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14-02-2025 23:15

Tomaz Vucko Tomaz Vucko

Hy! Last one for today.How would you identify thi

14-02-2025 21:55

Alan Smith

hello there, this host is a dead stem of Chamerion

14-02-2025 20:15

Tomaz Vucko Tomaz Vucko

Hello! Another species found in the same place as

14-02-2025 19:15

Tomaz Vucko Tomaz Vucko

Hello!I am trying to identify some of the unidenti

14-02-2025 18:31

Francois Guay Francois Guay

Here’s an interesting unidentified ascomycete I

14-02-2025 16:00

Lothar Krieglsteiner Lothar Krieglsteiner

during a workshop on corticiaceous fungi this was

13-02-2025 07:41

Vasileios Kaounas Vasileios Kaounas

first time I encounter it. I didn't expect to see

14-02-2025 12:57

Gernot Friebes

Hello,we are looking for ideas regarding this pyre

14-02-2025 00:22

Jorian Eijkelboom Jorian Eijkelboom

On 6 february 2025 i stumbled upon a leafspot on P

13-02-2025 22:39

Yanick BOULANGER

BonsoirPetits périthèces noirs d'environ 0.5 mm

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Fungus on Euonymus japonicus
Enrique Rubio, 17-01-2025 12:36
Enrique RubioDear friends.

This fungus was growing on dead terminal branches of Euonymus japonicus still attached to the bush. The gregarious perithecia are borne on the bark, not on the wood, inside very inconspicuous stromata, usually single or rarely in groups of two, with short necks with barely emerging ostioles. The asci are cylindrical and unitunicate, with a short stipe and a conspicuous subapical euamyloid ring, bluish in Melzer. The paraphyses are abundant and often contain refractive vacuoles. Its eight ellipsoidal ascospores are brownish at maturity, with high lipid content, some of them papillate and perhaps with an apical pore, with an adherent perispore that seems to disintegrate in the equatorial region of the ascospore where they may germinate. The pigmentation of the spore seems to be diluted in the equatorial region, forming a lighter band that is better seen in Melzer as it hides the guttules inside the spore. At this equatorial region of the spore, the walls become so weakened that the spore seem to be disintegrating. In Indian ink, a wide, irregular sheath can be seen surrounding the spore.
I don't have a precise idea about the genus to which this fungus might belong, but perhaps it could have some similarity with Fasciatispora or Amphisphaerella.
The truth is that I am very confused. Any ideas would be welcome.
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Jacques Fournier, 17-01-2025 20:50
Jacques Fournier
Re : Fungus on Euonymus japonicus
Hola Enrique, great find indeed!
I agree it fits well Fasciatispora, so far a tropical genus. References to known species are in Lu & Hyde 2000, monograph of Anthostomella.
I can scan and send you the relevant pages if you need.
Best,
Jacques

Enrique Rubio, 17-01-2025 22:13
Enrique Rubio
Re : Fungus on Euonymus japonicus
Thank you, Jacques. You always come to the rescue!
I have all those references you tell me about, but thank you for your generous offer.
With my best regards.