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05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

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Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

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me mandan el material de Galicia (España) recolec

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David Chapados David Chapados

Hi,Does anyone know what could this anamorph be?ht

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Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

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Hello.A fungus growing on the surface of a trunk o

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Josep Torres Josep Torres

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Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

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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