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25-03-2026 10:35

Hulda Caroline Holte

Hello,I collected this species growing on a dead b

26-03-2026 15:31

Ãke Widgren Åke Widgren

Hello,I found this one in October last year, on r

26-03-2026 12:50

David Chapados David Chapados

Hi,I'm having a hard time figuring which Pseudombr

26-03-2026 11:17

Vasileios Kaounas Vasileios Kaounas

Found 11-03-26, in leaf of Ulmus sp. Diameter 2-4

25-03-2026 22:23

Marc Detollenaere Marc Detollenaere

Dear Forum,On a debarked stem of Tilia, we found s

24-03-2026 15:44

Åge Oterhals

I hope someone can confirm the name of this collec

25-03-2026 20:53

François Bartholomeeusen

Dear forum members,On 23 March 2026, I found sever

23-03-2026 20:16

Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningI'm unable to identify this Coprotus o

25-03-2026 15:06

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me confirm

25-03-2026 13:54

Enrique Rubio Enrique Rubio

Does anyone know where I could download Paoletti's

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Nectria on polypore?
Amadej Trnkoczy, 06-04-2017 22:29
Amadej TrnkoczyHi to everyone,

I found this small (probably) asco on heavily decayed Polyporaceae (Phellinus punctatus and Inonotus nodulosus most common at this place) on fallen off, rotten branch of Fagus sylvatica. First I thought I found Nectria peziza (since on polypore). However, spores seem too big and too verrucose. Also perithecia seem pyriforme rather than globose and they apparently do not degrade to widely open 'peziza' type cups when old as I expected. Surprisingly I was unable to find asci? In the literature available to me I found no fit to this find.

Would appreciate if somebody could help me by instructing me where to look for further information or how to proceed to come up with an identification? Many thanks in advance.

Amadej Trnkoczy
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Date of find: March 25. 2017
Place: Zadnjica valley west of Mt. Triglav, East Julian Alps, northwest Slovenia.
Habitat: alpine Fagus sylvatica forest with some Picea abies; in shade, rather cool and humid place; elevation 950 m, average temperature 5 -7 deg C, average precipitations ~ 3.000 mm/year, alpine phytogeographical region.
Spore dimensions: 14.3 [16.5 ; 17.6] 19.8 x 8.6 [10.2 ; 11] 12.6 microns; Q = 1.3 [1.6 ; 1.7] 1.9; N = 24; C = 95%; Me = 17 x 10.6 microns; Qe = 1.6.
I observed also much smaller, numerous (probably) conidia of some kind (Pic.: 8).

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Gernot Friebes, 07-04-2017 00:00
Re : Nectria on polypore?
Hi Amadej,

this could be Cosmospora coccinea/Nectria cosmariospora – a common species on old fruitbodies of Inonotus.

Best wishes,
Gernot
Thomas Læssøe, 07-04-2017 07:56
Re : Nectria on polypore?
In Denmark, Mensularia (Inonocuts) nodulosus is by far the most common host for Cosmospora coccinea (with some on Mensularia radiata  - never on other Inonotus s.l.)

cheers
Amadej Trnkoczy, 08-04-2017 10:30
Amadej Trnkoczy
Re : Nectria on polypore?
Dear Gernot and Thomas,

Thank you very much for your input. I browsed the information available on web for the name you proposed and it fits well to my observation. One question more: is it possible that my picture no.8 shows (micro?) conidia of anamorph form of the find - Verticillium olivaceum? Or they belong to something different? Reference Gräfenhan T, Schroers HJ, Nirenberg HI, Seifert KA, An overview of the taxonomy, phylogeny, and typification of nectriaceous fungi in Cosmospora, Acremonium, Fusarium, Stilbella, and Volutellastates (2011), Stud Mycol.; 68: 79-113. states: " ... Microconidia ellipsoidal, oblong or clavate or slightly allantoid, aseptate, in slimy heads... " but no dimensions are given. I was also unable to find some pictures of them.


Regards
Amadej