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13-09-2025 14:01

Otidea platyspora or something else?
Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

13-09-2025 14:10

Hymenoscyphus on Rubus
Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

13-09-2025 15:43

Recherche
Edmond POINTE Edmond POINTE

Bonjour Christian,J'ai trouvé deux spores ressemb

11-09-2025 16:57

Marthamycetales revision published
Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

10-09-2025 23:53

Strickeria kochii?
Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

10-09-2025 17:18

Pseudocoprotus catenipilus ???
Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

02-09-2025 11:34

dark- and small-spored Sordariomycetes on Fraxinus - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10527903

07-09-2025 08:19

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Trichobolus
Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

Hymenoscyphus sp
ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

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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