on 19-12-2019 I found on an old dune at the Belgian coast this tiny rosy species growing between Tortula ruralis.
I thought it might be a Roseodiscus but the parafyses aren't bent and branched at the end.

Apothecia: up to 4mm Ø and smooth
Stalk: up to 15mm long and darkening towards the base (older species)
Asci: J+ (Melzer) with croziers
Spores: Av (19.23-) 16.30 (-14.84) x (10.19-) 8.42 (-7.43); N= 40. Measurements in water. Ellipsoid to fusoid; smooth; hyalien. Mature spores are one-septated
Paraphyses: straight, slender and apically lightly swollen. Septated. Only a few were branched at the base.

Has someone any idea about this species?

Regards,

William

Hans-Otto Baral, 26-12-2019 16:49

Re : Roseadiscus formosus?

Hi

The apical ring type clearly places this fungus in the Sclerotiniaceae.

Did you notice that 4 spores are smaller than the others? It should be Sclerotinia trifoliorum

Zotto

William Slosse, 26-12-2019 18:44

Re : Roseadiscus formosus?

Thx for your help, Zotto.

Peter Püwert, 26-12-2019 19:19

Re : Roseadiscus formosus?

Hi, attention should also be paid to black sclerotia.

Greetings Peter.

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William Slosse, 26-12-2019 22:20

Re : Roseadiscus formosus?

Very nice to mention this, Peter.
This species has been reported on the Belgian coast only a seven times during the past 10 years.
It has surely been overlooked all the time.

Regards,
William