Accès membres

Mot de passe perdu? S'inscrire

12-12-2019 18:36

Roland Labbé

Bonjours ! Voici un Trichoderma (Hypocrea) inconn

11-12-2019 23:29

Juuso Äikäs

I found these in a Picea abies dominated forest in

14-12-2019 10:09

Marc Detollenaere Marc Detollenaere

Dear forum,   On a decorticated trunk of Populu

13-12-2019 20:42

Götz Palfner Götz Palfner

Bonjour tous,Sorry, but as my French is crap, I wi

11-12-2019 22:21

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous,Pourriez-vous me confirm

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

13-12-2019 16:20

Chris Yeates Chris Yeates

Bonjour tous this is an area I feel rather ignora

12-12-2019 23:42

Maren Kamke Maren Kamke

Hello together, can someone provide me with this

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

11-12-2019 23:25

Ethan Crenson

Hello all,This was found by a friend in New York C

« < 1 2 3 4 5 > »
Crustomollisia roburnea (Velen.) Svr&#269;ek?
Enrique Rubio, 21-05-2009 20:38
Enrique RubioI need your help for determinate this small (0.2-0.3 mm) and erumpent ascomata, spherical and ostiolate, later patellarioids, amber to amber brown, that grew on Betula pubescens overwintered leaves.
What do you think?
  • message #7841
Enrique Rubio, 21-05-2009 20:42
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
I have read in Nauta & Spooner's keys (Mycologist 13 (2) 1999, the genus Crustomollisia has the excipulum covered by yellow-brown amorphous crust as in my images show.
  • message #7842
Enrique Rubio, 21-05-2009 20:43
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
This excipulum has a textura angularis
  • message #7843
Enrique Rubio, 21-05-2009 20:43
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
At 1000 x
  • message #7844
Enrique Rubio, 21-05-2009 20:44
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Spores
  • message #7845
Enrique Rubio, 21-05-2009 20:45
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Asci IKI bb. I hesitate they have (or not) croziers
  • message #7846
Enrique Rubio, 21-05-2009 20:46
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Paraphyses. I have not seen brownish pigment
Many thanks for your help.
Enrique
  • message #7847
Hans-Otto Baral, 21-05-2009 21:15
Hans-Otto Baral
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Dear Enrique

your fungus has many characters in common with Calycellina castanea (= Crustomollisia roburnea) which I know, however, only from Quercus (and a single time from Fagus) leaves. Apart from that, the spores have a higher lipid content in C. castanea, and, above all, the paraphyses are more inflated apically (clavate) and contain in the living state very striking VBs (vacuolar bodies). I assume your paraphyses are alive, but I am not sure. Please try a section with a razor blade and do not apply pressure, it would be important to see the living asci and especially paraphyses.

I attach photos of C. castanea made by Guy Garcia, from Quercus ilex leaves. Please compare also the images on the DVD. Besides, in your photo (ascus on the right) the crozier is very well visible, and this would fit to castanea.

Could you please send me your images in higher resolution, perhaps it helps.

Zotto
  • message #7849
Enrique Rubio, 21-05-2009 21:29
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Dear Zotto:
My fingers are too many 'fat' to try to cut so small thing. It is almost sure, that I will finish cutting my finger. Tomorrow I will look if some paraphyses has the great Vb that you say to me and i will send you my images.
Good night and many thanks
Enrique
Enrique Rubio, 22-05-2009 14:13
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
I have seen any Vb's in the paraphyses. I think my elements are living.
Enrique
  • message #7865
Enrique Rubio, 22-05-2009 14:14
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
More paraphyses
  • message #7866
Hans-Otto Baral, 22-05-2009 17:41
Hans-Otto Baral
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Dear Enrique

I have now an idea, I think it is a Pyrenopeziza! And it seems to be Pyrenopeziza betulicola Fuckel = "Orbilia" betulina (Alb. & Schw.) Höhn = Mollisia betulina (A&S) Rehm. I have examined a syntype of Calloria winteri J. Kunze which is said to be a synonym too (see Hein 1976: 108), but I made no drawing. So this seems the first record in the vital state that I see.

Zotto.
Enrique Rubio, 22-05-2009 18:08
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
It seems a good idea!!. I have read Fuckel's diagnosis ad I think fits well with our fngus. Only I am surprised by a thing: he says that the spores measurent 8 Mik. long and 3 Mik. broad(¿)
Hans-Otto Baral, 22-05-2009 21:43
Hans-Otto Baral
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
I measured 10 x 2 µm in the type of Calloria winteri, but the material was apparently not well developed.

I have a note about spores 8-17 x 2-3.5 µm in an article on "P. betulicola and an anamorphic fungus growing on leaf spots of birch": Paavolainen, L. et al. (2000), Mycol. Res. 104: 611-617. I should have the copy but did not look in it.

Besides, Hein (1976) writes: 9-14 x 2.5-3 µm. So I think, considering the shrinking effect, spore size fits to yours.

Zotto
Enrique Rubio, 22-05-2009 22:09
Enrique Rubio
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Don't worry, Zotto.
I have this article. I think really our fugus is, as you say, P. betulicola.
Many thanks
Stip Helleman, 22-05-2009 23:05
Stip Helleman
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Dear Zotto & Enrique,
I do regard Mollisia tumidila as a synonym who has a sporesize up to 13 mu long, i found this species last year. There are a few things beside the sporelength that does not fit really. this species has a Calycina type of apical apparatus and my collection is a sclerotinia type. the VBs are less refractive, in the Netherlands it seems to be a autmnale species.but the exudate on the excipulum fits well.
http://www.helotiales.nl/Species/Pyrenopeziza_betulicola.html

Cheers Stip
  • message #7890
Hans-Otto Baral, 22-05-2009 23:26
Hans-Otto Baral
Re:Crustomollisia roburnea (Velen.) Svr&#269;ek?
Yes, Stip, this tumidulum is said to be a synonym too. I paste below what I have written on it in the Orbilia monograph because one of the many combinations was in Hyalinia. Good to draw my attention to your collection. I have placed it in Microscypha monticola, another candidate for Pyrenopeziza with hyaline excipular cells. When I look at all I get quite unsure whether this could even be a further synonym of betulicola/betulina, though some of my monticola collections are on Salix leaves. Piotr Perz had recently a collection on Salix and doubts a bit that Stip's find on Betula is the same. Well - not easy! At least the spores I have drawn in my HB 3432a (DVD, Salix) remind me strongly of Enrique's collection. There was often a Venturia or Epipolaeum among the apos, also in Piotr's find.

Zotto

Here my text on tumidula:

Based on a restudy of the type material (France, Caen, leaves of Betula, M. Roberge), Arendholz (1979: 97) considered the species to be closely related to Pyrenopeziza betulicola Fuckel (see above p. ...) if not identical. He further argued that the species would fit in Pyrenopeziza Fuckel because of its ectal excipulum of t. globulosa-angularis, were not the hyaline, somewhat glassy cell walls. So he retained it as “Mollisia tumidula”. White (1943: 165) likewise treated the type material of “Helotium tumidulum” and presented a very precise figure of the hymenial elements while omitting the excipular characters. Both authors have reported the ascus apex as amyloid. The available data do not allow to conclude whether Peziza tumidula should be placed in Pyrenopeziza or Mollisia, or perhaps even in Calycellina, a genus for which, in our opinion, an ectal excipulum with or without gelatinised cell walls should be accepted. For the latter genus the raised apothecial margin covering the hymenium in the dry state does not fit.
According to White, H. tumidulum is only known with certainty from the type collection while most if not all of the material referred to this taxon by later authors has been wrongly identified.