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29-05-2026 15:35

Fusarium sur Robinier
daniel FERRE

Bonjour à tous,Je voudrais votre aide pour cette

28-05-2026 16:15

Literature request: Caloscypha fulgens f. caesioalba
James Mitchell

Hello,Does anyone have the original publication of

28-05-2026 11:06

Stictidaceae (?) on Typha latifolia - short-spored, I+ - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10596750

23-05-2026 11:44

Coprophilous pyrenomycete wild boar dung
Charles Grapinet Charles Grapinet

Hello, I am having trouble identifying this copro

25-05-2026 16:44

Ascomata under epidermis Carex
François Bartholomeeusen

Hi forum members,During an excursion organised by

26-05-2026 21:25

small ascomycetes on Quercus sp.
Dirk Gerstner

Hello everyone, I'm completely stumped by this li

26-05-2026 22:44

Incrucipulum capitatum ?
Ethan Crenson

Hi all, I think I have Incrucipulum capitatum her

22-05-2026 14:44

minute Saccobolus from cow-dung (moist chamber from Portugal)
Lothar Krieglsteiner Lothar Krieglsteiner

in unripe condition citrine yellow, then soon fadi

25-05-2026 16:35

Anamorphe d'Hypomyces aurantius ? sous saule cendré (Salix cinerea)
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

22-05-2026 13:29

Pseudophacidium ?necans on Vaccinium myrtillus
Gernot Friebes

Hi,I am curious to hear your opinion on this mater

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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