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25-03-2026 10:35

Hulda Caroline Holte

Hello,I collected this species growing on a dead b

24-03-2026 19:59

William Slosse William Slosse

Hello everyone,On 23/03/26, I found the following

21-03-2026 15:13

Lepista Zacarias

Hello everyone, Does any one know of any literatu

24-03-2026 21:37

Elisabeth Stöckli

Bonsoir,Sur bois (tronc) très pourri de conifère

24-03-2026 21:07

Ethan Crenson

Hello all, A friend collected this asco in a wood

23-03-2026 20:16

Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningI'm unable to identify this Coprotus o

24-03-2026 15:44

Åge Oterhals

I hope someone can confirm the name of this collec

24-03-2026 11:58

Castillo Joseba Castillo Joseba

Me mandan el material de Galicia, recolectado en c

23-03-2026 13:24

Paul Cannon

Could anyone provide me with a pdf of Auerswald's

20-10-2017 09:23

Garcia Susana

Este otro crecía en el mismo trocito de madera qu

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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!