Dear all,
I would like to have more opinions about this asco, that was growing on the thallus of a lichen (of the genus Graphis), as can be observed from the first photo attached. In addition there was another parasite with similar appearance over the lichen. I was doing the microscopy of the lichen and noticed some stranges spores. Then I selected a emerging volcano and made some sections of it. From the shape of the ascospores I immediatly thought that could be a Hysterium sp.. When I measured the spores I got a surprise, the size was about the double than expected (in average 52.4 x 12.8 µm). I went to the key of Eric Boehm, available at
http://www.eboehm.com/hysterium.html
and arrived to Hysterium macrosporum. Since till now I found only two Hysterium species: H. angustatum and H. pulicarea and, according to the description given in the above website, H. macrosporum it is a very rare species, I became doubtful. Is there any other suggestion?
Thank you in advance,
zaca