For me this is Calycellina leucella. When you make a plate of it I would be pleased to receive it.

Thanks
Zotto

Hi Zotto. Thanks for your opinion. At the same place, but on Betula leaves, I think that I have found the typical Calycellina leucella with strangulate broader ascospores and a very different type, obtuse, of marginal cells. Really do you think they are the same fungus?

 

I send you the images at higher resolution

Were they macroscopically similar? I remember that C. leucella is very variable, and also i remember these spore width differences. Correlated with this you have a difference in ascus width, and it would be helpful to give a range for this in the Betula collection. Does ascus width overlap? Are different apothecia of a population constant?

These protrudin marginal cells I know, but it would not be easy to check all my observations for a correlation perhaps with the substrate.

Zotto

Macroscopically they are somewhat similar but I think leucella is more gelatinized (allways I took it for an Allophylaria species!). The asci are broader in leucella (x 9-10) and I think the ascospore morphology is very different: 'calycinoide' or strangulate in leucella vs scutuloid in this other.

I recommend you to check my images for a correlation with your data. I know this strangulation very well, but I would say scutuloid to both. Also in Hymenoscyphus such strangulation occurs. Allophylaria is a close genus but has usually IKI-red apical rings.

With two samples alone it is impossible to tell whether the observed variation concerns two species or not.

Yes, Zotto. Yes. Of course more observation are needed for to think in a new species.

Thanks for your replay

Nina had a collection on Andromeda as Allophylaria basalifusca, and I said this is the same as C. leucella. It had the narrow spores, so it might be that Ericaceae have narrower spores.

A. basalifusca has wide spores and was on Quercus. Also a find on Alnus cones and leaves had wider spores: Calycellina leucella, VII.2011. I actually see this correlation also with further of my images. And indeed, Calycellina leucella, HB 6225b.JPG has the narrow spores and is on Vaccinium, also it has these hairs! I remember to have noticed these differences but was unable to draw a conclusion.

 Descriptions of C. leucella are probably few. What is it in its original sense??

Zotto

Yes. I had seen that Graddon mistook this fungus too with an Allophylaria species!

Here is my database. Seems that Ericaceae do not occur. But Spore width is partly rather narrow. Perhaps because of shrinkage....

Calycellina leucella (P. Karst. 1867) Dennis ex Mller 1977 -- CODE: ajc
Baral, H.O. 1985 Z. Mykol., Beiheft 6:53/3, BETULA b, 13.0-15.0/2.5-3.0æ
.../3, QUERCUS b, ...
Huhtinen, S. 1990 Karstenia 29:237/1,
Arendholz, W.-R. 1979 0:94/3, SALIX b, 12.0-15.0/2.0-3.0æ
Sacconi, S. 1983 Rivista Micol. 0:206/3, ALNUS b, 11.5-13.0/2.5-2.5æ
Ellis, M.B. 1985 0:94/2, BETULA b, 12.0-17.0/2.0-2.5æ
t Arendholz, W.-R. 1979 0:94/3, ALNUS b, 12.0-15.0/2.0-3.0æ
t .../3, BETULA b, ...
? Ellis, M.B. 1985 0:70/2, BETULA b, 16.0-18.0/2.0-2.0æ
? .../2, CASTvesca b, ...
? .../2, FAGUsylva b, ...
? .../2, QUERCUS b, ...
? .../2, SALIX b, ...

Nomenclatural synonyms:
ð Helotium leucellum (P. Karst. 1867) P. Karst. 1870
ð Hyaloscypha leucella (P. Karst. 1867) Boud. 1907
ð Pezizella leucella (P. Karst. 1867) Sacc. 1889
Jaap, O. 1922 Verh. Bot. Ver. Prov. Brandenb. 64:11/0, ALNUS b,
ð Cyathicula leucella (P. Karst. 1867) Raschle 0

Taxonomic synonyms:
= Crocicreas alnifructum Raitv. & Kutorga 1992
T Raitviir, A. 1992 Eesti NSV Tead. Akad. Toim. (Biol.) 41:162/3, ALNUincan z, 16.0-18.5/2.0-2.5æ
?= Allophylaria basalifusca Graddon 1977
Ellis, M.B. 1985 0:203/2, QUERCUS b, 18.0-25.0/3.5-4.0æ
Beyer, W. 1998 Z. Mykol. 64:10/3, SALIX b, 15.0-20.0/2.5-3.5æ
T Graddon, W.D. 1977 Trans. Br. Mycol. Soc. 69:258/3, QUERCUS b, 18.0-25.0/3.5-4.0æ

Or this is another thing....

I looked through my files and notes and find that I have a couple of records on Vaccinium. All of them have these narow spores, partly not reachning 2.5 µm! Those on trees were always broad, mostly far above 3 µm.

Do you know if these collections have ascospores as the mine: narrowly fusiform with apical part inflated and recurved?

Adio Enrique,
Adio Zotto,

During ascomycete alpine session in Pyrenees, at the end of august, I have found a similar "Calycellina" on nerves of Vaccinum myrtillus. I have given them to Michel Hairaud or Brigitte Capoen. Perhaps, they have study them and will participate to this post... I don't know.

Beñat

Many of my notes are unillustrated and in some I have mentioned a bit spore shape. But here I have two rough illustrations which were not scanned.

3071b is on Vaccinium and shows the "hairs". Spores inside the living asci 14-18 x 1.5-2, outside 2.5.

3542 is on Alnus cones. Spores wide, no hairs seen. 

Anm apical spore inflation  I do not see on your pics, and apical curves ar seen in both on your pics.

The spores on Vaccinium are a bit capitate and curved. Your illustration on Vaccinium uliginosum seems to be identical with mine and the gel on 'hairs' feets well with my own observations. The Alnus cones one is close to 'my' leucella on Betula leaves, with more 'calycinoid', strangulate, ascospores.

Thanks, Beñat! Maybe Michel or Brigitte say us something

Bonsoir Enrique, Zotto et Benat
La récolte de Benat  faite dans les Pyrenées sur feuille de Vaccinum et que j'ai étudiée concerne un Hymenoscyphus.
Amitiés
Brigitte

Merci Brigitte

A bientot á Somiedo

Adio to all,

Sorry to have disturbed this post with my "Calycellina" hypothesis.

Thanks Brigitte,
Beñat