29-03-2025 09:08
Martine Vandeplanque
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30-03-2025 10:24
Gonzalez Garcia MartaGood morning, I would like to know the opinion of
31-03-2025 17:01
akcay mustafa emreHello everyone, My name is Mustafa Emre Akçay, a
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Castillo Joseba
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24-03-2025 21:26
éric ROMERO
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29-03-2025 06:21
Francois Guay
Hi! I found this interesting tiny ascomycete on i
29-03-2025 05:45
Sebastien BassoHello, I'm conducting a mycological inventory in
27-03-2025 22:25
carl van den broeck
On Metzgeria furcata I found hundreds of small whi
On Thursday, during a seminar, we found a nice lichens with rosy-pink-lilac-brown apothecia in moist stage, in dry stage more ochraceous - on the bark of a living tree, likely Fraxinus, in Germany, Baden-Württemberg, Schwäbischer Wald near Gschwend-Schönberg, Osterbachtal.
I compared pictures and found Mycobilimbia sphaeroides very similar. Under the microscope I found spores of the right shape and form, but most of them are only 1-septate and not 3-5-septate as indicated in Wirth, for instance.
Is it M. sphaeroides anyway or does somebody have a better suggestion?
The paraphyses are guttulate in living stage, as are the spores. The asci seem to be fissitunicate and stain strongly blue with IKI. The first 4 micro-fotos are in water, the next two in IKI, the last two in KOH.
Regards from Lothar
Mycobilimbia pilularis fits quite well, since the macro coincides with your description and the spores are predominantly 1-septate, fusiform-ellipsoid, with dimensions (9.5-)11.5-13.9(-17) x (3.0)4.2-4.3(-5)um. In addition, it uses to grow on Fraxinus and Quercus (maybe others).
Have a look at
http://www.irishlichens.ie/pages-lichen/l-356.html
Best regards,
zaca
Hi Zaca,
thank you very much for your rapid answer!
In Wirth (1995 - "Die Flechten Baden-Württembergs") M. pilularis (Körber) Hepp is included as a synonym in M. sphaeroides (Dickson).
In Wirth (1980 - "Flechtenflora" - UTB Ulmer) a "pilularis" is not included, and Bacidia sphaeroides (Dickson) Zahlbr. is keyed out (page 131) with "sp. 4(-6)-celled, 12-25/4-7"
I do not have further literature on this topic.
So what?
Best regards from Lothar
I just looked in Index of Fungi
Biatora sphaeroides = Mycobilimbia pilularis
Hi Zaca,
where do you take the information about predominantly 1-septate spores? I do not find this on "Irishlichens". Am I only blind? ...
Thanks and best regards, Lothar
The Lichens of Great Britain and Ireland, Smith et al., 2009, BLS;
where Bacidia sphaeroides does not appear. I'm not very familiar with these species, so I can not say anything valuable.
Good luck,
zaca
Hi Zaca,
thank you very much anyway.
I jus found another book in my library :-):
Dobson, F.S. (2011, 6th edition): Lichens. An illustrated guid to the British and Irish species.
So - there I find (on page 281): Mycobilimbia pilularis (= Biatora sphaeroides). And the text: "Spores 1-septate (with a few older spores 3-septate)."
I can find my specimen within this :-)
So I think the determination can be kept - but still I do not know what name is to be used ...
Best regards from Lothar
Best regards, Lothar