24-04-2024 21:54
éric ROMEROBonjour, J'ai trouvé ce Lasiobolus sur laissées
23-04-2024 15:18
Lothar Krieglsteiner... but likely a basidiomycete. I hope it is o.k.
23-04-2024 13:17
Edouard EvangelistiBonjour à tous, Je viens de récolter ce que je
23-04-2024 21:49
Ethan CrensonHello all, A friend recently found this orange as
22-04-2024 11:52
Zuzana Sochorová (Egertová)Hello,I made a loan of a collection of Microstoma
11-01-2022 16:36
Jason KarakehianHi does anyone have a digital copy of Raitviir A (
22-04-2024 20:38
Miguel Ángel RibesGood afternoon.Does anyone know this anamorph?It g
19-04-2024 14:28
B ShelbourneCudoniella tenuispora: Distinctive macro and habit
this fungus was collected by a friend on a dead, corticated branch of Malus. At first I didn't even think that it might be a Pezicula because of the conspicuously dark outside. According to Verkley (1999) there are five taxa on Malus: P. corticola, P. sepium, N. alba, N. malicorticis and M. perennans.
P. corticola apparently comes close but I'm not sure if it can have such a dark outside. Other than that, it seems to fit well.
P. sepium can probably be excluded due to its ascospores having a smaller L/W ratio.
N. alba and N. malicorticis can be excluded due to having different conidia.
N. perennans probably comes closest. Verkley mentions (under N. malicorticis) a darker tissue that lines the discs, maybe that corresponds to our material? Difficult to say without images to compare...
Overall, I think that this collection is either P. corticola or N. perennans, more likely the latter. Does anyone have any experience with this group?
The ascospores measure 19.5-22.5 x 6-8 µm. The images attached to this post show the sexual state. I will show images of the anamorph in the next post.
Best wishes,
Gernot
Thank you!
I think you can exclude Pezicula as longa s Neofabraea is accepted as a separate genus. Indeed the whitish hymenium and dark brown exterior are typical.
This genus seems to be tricky, I have no clue to distinguish these species. Maybe you know by drawing of N. cf. alba (HB 4025) in my Neofabraea folder. the conidia there are much larger than yours, but the ascospores are similar.
There exist sequences of different species, so this could be an approach to come nearer to the truth....
Könntest du mir bitte deine Fotos per Mail schicken, dann spare ich mir das mühsame Herunterladen?
Zotto
thanks a lot for your response. I am already pretty happy to know that this is a Neofabraea rather than a Pezicula.
What still confuses me is that the authors of the following paper write "The apothecia of Neofabraea and Pezicula are similar, but excipular tissues are less differentiated in Neofabraea", since I would estimate that the excipulum of our fungus is rather well-defined, and it looks like this is the case in your N. cf. alba too.
http://www.westerdijkinstitute.nl/images/ResearchGroups/Phytopathology/pdf/2016_Chen_Neofabraea.pdf.
>Ich schicke dir die Fotos gerne, blöderweise hab ich erst kommende Woche wieder Zugriff darauf.
Schöne Grüße
Gernot
I think I collected the same/similiar species and got stuck at the same place as you.
Mine were quite senescent and likely developed in bad conditions.
Nevertheless, the spore size fits, the dark margin as well.
One thing I dont see in your photos is the pruinose margin - crystals were outside and in outermost cells of ect. exc.
Zottos N.alba seems very similiar aswell. I havent seen pycnidia in my sample, will try to look for them.
https://drive.google.com/open?id=1uNj4xkWQvqn90tBy7kI3zA0ve5SmRSqz
thanks for sharing! Our fungus was also collected together with Tympanis alnea, for what it's worth. It would be great if you found conidia in your sample but I do wonder if they are generally still present in senescent material.
Best wishes,
Gernot
Gernot: your link does not work on my computer (server error).