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18-07-2025 23:03

Help with some conidia.
Josep Torres Josep Torres

Hello.Fruitings between 51 and 130 microns in tota

17-07-2025 11:55

Una para ID 833
Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y abetos, en tieraEjemp

16-07-2025 17:34

Sphaerulina cornicola versus Septoria cornina
Bernard Declercq Bernard Declercq

Hello,I have trouble distinguishing above mention

14-07-2025 11:20

Une hélotiale sur Sphagnum palustre
Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

15-07-2025 13:27

literature request
Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

16-01-2023 21:31

Troposporella fumosum => Troposporella monilipes
Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Hypoxylon cf ticinense
Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Jackrogersella minutella VS Hypoxylon cohaerens var. microsporum
Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Olla aff. millepunctata (croziers +) on Rubus idaeus
Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Rutstroemia ulmariae(?) on Saxifraga rotundifolia
Gernot Friebes

Hi,do you think this collection could be R. ulmari

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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