Observation 102448: Caloplaca teicholyta (Ach.) J. Steiner
When: 2012-07-22
Who: zaca
No herbarium specimen

Notes: Apart from the initial perplexity, I conclude that there were two mixed lichens: the one with yellowish thallus, a Fulgensia, and the other with grayish thallus, the subject of this obervation. Both have redish apothecia with whitish margin, the former bigger and slightly convex and the latter flat ou even depressed. After looking for information, I came to the conclusion that probably the grayish one should belong to the genus Haematomma or a close genera. Going further, I found that the genus Ophiofarma has a species, O. ventosa, with these characteristics (Haematomma ventosa is a synonym). According lastdragon
there are two forms: f. ventosa with a cream to yellow-grey thallus, usually found in rock (see some very good photos at Stridvall) and f. subfestiva with a pale to dark grey grey thallus, that is considered saxicolous. I think that my specimens are of f. subfestiva.
The chemical reactions were done in simultaneous for the two lichen on the photos and the results could be influenced by the K purple reaction of Fulgensia.
I hope to confirm this identification with microscopic data as soon as possible.

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Thanks, Richard, for your interest in this observation.
By: zaca
2012-08-30 22:07:56 CEST (+0200)

I can’t say many more about it, due to my limitations in terms of equipment, but besides the initial surprise now I’m convinced that this is a Caloplaca: what else could be with polaricular spores? My surprise was mainly related with the greyish thick thallus, that I never saw in that genus. In the meantime, I could see some photos of the species Caloplaca epithalina presenting a similar thallus (see Timdal webpage and select that species). Another similar example is provided by the species C. percrocata (see botanika). Maybe there are others that I never heard of.

By: Richard Droker (wanderflechten)
2012-08-30 04:06:51 CEST (+0200)

look forward to your identification

Sorry, not thinking clearly
By: Jason Hollinger (jason)
2012-07-24 02:43:22 CEST (+0200)

MO says “no herbarium specimen”, but obviously you have a specimen or yuo couldn’t have done the microscopy! Just momentarily confused…

Jason, what do you mean by:
By: zaca
2012-07-24 00:40:35 CEST (+0200)

“Will you be returning to that place some day to make a specimen?”
I have the only fertile specimen I saw!

Confirmed mystery
By: Jason Hollinger (jason)
2012-07-24 00:23:19 CEST (+0200)

Will you be returning to that place some day to make a specimen?

C. Wetmore is the acknowledged expert for the genus in North America. It looks like J. Vondrák might be the one to contact for Europe? (Just did a list of literature on Caloplaca from last 5 years, and that name comes up very frequently in connection to Europe.)

Of course, there are guaranteed to be species of Caloplaca present in the Iberian Peninsula which are not covered in North America (Sharnoff) or northern Europe (Stridvall), too.

Strange names you found, Jason.
By: zaca
2012-07-23 22:35:14 CEST (+0200)

Many of them never heard and can’t find any information on them. Maybe, at the end, this is a Caloplaca. But, I already saw the very good galleries at “Stridvall”: and “Sharnoff photos” and nothing similar cames out. By the way, Caloplaca cerina var. chloroleuca is supposed to have yellow/orange apothecia with margin concolor with thallus and to be corticolous (?). So, no way. One more lichen mistery?

Polarlocular spores
By: Jason Hollinger (jason)
2012-07-23 20:55:46 CEST (+0200)

Yes, I believe they are unique to the Teloschistaceae. According to Myconet, it includes:

Cephalophysis (?)
Huea (?)
Ioplaca (?)
Josefpoeltia (?)
Seirophora (fruticose, used to be part of Teloschistes)
Xanthodactylon (?)
Xanthopeltis (?)

I’ve never heard of many of these! British Flora only has a few species on soil. Two are rare alpine/arctic things, the other Caloplaca cerina var. chloroleuca (scurfy green-grey thallus).

180º turn?
By: zaca
2012-07-23 19:54:36 CEST (+0200)

The microscopy didn’t confirm my previous guess of Ophioparma ventosa. Instead I observed that the epithecium turn red with NH4OH (which I think is similar to KOH in this respect) and the spores are polaricular, some with a considerable isthmus, with approximate dimensions of 16 × 8 µm. As far as I remember, few genera have this type of spores: Caloplaca, Xanthoria and how many more?
Clearly Xanthoria is out of question and it is hard to believe that it could be a Caloplaca. So, I´m lost!

Created: 2012-07-23 00:36:32 CEST (+0200)
Last modified: 2016-03-17 20:20:24 CET (+0100)
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