Graphis or Opegrapha
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January 30, 2022 at 4:24 pm #32299
This is likely to be a difficult one (maybe impossible) particularly from the photographs alone but as I have not graduated to having a microscope I cannot go much further with a more positive ID at present. I have however checked both species using the BLS maps and where I live Opegrapha is much more recorded over Graphis however that depends on an awful lot also. I don’t suppose there is anyway to be more positive about this ID for now ?. January 30, 2022 at 5:02 pm #44642Sorry I had missed this, probably in the middle of a deadline rush, from the picture names I see you were at a choice between Opegrapha atra(now Arthonia atra) or Graphis scripta. Definitely not Arthonia atra, see the pictures at https://fungi.myspecies.info/all-fungi/arthonia-atrahttps://fungi.myspecies.info/all-fungi/arthonia-atra” class=”bbcode_url”> Graphis scriptasenso lato, and from the cracks and slightly raised thallus that appear to surround the apothecia, this is most likely the commonest morph “ Graphis betulina“. Neil
January 31, 2022 at 10:59 am #44643I replied to a different enquiry about the varieties of Graphis scripta just a couple of days ago and mentioned that they were being studied. Do you have a link to this Neil? Hadn’t heard of ‘betulina’ yet. January 31, 2022 at 11:39 am #44644Neil that’s clarifies thing nicely for that one far better than I had hoped – thank you – but could I just grab your attention one more time – as to your view on the two more attached photographs taken previously in a different location. There are similar on the embedment of the apothecia but they are much shorter. So is this still Graphis scripta. From Dobsons it does look more like G.elegans but close up do not seem to show side furrows. January 31, 2022 at 2:40 pm #44645Maxine See earlier post
https://fungi.org.uk/viewtopic.php?t=3215 ” class=”bbcode_url”> https://fungi.org.uk/viewtopic.php?t=3215 Warwickshire Lad. This is still
Graphis scripta, possibly morphotype Graphis betulina. Very different is morphotype Graphis pulverulenta, which should also be about, this has a pruinose disks, see https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Graphis_pulverulenta.htm ” class=”bbcode_url”> https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Graphis_pulverulenta.htm Neil
January 31, 2022 at 2:45 pm #44646All Andre Aptroot’s paper on the potential morphological species of the
Graphis scriptacomplex is free access on Research Gate (not sure if you need to be registered to access) https://www.researchgate.net/publication/269627298_Recognition_of_Four_Morphologically_Distinct_Species_in_the_Graphis_scripta_Complex_in_Europe ” class=”bbcode_url”> https://www.researchgate.net/publication/269627298_Recognition_of_Four_Morphologically_Distinct_Species_in_the_Graphis_scripta_Complex_in_Europe Neil
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