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Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (C.Kainz, 03-05-22).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Trapelia. Lecideaceae Chevall. (1826) @EXCL@ Agyriaceae Corda (1838).

Taxonomic Literature: Taxonomic notes: Ascoma morphology identical with Trapelia coarctata;. Purvis O.W. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992).

Ecology: Biotroph; lichenized; episubstratic; substrate non-calciferous (rarely on worked timber, and occasionally on peaty turf amongst rocks, especially those on the coast).

Thallus: Areolate (primarily areolate) (areoles smooth or minutely rugose, effigurate or subsquamulose, often +/- overlapping; marginal squamules 0.2-0.4 mm wide and 0.04-0.15(-0.2) mm thick, contorted, sometimes in irregular, knotted clusters, often sterile), subsquamulose. Upper Surface: White or brownish yellow, convex (+/-).

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