Observation 242212: Polysporina

When: 2016-06-04

Collection location: Serra de São Mamede, Portugal [Click for map]

Who: zaca

No specimen available

Growing on sandstone.


Microscopy: Asci-2 (in Phloxine);
Chemical reactions.
Microscopy: Apothecial sections;
Microscopy: Asci-1 (in Phloxine);
Microscopy: Asci-3 (in Phloxine, x1000);
Microscopy: Spores (in Phloxine, x1000).

Proposed Names

29% (1)
Recognized by sight
58% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
By: zaca
2017-09-17 08:28:51 CDT (-0400)

Acarospora “simplex” s. lato was the name suggested by Kerry Knudsen for this specimen, since he thinks that the taxa in Polysporina need a revision and probably part of it may belong to Acarospora.

I agree
By: J-Dar
2016-06-24 09:30:40 CDT (-0400)

those tissues in my photos must be something other than carbonized columns. I’m certainly not doubting your notes that you have all one species, the photos only give me a snap shot for viewing where you have the real thing in hand that makes it much easier to fit the puzzle together!

I´m not certain, but
By: zaca
2016-06-24 06:34:13 CDT (-0400)
it seems highly probable that it is all the same species. It was a continuous with accumulation point at the place where the first photo was taken. Each piece looking like an apothecium is in fact an assemblage of litle ones. If it matters, the sample is from the place of the second photo, where the apothecia are more dispersed.

I will not atribute any significant taxonomical value to the structures like those in your observation 242352. I have found similar things in the microscopy of very different species and I interpret them as starting parasitic by some fungi. They look like regular hyphae and not carbonized tissues.

Sterile Carbonized Columns of Tissue in Apothecial Disk
By: J-Dar
2016-06-23 22:33:10 CDT (-0400)

Brodo et al. use this description as a key character separating Polysporina from Sarcogyne (couplet 66 in the revised and expanded keys to NA lichens). However Nash Sonoran Flora doesn’t mention it. I just went through this routine and, like you, came out unconvinced either way.

See observation 242352, I photographed some structures in an apothecia (was not present in every one, however) that I wondered if they were the carbonized columns of tissue described for Polysporina. You seen this feature before? You sure that the photo of the apothecia lined up in the cracks is the same taxon as the one with dispersed apothecia? The umbonate roughened apothecia is also described as a key feature for Polysporina, but I’m not sure about that one. Seems too easy to call everything with a flat apothecia Sarcogyne.

Microscopy added; How to decide?
By: zaca
2016-06-23 16:33:21 CDT (-0400)