15-10-2025 16:39
Edvin Johannesen
These tiny (0.2-0.6 mm), white, pulvinate apotheci
03-10-2025 13:44
Riet van Oosten
Hello, Found by Laurens van der Linde on Populus
13-10-2025 19:05
Louis DENYBonjour forumSur tronc décortiqué de feuillu x,
11-10-2025 20:27
Marcel Heyligen
Found on a barked branch, 14 mm in diameter, of Ro
09-10-2025 22:14
S. RebeccaWe just had the Bavarian Mycology Conference in Au
10-10-2025 00:49
Ethan CrensonHello all, This was found last weekend on a hardw
04-10-2025 02:13
Francois Guay
Hi everyone, I found this Hymenoscyphus growi
Arnium macrotheca
Joop van der Lee,
12-07-2013 09:21
Perithecia 0.48-0.58x0.41-0.46 mm, neck covered with tufs of rigid agglutinated as well as single, non straight, septated, thick-walled hairs (2.45-2.65 um wide) with rounded tops. Tufs range between 159 and 340 um.Asci: 8-spored, 190.52-204.37x47.72-58.88 um (without the stipe), broad with long thin stipe (up to 122.96 um).
Spores: Broadly elliptical, thick-walled, with germ pore (2.58 um), uniseriate when young in a diagonal position, when mature uniseriate at top and bottom and biseriate in the middle. 46.45-46.85x25.68-26.93 um.
Spores do not have a pedicel and lacking caudae.
Michel Delpont,
12-07-2013 10:52
Re : Unkown asco on horse dung
Salut Joop.
Certainement Arnium macrotheca. Il me semble voir sur certaines spores une étroite enveloppe gélatineuse. Elle est difficile à voir, essaye d'autres préparations avec un colorant différent. Les dimensions correspondent ainsi que les poils au sommet.
Michel.
Certainement Arnium macrotheca. Il me semble voir sur certaines spores une étroite enveloppe gélatineuse. Elle est difficile à voir, essaye d'autres préparations avec un colorant différent. Les dimensions correspondent ainsi que les poils au sommet.
Michel.
Joop van der Lee,
12-07-2013 10:57
Re : Unkown asco on horse dung
Merci Michel,
Can I use cotton blue when looking for the gelatineus sheath or do you prefer another colorant?
Joop
Can I use cotton blue when looking for the gelatineus sheath or do you prefer another colorant?
Joop
Michel Delpont,
12-07-2013 11:11
Re : Unkown asco on horse dung
Try with diluted ink or black chlorazol.
Michel
Michel
Joop van der Lee,
28-07-2013 22:46
Re : Unkown asco on horse dung
Here is your gelatineus sheath Michel, I used Cottonblue. I also discoverd large de Bary Bubbles measuring 24.98-25.18x17.59-18.11 um
Michel Delpont,
29-07-2013 08:55
Re : Unkown asco on horse dung
Hello Joop.
Your first photo seems to confirm Arnium macrotheca we see the gelatineus sheath.
Michel.
Your first photo seems to confirm Arnium macrotheca we see the gelatineus sheath.
Michel.
Joop van der Lee,
29-07-2013 13:55
Re : Unkown asco on horse dung
Mercdi Michel
Norbert Heine,
29-07-2013 17:51
Re : Unkown asco on horse dung
Hello Joop & Michel,
this interesting species seems to be rare in Germany. I saw it only three times, all gatherings on old horse dung. Actually it's growing in moist chamber!
Half year ago I did a little portrait at Pilzforum.eu, sorry only in german!
The spores are in Indian Ink.
If you want, you can have a look at it here:
http://www.pilzforum.eu/board/thema-arnium-macrotheca
Maybe that you can't see the nice pictures by Rada, therefore you have to be registered :-(
Norbert
this interesting species seems to be rare in Germany. I saw it only three times, all gatherings on old horse dung. Actually it's growing in moist chamber!
Half year ago I did a little portrait at Pilzforum.eu, sorry only in german!
The spores are in Indian Ink.
If you want, you can have a look at it here:
http://www.pilzforum.eu/board/thema-arnium-macrotheca
Maybe that you can't see the nice pictures by Rada, therefore you have to be registered :-(
Norbert
Joop van der Lee,
29-07-2013 18:02
Re : Unkown asco on horse dung
Hello Norbert,
I have a little piece of horse dung in culture (10x10 cm) and so far I have had 15 species and still growing.
Joop
I have a little piece of horse dung in culture (10x10 cm) and so far I have had 15 species and still growing.
Joop
Michel Delpont,
29-07-2013 20:23
Re : Unkown asco on horse dung
Hello Norbert and Joop.
Norbert thank you for the link, it works! I found several times Arnium macrotheca or on horse dung, or on cow dung , but still in a humid chamber.
Regards.
Michel.
Norbert thank you for the link, it works! I found several times Arnium macrotheca or on horse dung, or on cow dung , but still in a humid chamber.
Regards.
Michel.
