Observation 69278: Rinodina

When: 2011-06-13

Collection location: Matinha de Queluz, Sintra, Portugal [Click for map]

Who: zaca

No specimen available


Apothecial section
Spores in ascus. Spores length less than 10 µm.

Proposed Names

29% (1)
Based on chemical features: C- (C+light brown on apothecia); K+ yellow (weak); KC+ yellow

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= Observer’s choice
= Current consensus


Add Comment
The problem with Lecanora …
By: zaca
2011-06-16 01:00:13 EEST (+0300)

… is more or less the same that with Teprhomela atra. To my knowledgeThe potential candidate is L. gangaleoides, which as a much more wrinkled thallus than my specimen. Moreover, I believe that the spores are 1-septate. At least I could see that in the microscope, althought the photos are quite bad. Anyhow, I upload two photos where this “can be seen” for the bigger spores, which nevertheless are very small, and those spores are a bit constricted at septum .

Congo red
By: Jason Hollinger (jason)
2011-06-15 21:13:21 EEST (+0300)

Of course, that makes sense. So much for Tephromela! :)

Still, worth considering Lecanora, too, despite the black apothecia. At least until you see an obviously brown spore with obvious septum and oddly-shaped lumina.

OK, it’s a possibility,
By: zaca
2011-06-15 18:37:55 EEST (+0300)

but I think that the thallus of T. atra is much more wrinkled than in this specimen, which is almost flat. Moreover, the hymenium of T. atra is red wine coloured, and the red colour of the hymenium of this specimen I believe is due to the congo-red in the preparation .

You don’t think this is Tephromela atra?
By: Jason Hollinger (jason)
2011-06-15 18:15:43 EEST (+0300)

Sorry, I don’t have my references at hand. I’m sure you’ve already considered the possibility. I’m mostly concerned because it looks like your spores are colorless and nonseptate (admittedly, they are immature and obscured by the hymenium here).

Created: 2011-06-15 16:21:36 EEST (+0300)
Last modified: 2011-06-15 16:21:36 EEST (+0300)
Viewed: 60 times, last viewed: 2019-02-13 17:58:25 EET (+0200)
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