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10-02-2025 16:40

Karen Poulsen

Hello, I found these fungi on dead branches of Fa

09-02-2025 22:51

Yanick BOULANGER

BonsoirEst-ce que quelqu'un peut me dire s'il s'ag

01-02-2025 20:32

Andreas Gminder Andreas Gminder

Hello,today my girlfriend Sylvie found a single ap

08-02-2025 18:48

Yanick BOULANGER

CistellaSur boisTrès petites apothécies (0.1 –

06-02-2025 18:11

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello, while digging in my fungarium, I found an

07-02-2025 22:28

Yanick BOULANGER

BonsoirPetit pyrénomycètes d'environ 1 mm sur bo

07-02-2025 20:25

Enrique Rubio Enrique Rubio

Dear all.Ascomata pheritecioid, KOH-negative, flas

07-02-2025 17:48

Vasileios Kaounas Vasileios Kaounas

asci 170-200 x 20-22 ?m spores 21.9 [22.9 ; 23.4]

06-02-2025 06:25

Bharati Mandapati

Hi All, I would love some help with this Lasiobel

06-02-2025 19:28

Rot Bojan

Hello!On a fallen twig (possibly Corylus) I found

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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