Traponora varians (previously Lecidea exigua)?
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On a couple of Ash twigs from Killarney NP, Ireland – is this Traponora varians (previously Lecidea exigua)? Apothecia becoming convex with a thin thalline margin, the thallus K+ faintly yellow, UV+ orange.
Spores simple with thick walls, first specimen 7-10 x 4-6 µm, second specimen 8-12.5 x 5-6(-7) µm.
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[attachment=1]zw Traponora varians Q2 240828-5.jpg[/attachment] 
[attachment=0]zw Traponora varians Q2 240828-8.jpg[/attachment] Thank you both but I think I must have got well and truly side-tracked with this one! Specimen below was both K/UV(wet) and K/UV(dry) negative, also K-, C-, KC- and UV-.
Reverting to my original thought of Lecanora I checked sections in water under polarised light but no crystals in the margins or granules in the epithecium. The asci were 8-spored, spores simple 8-12.5 x 5-6(-7) µm.
This could fit with Myriolecis (Lecanora) hagenii but that’s a species I’m unfamiliar with?
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