Observation 99940: Dirina ceratoniae (Ach.) Fr.
When: 2012-07-07
Collection location: Peniche, Portugal [Click for map]
Who: zaca
No herbarium specimen
0 Sequences

This was a(nother) big surprise. These specimens grew on the shrubs envolving the place of my previous observation of Dirina massiliensis (see observation 99463). In the field I thought that could be some Ochrolechia sp.. However, the similarity of the apothecia with D. massiliensis was such that make me wonder if it was the same or a closed related species. It is convenient to recall that D. massiliensis grows (only) on rock and that the thallus of these specimens living on shrubs is greyish-green with a whitish prothallus, darker in young specimens. The spot tests where also very similar to those obtained with D. massiliensis. But many Ochrolechia sp. can have such C+ and KC+ red reactions.
Looking for more information about Dirina spp. I found a species that I think must be the one to which these specimens belong: D. ceratoniae. Unfortunately I could not find a good description of it but I found plenty of photographs, available at the following links:
dbiodbs, lenaturalist, biodiversidadvirtual (at the bottom of the page one can have access to the other specimens in the database).
The world distribution of this species is confined to Mediterranean countries: Spain, Greece, Morocco, Turkey, France, Italy.
Finally, having my bad microscope “back to life” I made the microscopy, which completely rules out Ochrolechia and confirms the similarity with Dirina massilliensis. In particular, the spores are hialine, fusiform mostly encurved, 3-septate.


Chemical reactions;
The young ones;
Detail of a young one.

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Great work!
By: Jason Hollinger (jason)
2012-07-10 22:03:19 CEST (+0200)

This is a good one, by the way, to practice recognizing Trentepohlia.

Created: 2012-07-10 20:56:01 CEST (+0200)
Last modified: 2012-07-10 20:56:02 CEST (+0200)
Viewed: 72 times, last viewed: 2017-08-12 17:17:00 CEST (+0200)
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