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07-02-2023 22:28

Ethan Crenson

Hello friends, On Sunday, in the southern part of

19-02-2026 17:49

Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

09-02-2026 22:01

ruiz Jose

Hola, me paso esta colección en madera de pino, t

19-02-2026 13:50

Margot en Geert Vullings

We found this collection on deciduous wood on 7-2-

19-02-2026 12:01

Castillo Joseba Castillo Joseba

Me mandan el material de Galicia (España), recole

17-02-2026 09:41

Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

16-02-2026 21:25

Andreas Millinger Andreas Millinger

Good evening,failed to find an idea for this fungu

08-12-2025 17:37

Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

17-02-2026 17:26

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous, Je recherche cette publication :

03-02-2013 19:50

Nina Filippova

Good time), I've compared this specimen with the

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Spherical-spored disco on Cistaceae
Bruce Malloch, 24-05-2025 22:34
Hello all,

I am new here, thanks for having me. I collected this inoperculate that I can't seem to identify:

Description: Discomycete. Apothecia superficial, substipitate, planar, scattered-gregarious, up to ~500µm wide, soft fleshy; receptacle duff, becoming dark grey-brown with age, roughened-subtomentose to subglabrous at maturity; disc pale buff to caramel brown with a subhyaline margin in young apothecia. Stroma absent. Ectal excipulum at the margins composed of pale brown textura porrecta, darkening with age, grading into an irregular textura angularis-prismatica intermixed with irregular filamentous hyphae; in young specimens, hyphae terminate in short, blunt, pale brown, sparsely septate hairs with smooth walls. Subhymenium pale brown. Medullary excipulum a hyaline textura irregularis with occasional clusters of hyaline textura-globosa, loose. Paraphyses hyaline, cylindrical to clavate, basally branched, occasionally septate, 2.5-4.0µm wide, terminating slightly above asci. Asci clavate, 8-spored, uniseriate or ocasionally biseriate at the apex, 65-70x6.5-9.0µm, without a refractive apical pore, J-, lacking croziers. Ascospores hyaline, irregularly globose to subglobose, 5.0-7.0µm diameter, smooth-walled. Anamorph not observed.

Substrate: Dead leaves on dead stem of live Hudsonia tomentosa


I have tentatively filed it under the genus Pithyella based on morphology, but these are all on cryptogams i.e. ferns, bryophytes, and other fungi. 

Does anyone recognize this fungus? Thank you!

Bruce
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Hans-Otto Baral, 25-05-2025 09:01
Hans-Otto Baral
Re : Spherical-spored disco on Cistaceae
Hi

First you must know that discomycetes are much easier to classify when studied alive (in water). The contents of the paraphyses are important for higher classification. Second it is disadvantageous to use Melzer for the iodine reaction of asci. The latter you did not show, but it is possible if you find MLZ- that the reaction would be IKI+.

You did not show the ascus base, how certain is the absence of croziers?

My database has nothing on Cistaceae with such spores.
Bruce Malloch, 25-05-2025 19:20
Re : Spherical-spored disco on Cistaceae
Hi Hans-Otto,

Thank you for taking a look at my collection. Unfortunately it was not possible to look at it fresh, as this was "bycatch" that came in with a collection of a pyrenomycete I made last summer. 

My choice of Melzer's was because I was humouring the possibility this species would be in Nauta & Spooner (1999) British Dermateaceae, and the authors of that publication use Melzer's for amyloidity testing. I also tried Lugol's, but it was also negative. Just now, I tried Lugol's with KOH pretreatment, and that also is negative.

I have attached some additional pictures of the asci in Lugol's and (separately) KOH which show the ascus base. One photo also shows what might be an ascus following spore dehiscence.

Bruce
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Hans-Otto Baral, 25-05-2025 21:04
Hans-Otto Baral
Re : Spherical-spored disco on Cistaceae
Indeed without croziers. This could exclude a Cordieritidaceae. Maybe it is a Hyaloscyphaceae, butr I have no idea.
Bruce Malloch, 25-05-2025 22:04
Re : Spherical-spored disco on Cistaceae
I will have another opportunity to collect on this plant host next month, and will keep an eye out for fresh material for a better description. If I can find it in enough abundance, I will try to have it sequenced.