01-03-2026 18:46
Robin Isaksson
Hi!This species i se from time to time in the earl
01-03-2026 08:55
Michel Hairaud
Bonjour , Je souhaiterais recevoir cet article :Â
01-03-2026 15:31
Csaba Németh
Hello!I found these apothecia on Homalothecium lue
01-03-2026 18:02
Francois Guay
I found this mystery Helotiales on an incubated le
01-03-2026 17:51
Bruno Coué
Bonjour,sur vieilles crottes de sanglier en chambr
27-02-2026 17:51
Michel Hairaud
Bonjour, Quelqu'un peut il me donner un conseil p
01-03-2026 14:10
Antonio Couceiro
Hola, me gustaria conocer opiniones sobre este tem
19-02-2026 17:49
Salvador Emilio JoseHola buenas tardes!! Necesito ayuda para la ident
Small Hymenoscyphus on Robinia petioles
Manak Roman,
08-01-2019 19:43
Hi all,
in December, I found small Hymenoscyphus on old petioles of Robinia pseudoacacia. Frutibodies had a diameter around 1 mm (the biggest one 1,5 mm) and similar height. The young fruitbodies was yellow, elderly was lighter.
Asci without croziers, IKI+, Mlz+ (without KOH pretreatment), 90-112×7,7-10,7 µm, spores 16,6-24,5×3,7-5,6 µm (measured in fresh state).
Do not you have any tip?
Thanks
Roman
Hans-Otto Baral,
08-01-2019 20:23
Re : Small Hymenoscyphus on Robinia petioles
My guess is H. scutula. A blackish stroma seems to be absent, and spore size looks good. very short setulae seem to be present.
Living paraphyses you did not study?
Living paraphyses you did not study?
Bernard Declercq,
09-01-2019 15:18
Re : Small Hymenoscyphus on Robinia petioles
Hi Roman and Zotto,
Based on ascus length a typical H. vitellinus, which I collected a.o. on petioles of Fraxinus. But I do not know if molecular studies accepted H. vitellinus and H. scutula being separate species.
Bernard
Hans-Otto Baral,
09-01-2019 16:37
Re : Small Hymenoscyphus on Robinia petioles
Hi Bernard!
Molecular studies on Hymenosc. scutula are sparse!
Chinese H. scutula (KC416308, KC416309) is Cyathicula coronata (!)
Japanese H. scutula (AB926114) might be good, or more probablyÂ
New York (small town Cuba) H. scutula (KC481695), which has 10 nt distance from the next:
Swiss sample (ZT 4292) not in GenBank which is very close to a Netherlands sample in CBS 101.66
And that's it!
Zotto
Molecular studies on Hymenosc. scutula are sparse!
Chinese H. scutula (KC416308, KC416309) is Cyathicula coronata (!)
Japanese H. scutula (AB926114) might be good, or more probablyÂ
New York (small town Cuba) H. scutula (KC481695), which has 10 nt distance from the next:
Swiss sample (ZT 4292) not in GenBank which is very close to a Netherlands sample in CBS 101.66
And that's it!
Zotto
Manak Roman,
09-01-2019 19:24
Re : Small Hymenoscyphus on Robinia petioles
Hi Zotto and Bernard,
thank you. My first opinion was Hymenoscyphus scutula too. But in the Beranrd's key is written that apos should have reddening. I did not notice that.
Zotto, I'm sorry, but I forgot to thoroughly explore paraphyses.
Roman
Hans-Otto Baral,
09-01-2019 20:29
Re : Small Hymenoscyphus on Robinia petioles
Reddening is a consequence of the presence of striking VB-guttules in the paraphyses, and in most typical Hymenoscyphus species they occur. I think your seond photo shows a reddish hymenium.
Manak Roman,
11-01-2019 20:36
Re : Small Hymenoscyphus on Robinia petioles
Zotto,
thank you for your explanation. There is a hint of redness on a larger picture.
Roman