13-07-2020 13:17
Blasco Rafael
Hola, a ver si me pueden ayudar con esta muestra d
12-07-2020 19:23
Andgelo Mombert
Bonsoir, Sur bois mort décortiqué, immergé dan
13-07-2020 13:57
Stefan JakobssonHere a 5 mm wide fungus growing on a decidious(?)
12-07-2020 16:30
Gilbert MOYNEBonjour, Une récolte qui me pose quelques problÃ
12-07-2020 17:42
Juuso ÄikäsI found a lot of these growing gregariously on dea
12-07-2020 21:17
Bernard CLESSE
Bonsoir à toutes et à tous,Que pensez-vous de ce
08-07-2020 00:01
Shane JohnI would ask the indulgence of the group to perhaps
08-07-2020 16:47
Chris Yeates
Bonjour tous While searching for the downy mildew
Pithyella frullaniae ?
Marcel Heyligen,
01-02-2020 18:48
Found not on Frullaniae but on Orthotrichum affine on a tree. Ascomata apothecioid, 290-450µm, pale ocher to almost white, no stalk, sessile. Tracks 3.75-5.15 x 3.44-4.55 µm (n = 27). asci 48.90-71.36 x 6.55-8.73µm, croziers, Lugol negative, unitunicate and bitunicate.My first thought was Pithyella frullaniae but the mc is not really correct
Can someone give me advice.
Thanks in advance
Marcel
Hans-Otto Baral,
01-02-2020 20:58
Re : Pithyella frullaniae ?
Hi Marcel
The term bitunicate is not appropriate, because in case you saw a wall thickening (in dead asci?) it does not separate from the outer wall layer.
In fact the spores are too large and only indistinctly rough, also the asci are too large, especially to long.
The tropical Pithyella apicalis has a similar spore size but even more pronounced spore warts.
You can see in my folder there is also an ovoid-spored "apicalis" on Neckera. So it seems there is a group of little known species.
Did you study the hairs, are they rough or perhaps curved?
Jean-Paul Priou renamed P. frullaniae to P. chalaudii - not sure why, because I think the invalid name frullaniae could have been validated. Oddly enough he did not illustrate his new holotype made in the type forest, describing it with 2.5-4.5 µm large (sub)globose, more or less warted spores, whereby 4.5 µm sounds to me too large for this species on Frullania. Chalaud said 2.2-2.5 µm diam. for dad spores, smooth, and I found 2.5-3.4 x 2.5-3 µm for living spores.
Zotto
Marcel Heyligen,
01-02-2020 23:40
Re : Pithyella frullaniae ?
Thank you, Zotto
I don't have any photos of the hair and the material has been dried for more than a month, too bad.
I cannot find the ovoid-spored "apicalis" on Neckera in your folder.
Thanks again for your help.
With kind regards
Marcel
I don't have any photos of the hair and the material has been dried for more than a month, too bad.
I cannot find the ovoid-spored "apicalis" on Neckera in your folder.
Thanks again for your help.
With kind regards
Marcel
Hans-Otto Baral,
02-02-2020 09:52
Re : Pithyella frullaniae ?
o.k. Have you been in the 5a Helotiaceae folder? The subfolder is Calyptellopsis - Pithyella, and here "apicalis ovoid Neckera".
Marcel Heyligen,
02-02-2020 20:46
Re : Pithyella frullaniae ?
ok i found it. It takes some searching to get to know the system of your folder. Thank you for including my find in your folder so that it will certainly not be lost. thank you again for your help. Marcel
Hans Meulenbelt,
03-02-2020 13:08
Re : Pithyella frullaniae ?
Hello Zotto,
if you mention folders, I guess you refer to your DVD. Is Your DVD still available?
Regards, Hans.
Hans-Otto Baral,
03-02-2020 14:56
Re : Pithyella frullaniae ?
Hi Hans
indeed it is online accessible.
At present it works only this way:
whereas usually it is
Go to Ascomycetes illustrations.
Good luck!
Zotto
Hans Meulenbelt,
03-02-2020 16:19
Re : Pithyella frullaniae ?
Thanks a lot, Zotto.
I had been trying the "usual" link, without success.
Marcel Heyligen,
03-02-2020 23:43
Re : Pithyella frullaniae ?
Hans-Otto Baral,
03-02-2020 23:55
Re : Pithyella frullaniae ?
This is good, thanks :-)