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entire Lichen imersed

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BubikolRamios1
Beiträge: 1137
Registriert: 23.05.2016, 20:49

entire Lichen imersed

Beitrag von BubikolRamios1 » 03.05.2021, 08:38

http://agrozoo.net/jsp/Galery_one_image ... f2c299ac45

Any comment to this lichen (2 lichens ?) ? Did lichen made that flat pit ? There are also rare scattered black perithecia at brown area.
If you/me don't see holes on top of perithecia , probably because they are too small.

On vertical wall, so unlikely water made the pit, also seems edges are to sharp for water.

If black thing C. immersa - i think that name apllays to immersed perithecia not entire thalus, or ?

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abeja
Beiträge: 3131
Registriert: 23.01.2009, 19:04
Wohnort: da, wo D an CH und F grenzt

Re: entire Lichen imersed

Beitrag von abeja » 03.05.2021, 22:29

Hi,
again, I don' t know what this is, but Claudazea immersa has got apothecia ... not perithecia.
In your pictures I can't determine if it is this or that.
If you see that black flat thing with a "thin black persistent proper margin"(and the disc maybe a bit pruinose), then it might be C. immersa.
If there is no margin, then the black things should be perithecia (visible maybe only partly, not really flat, a litte bit like a wart, rounded) - and you have to search in different lichen families.
A good picture of C.i. with the apothecia (flat with margin)
http://www.uklichens.co.uk/species/Clau ... 0small.jpg

The word "immersa" in C.i. is because of immersed apothecia, but the thallus itself might be (fully) endolithic (immersed as well) and "barely visible". I don't know this kind of lichens, so I have difficulties to say, yes endolithic or no, not endolithic, but epilithic.

Here they say: C.i. thallus endolithic
https://www.researchgate.net/figure/Fig ... _257487377
"fully endolithic, poorly evident" (and good description)
http://italic.units.it/index.php?proced ... ge&num=843

I have found just some days ago lichens on calcareous stones, where I was thinking of an endolithic thallus, but nearby I saw the same type of apothecia in a typically cracked surface, so this was a visible thallus and not the stone ... not endolithic, but epilithic (I think so...) .

The thing you are showing looks "strange" ... but I shrug my shoulders ...
Viele Grüße von abeja

BubikolRamios1
Beiträge: 1137
Registriert: 23.05.2016, 20:49

Re: entire Lichen imersed

Beitrag von BubikolRamios1 » 04.05.2021, 04:57

see this: http://agrozoo.net/jsp/Galery_one_image ... 02df51004c
by my memory less imersed, but imersed, not same location, played with original image a bit and extracted lower left owerexposed part (looks like apothecia) ...

Looks pretty much the same as OP image to me .... If it gives any clue

True: all other c. immersa fom my collection (with evident apothecia), are not thalus endolitic.

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