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It’s a good hypothesis to work with, at least. Crustose cyanolichens are almost all gelatinous / homiomerous (meaning cyanobacteria is distributed evenly throughout and there is little differentiation into medulla and cortices). It is easy to test for… with a microscope! :)
Verrucaria is also black, but it has perithecia not apothecia. Placynthiella, is black too, but it looks really different. Probably others I don’t know. But all the rest I’ve seen (photos of) are cyanolichens, mostly in Lichinales.
it is a spectacular specimen, but I had no clue about its possible classification. Why did you look for a “gelatinous / homiomerous genera”?
Unfortunately, “microscopy” in again a forbidden word, but I preserved a sample and maybe in the future I will back to it.
This must be one of the crustose gelatinous / homiomerous genera. Just scanning the generic key in British Flora, it looks like these are candidates: Porocyphus, Euopsis, Pyrenopsis, Pterygiopsis (of course there are probably half a dozen others, ugh, difficult group!)
Apparently knowing which type of cyanobacterium is present is helpful, as well as number of cells in the spore.
Created: 2013-03-15 11:09:49 AEDT (+1100)
Last modified: 2013-03-15 11:09:55 AEDT (+1100)
Viewed: 33 times, last viewed: 2017-10-09 00:37:42 AEDT (+1100)