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11-04-2026 10:42

Una para ID
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia, España, recolec

11-04-2026 10:19

Bientôt, un nouveau livre important
Michel Hairaud Michel Hairaud

Chers amis d'Ascofrance , voici une très bonne no

11-04-2026 10:10

An important new book
Michel Hairaud Michel Hairaud

Dear Ascofrance members, here is some very good ne

10-04-2026 23:22

Pyreno on Phragmites australis
Gernot Friebes

Hi,ascospores are 1- to 3-septate, approximately 

10-04-2026 15:51

Botrytis ficariarum & Peronospora ficariae?
William Slosse William Slosse

Hello everyone, On 08/04/26, I found a growth sit

09-04-2026 15:25

Slerotinia verrucispora ???
Jac Gelderblom

On bare soil between mosses Ifound an asco I deter

09-04-2026 13:55

Small-spored "Diplodia" on broom (Cytisus scoparius) - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10589176

09-04-2026 10:12

Melanosporalian on attached decayed wood on fallen Carpinus, Denmark - very long-necked
Thomas Læssøe

https://svampe.databasen.org/observations/10587061

08-04-2026 20:33

Gyromitra sp. ?
Vasileios Kaounas Vasileios Kaounas

Found 07-04-26, in Abies cephalonica. Diameter 1,

08-04-2026 10:39

Littérature Korf
FRANCIS FOUCHIER

Bonjour , je recherche en pdf cet article: KORF R

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Helotiale on Platanus leaves
Nick Aplin, 29-04-2016 00:58
Salut à tous,

Hopefully there is someone here that can help me with this inconspicuous species I collected on the underside of Platanus x hispanica leaves on 24/4/2016:

Apothecia up to 0.4mm, smooth to densely hairy


51.128851°N, -0.152131°W 70 metres above sea level


Ascospores 8.1-10.5 x 2.9-4 µm, smooth, hyaline, aseptate, with few small droplets

Asci with croziers, IKI light blue, possibly with Hymenoscypus type ring (?)

Paraphyses with single elongated, +/- refractive vacuole

Hairs when present clavate, smooth, up to 3-septate, end cell with single vacoule.

I have no idea where this species belongs, so any hints whatsoever would be much appreciated!


Amitiés,
Nick

  • message #42338
  • message #42338
Stip Helleman, 29-04-2016 01:39
Stip Helleman
Re : Helotiale on Platanus leaves
Hi Nick,
the apical ring looks more Sclerotinaceous to me but about the genus I have currently no idea.

cheers,
Stip
Hans-Otto Baral, 29-04-2016 07:44
Hans-Otto Baral
Re : Helotiale on Platanus leaves
Hi Nich & Stip
this looks indeed a bit sclerotiniaceous, mainly the basal amyloid protrusion. Could you please characterise the excipulum? Possibly the fungus is related to Moellerodiscus, though being very small and apparently sessile.
Zotto
Nick Aplin, 30-04-2016 00:52
Re : Helotiale on Platanus leaves
Hi Zotto & Stip,

Thanks for the advice. I had briefly considered Sclerotiniaceae but ended up getting nowhere.

I must admit I haven't grasped the terminology to describe the excipulum, so I'm hoping the picture helps....If not, I can try some more sectioning but I fear I'll end up with less than ten fingers :)

You can see the outside of the apothecium is a rosy-brown colour and which darkens lower down. The point of attachment is black.

Cheers,
Nick
  • message #42355
Hans-Otto Baral, 30-04-2016 08:15
Hans-Otto Baral
Re : Helotiale on Platanus leaves
This is fine! I think the isodiametric cell shape at the flanks and the colour of the cell walls would not contradict my idea of a Moellerodiscus. But that genus is really difficult and badly studied.

I see there was a similar case of sessile ?Moellerodiscus growing on a twig of Ligustrum which I could study only in the dead state.
  • message #42357
Lothar Krieglsteiner, 30-04-2016 23:19
Lothar Krieglsteiner
Re : Helotiale on Platanus leaves

Hi Zotto,


ah - I remember this. I think it grew together with Tympanis ligustri there.


Regards from Lothar