Observation 122470: Acarospora A. Massal.
When: 2012-12-27
Who: zaca
No herbarium specimen

Notes: This observation refers to the lichen with a yellowish/greenish thallus immersed in the thallus of a Diploschistes. No spot tests were done.


2013/02/16 – Revisitation: Not much difference (as expected) to the previous observation;
2013/02/16 – Revisitation: Chemical reactions.

Proposed Names

29% (1)
Recognized by sight
58% (1)
Eye3 Eyes3
Used references: See the notes.
Based on chemical features

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
New data added.
By: zaca
2013-02-17 04:44:18 CST (-0500)

I have information to add on the subject of this observation:

1) I found the book:
Lichens from Central East Greenland
Eric Steen Hansen
9 – 1982
available at google books, where (page 11) the following is written:
“In southern Europe, A. scheicheri often grows parasitically on Diploschistes .. "
and three species of Diploschistes are cited (D. albescens, D. speppicus and D. muscorum).

2) Then I found a photo at Timdal website displaying such parasitic relation;

3) Parasitic relations of Acarospora on Diploschistes are not new to me (see, for instance, observation 89121 where A. nodulosa also parasitizes a Diloschistes);

4) One thing I remembered from my previous observations of A. schleicheri (observation 76534, observation 91211 and observation 103044) is the yellow/green shining of this species. In the photos at the following link that feature is perceptible: Tropicallichens.net schleicheri and should be compared with my photos;

5) After collecting this information I went back to the place of the observation, took new photos and made the spot tests (photos already uploaded);

6) The chemistry seems to be different from what I expected to think of it as A. schleicheri, but this together with the new evidences found nearby (the subject of a forthcomming observation) gives me the conviction that it is an Acarospora. Which one? Is what I’ll like to know!

Created: 2013-01-09 16:51:38 CST (-0500)
Last modified: 2013-02-17 04:45:21 CST (-0500)
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