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11-03-2026 17:36

Help for Genus and Species ID
Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

12-03-2026 19:44

Ostropoloid fungus on Hibiscus
Enrique Rubio Enrique Rubio

Hi to everybody.Can you give me any suggestions ab

08-03-2026 14:05

Helvella lacunosa
Thierry Blondelle Thierry Blondelle

Bonjour à tous,Sur 3 récoltes supposées de H. l

12-03-2026 15:45

Dematioscypha cf. olivacea
Åge Oterhals

Dear forum,I found this small discomycete on a ver

12-03-2026 16:17

Mollisia atlantica
Sylvie Le Goff

Bonjour à tousRécolté dans le 22 en France (ré

12-03-2026 14:37

Octospora
David Wasilewski

These small ascomycota (1-3 mm) ere observed growi

11-03-2026 16:48

Saccobolus minimoides ?
Bruno Coué Bruno Coué

Bonjour, je serais heureux d'avoir votre avis sur

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

11-03-2026 14:14

Scopinella on Dryas octopetala
Gernot Friebes

Hi,I would like to share a collection of Scopinell

15-09-2020 17:27

Thyridaria sp.
Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte décortiquée de Berbe

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Chaetosphaeria sp.
Maren Kamke, 05-05-2014 21:51
Maren KamkeHi everybody,
I found this Chaetosphaeria? species on  wet,  decidious wood, maybe Alnus. Perithecia 0,25 mm wide, superficial, closely packed. ascospores hyaline, (20-24) 22*4,6 (4-5) µm, with high oil content, becoming 3-septate and  developing sidespores (4*1,5 µm),    hyaline, partly allantoid with two oil-drops, one at  each end. Asci 98*7 µm, IKL negative.

Among the perethecia was an anamorph species, with long neck (up to 1450*90 µm, apikal 20 µm), which consists of  long, parallel, light grey hyphae, 2,5 µm wide. The  conidia are hyaline, ovoid (3-4*2 µm). Maybe the anamorph is  a Hyalopycnis. I don't know, if this anamorph-type belongs to Chaetosphaeria.


Regards, Maren

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Eduard Osieck, 05-05-2014 22:55
Re : Chaetosphaeria sp.
This could be Chaetosphaeria pulviscula: see the key by Reblova (Studies in Mycology 45: 149-168; it's on the Internet), she has written also another paper with a detailed description and drawings of this (and other) species: see Reblova 1998, Czech Mycology 50: 161-179 (I can email you a copy, if needed).
But to be 100% sure you need the anamorph (in this case Menispora caesia).
Eduard
Maren Kamke, 06-05-2014 17:04
Maren Kamke
Re : Chaetosphaeria sp.
Hi Eduard,
thank you very much, I've checked the key and the description, it might be C. pulviscula. But without the anamorph it get's a cf-mark of me.
I'm still trying to grow the Anamorph, let's see if that succeeds.
Regards, Maren