UK Fungi

Jenny

I have not found Unguiculariopsis lesdainii, but I did check someone esle's specimen from a fence post in Hampshire and this was similar. The host was definitely not Lecanora saligna and like yours appeared to be Myriolecis dispersa.

Neil

Paul

The LGBI3 has the following abandon all hope all yee who enter warning in the Lacania genus description

A notoriously difficult genus whose species tend to predominate in oceanic areas. Some of the species currently recognized can be very difficult to separate, particularly where thickness ...

Chris

Yes does not look like an Agonimia cortex.

Agonimia octospora cortex

So I am out of ideas, sorry

Neil

Chris

The persistently brown spores should rule out Agonimia tristicula . As you say it seems to be a something of a match for Atla wheldonii other than not seen intact asci, but I do not know that species. The few pictures do not look similar, however, there are more at https://fungi.myspecies ...

Scrub that, just twigged, the conidiophores and the septate conidia reminded me of a Strigulaceae , then I remembered there is a Strigulaceae found on limestone in just your area: Swinscowia calcarea . It must be this, the conidia are very good match. See https://fungi.myspecies.info/all-fungi ...

Possibly the lichen is Lecanora campestris? Not that that appears to help!

Neil

Are you sure the thalli in the sun are not Parmotrema reticulatum? I think I can see some areas with fine reticulations in some pictures.

Neil

Pete

The spores are the wrong shape for Catinaria atropurpurea , the spore of the latter are quite ovoid but with some what pointed ends see http://www.irishlichens.ie/pages-lichen/l-474.html . The apothecia also do not look quite right

Not sure what it actually is! Catillaria flexuosa would be a ...

Jenny

We are probably at almost certainly Minutophoma chrysophthalmae. If you are confident yo saw some tiny conidia at first then it is OK I think.

Neil

Chris

The spore without the enlarged end cell is probably a stray Hysterium spore. Otherwise with the enlarged end cell we are probably in the Reichlingia clade, which includes, Coniocarpon , Synarthonia , Reichlingia and a lot of species still to transferred to one of these general from Arthonia ...

Actually the wall of both our the pycnidia do appear to have a very similar textura angularis as shown in the paper you linked to, so seems your specimen it is likely to be Minutophoma chrysophthalmae , but it would have been good to have seen the conidia. These are very small and are the little ...

The apothecia look a bit more irregular than is typical on bark, but looks OK otherwise and I can not think what else it would be.

Neil