+ blue. Hymenium: 40-70 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 10-35 µm high; white to pale green. Hypothecium: Brown to dark brown.

Ascospores: Ellipsoid to oblong, (7)-9.1-13.5-(16) µm long, (3.5)-4-5.2-(6.5) µm wide; wall not ornamented.

Spot Tests: Medulla: K –, C –, PD – to + orange; ascocarp margin (in section): K –, C – disk: C – hypothecium: K – to + purplish brown (chinoide reaction); epihymenium: K –.

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