Accès membres

Mot de passe perdu? S'inscrire

17-04-2017 10:06

Bernard CLESSE Bernard CLESSE

Bonjour à tous,Récolté en Forêt Noire (Schwarz

13-04-2017 18:06

Bernard Declercq Bernard Declercq

Dear all,herewith another pyreno collected on deca

17-04-2017 08:48

Angel Pintos Angel Pintos

Lophiostoma quadrinucleatum? Ascomata gregarius,

15-04-2017 18:25

Zoltan Lukacs Zoltan Lukacs

Hi,Spores: 15,12-16,2 x 7,56-8,1 micron.The spores

15-04-2017 06:37

Roland Labbé

Bonjour !J'aimerais savoir si le genre Tolypocladi

29-05-2014 22:21

Luc Bailly Luc Bailly

Bonsoir à tous,Pour vérifier la détermination d

14-04-2017 18:16

Thorben Hülsewig

Hi there,i found under rotten wood, these fungus o

13-04-2017 19:42

Andgelo Mombert Andgelo Mombert

Bonsoir à tous,Je vois sur indexfungorum que Cibo

13-04-2017 21:13

Steve Clements

Bonjour,Nous avons trouvé une Lachnellula avec de

13-04-2017 14:04

Enrique Rubio Enrique Rubio

Hi to everybodyThese minute, pulvinate, broadly se

« < 760 761 762 763 764 > »
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
__________________________________
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).

  • message #48362
  • message #48362
  • message #48362
  • message #48362
  • message #48362
  • message #48362
  • message #48362
  • message #48362
  • message #48362
  • message #48362
  • message #48362
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