JennyS
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I emailed the details and images to Paul Diederich and his reply is below:
Quote:From the anatomy of the pycnidial wall, I can confirm that it is a Didymocyrtis, and not Briancoppinsia, which is also growing on parmelioid hosts.
As D. cladoniicola and C. foliaceiphila are both known with certainty from hosts that are not related with Cladonia, e.g., Parmelia or Ramalina, confirmed by DNA sequences, an occurrence on Punctelia does not represent any problem.
Conidia of D. cladoniicola are (3.8–)4.7–5.9(–7.3) × (2.0–)2.4–3.0(–3.5) µm, l/b (1.4–)1.7–2.2(–2.
, while those of D. foliaceiphila are (5.0–)5.8–7.1(–7.5) × (2.0–)2.2–2.7(–3.0) μm, l/b ratio (2.0–)2.4–3.0(–3.5)4×6 agrees with cladoniicola, while 2-2.5 is more close to foliaceiphila. In my opinion, you should measure a larger number and also calculate the lenght/width ratio statistically, as that character may be the best to distinguish both.
Nothing remained of the original specimen so it will have to remain as Didymocyrtis sp. but I was hoping someone could explain how to calculate the lenght/width ratio statistically?
Hi Neil – investigating more Irish Lecanora’s last night and I think this L. argentata (POL crystals, no granules) also seems to be showing a trace of gangaleoidin in the margins? 
[attachment=1]Lecanora argentata 240828 013.jpg[/attachment] 
[attachment=0]Lecanora argentata 240828 019 UV.jpg[/attachment]
Lecanora argentataFound an Ash twig collected 2012 from mid Cork (vcH4) and started investigating the Lecanora’s on it. Might this one be L. pseudargentata, though I’m slightly wary of the UV results I get? (Added bonus, specimen I can send!) 
[attachment=3]w Lec 2 120419 009.jpg[/attachment] 
[attachment=2]w Lec 2 120419 010 UV.jpg[/attachment] 
[attachment=1]w Lec 2 120419-3.jpg[/attachment] 
[attachment=0]w Lec 2 120419-3b.jpg[/attachment] Thanks Neil – and identification is so much more straightforward with spores! When I posted the query on the FB Lichenicolous page Wolfgang von Brackel suggested perhaps a Roselliniopsis (and Roselliniopsis tartaricola is recorded on Pertusaria leioplaca).
However what must be the “apical phialidic synanamorphs” on this one appeared slightly different and seemed to more resemble those shown in Lichenicolous Fungi vol.2 page 355 for Roselliniella stereocaulorum than the Roselliniopsis tartaricola illustration on page 356?
But I am so totally out of my depth with these!!!
? Roselliniella
[attachment=1]zz Pert Q1 120108 064.jpg[/attachment] Roselliniopsis tartaricola (from previous post here)
[attachment=0]zz Roselliniopsis tartaricola 100209 029.jpg[/attachment] And a slightly better image of the “apical phialidic synanamorph” (I think I need to swallow a taxonomic dictionary to make sense of the descriptions in LF1 and 2!)
[attachment=1]z Roselliniopsis tartaricola 100209 029.jpg[/attachment] 
[attachment=0]z Roselliniopsis tartaricola 100209 041.jpg[/attachment] Ah, thanks Neil – I checked the FLF2 Taeniolella pertusariicola description but not Roselliniopsis tartaricola. Are these below what is meant by “apical phialidic synanamorph”?
[attachment=0]z Q Roselliniopsis tartaricola 100209-3.jpg[/attachment]
