Observation 212321: Dirina massiliensis f. sorediata (Müll. Arg.) Taylor

When: 2015-08-08

Collection location: Óbidos, Portugal [Click for map]

Who: zaca

No specimen available

Growing on the walls of a monument.
My interpretation of these photos is the following: there is a sterile lichen, whose thallus is withish and has a circular form, and a parasite (lichenicolous) with black apothecia resembing an Opegrapha spp. . If so, I also have a candidate for the lichen: Dirina massiliensis f. sorediata, since their features fit quite well in that form; after all this is the zone where I found almost all species of Dirina that I observed so far. I wish I had done the spot tests, but that was not “convenient” to do at the place.



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By: zaca
2015-08-10 16:08:29 CDT (-0500)

Looking for information about lichenicolous fungi on Dirina I found a reference in the British Flora (Ref. 1) to an Hyphomycete (i.e. asexual reproductive structures produced directly on their substrate without any kind of enclosing tissues) named Verrucocladisporium dirinae and a photo of this fungus in Ref. 2. Later I found description in Ref. 3. Do to the simililarities with my specimens I thought that “this was it”. However, continuing the search, I also found another hyphomycete, brown to black as well, that is known to live on Dirina spp., namely Milospium graphideorum. This species is described in Ref. 4. Since both mentioned species of lichenicolous fungi can only be separated in terms of their microscopic properties, for a proper identification I need first to get a sample and to analyze it under the microscope, which I intend to do in a forthcoming opportunity.
Consequently, I split the original observation in two, this one for the lichen – Dirina massiliensis f. sorediata – and another (observation 212403) for the lichenicolous fungus, both with the same initial attached photos.

Ref. 1 – British Flora= Smith et al. (Eds.), The Lichens of Great Britain and Ireland, The British Lichen Society, 2nd ed., 2009.

Ref. 2 – Dorset Nature

Ref. 3 – P.W. Crous, U. Braun, K. Schubert and J.Z. Groenewald: Delimiting Cladosporium from morphologically similar genera, Studies in Mycology 58: 33-56, 2007 (available online at www.studiesinmycology.org, doi:10.3114/sim.2007.58.02)

Ref. 4 – P.W. Crous et al.: The Genera of Fungi – fixing the application of the type species of generic names – G 2: Allantophomopsis, Latorua, Macrodiplodiopsis, Macrohilum, Milospium, Protostegia, Pyricularia, Robillarda, Rotula, Septoriella, Torula, and Wojnowicia, IMA Fungus · 6(1): 163–198 (2015) (available online at
http://www.imafungus.org/Issue/61/21.pdf ).

Created: 2015-08-09 19:04:20 CDT (-0500)
Last modified: 2015-08-10 16:12:10 CDT (-0500)
Viewed: 49 times, last viewed: 2018-04-19 14:33:27 CDT (-0500)
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