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06-04-2026 08:15

Lothar Krieglsteiner Lothar Krieglsteiner

some days ago, on the lower surface of leaf of Que

05-04-2026 22:46

Lothar Krieglsteiner Lothar Krieglsteiner

on wood of Ceratonia, Algarve, 3.4.2026.The color

05-04-2026 13:33

Sylvie Le Goff

Bonjour à tousPuis avoir votre avis sur ce champi

05-04-2026 20:40

Robin Isaksson Robin Isaksson

Hi!Found i Japan on bark of Abies sp. Spores 35-4

03-04-2026 17:11

Bohan Jia

Lastly, I have found these small apothecia on a co

31-03-2026 21:18

Miguel Ãngel Ribes Miguel Ángel Ribes

Good evening. oes anyone have the original descrip

31-03-2026 20:57

Stefan Blaser

Hello everybody, I hope somebody can help me with

26-03-2026 15:31

Ãke Widgren Åke Widgren

Hello,I found this one in October last year, on r

31-03-2026 16:20

Mlcoch Patrik Mlcoch Patrik

Hello, Please about help with determination. On

31-03-2026 08:19

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

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Rutstroemia maritima?
William Slosse, 11-02-2026 22:15
William SlosseToday, February 11, 2026, we found the following Rutstroemia in the drifting dunes at Bredene (Belgian coast).
The habitat and substrate (dead leaves of Ammophila arenaria) suggest Rutstroemia maritima.
° Crystals present in the texture
° Croziers present
° Ascus tips euamyloid (in Melzer, my Lugol unfortunately appears to be degenerated...).
A sporee is currently being prepared to measure spores in water.
Can this observation be confirmed, or do further preparations need to be made/examined?
Thanks in advance,
William
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Hans-Otto Baral, 11-02-2026 22:30
Hans-Otto Baral
Re : Rutstroemia maritima?
The rather thin apical dome looks typical to me. Please do the spore photo in water to see living spores.
William Slosse, 12-02-2026 17:17
William Slosse
Re : Rutstroemia maritima?
And here are the spores from a sporee and measured in water:

(13.6) 14.1 - 17.8 (18.4) × (5.8) 6 - 7.5 (7.9) µm
Q = (2.2) 2.3 - 2.58 (2.6) ; N = 20
Me = 15.6 × 6.5 µm ; Qe = 2.4

Additional questions:
1. According to Index Fungorum, the current name is Clarireedia maritima. Is this nomenclature preferable?
2. Should this species be listed as Clarireedia cf maritima, or is it clearly described and recognized as such?

Thanks in advance,
William

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Hans-Otto Baral, 12-02-2026 17:52
Hans-Otto Baral
Re : Rutstroemia maritima?
This is a full match. The genus is a matter of taste. From DNA Clarireedia is a well-defined group, but from morphology I see hardly any chance to separate it from the core of Rutstroemia.

In my folders I use Clarireedia. There you can see the high similarity among the collections on Ammophila.
William Slosse, 12-02-2026 18:52
William Slosse
Re : Rutstroemia maritima?
Thx, Zotto!