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15-12-2025 15:48

Danny Newman Danny Newman

Melanospora cf. lagenaria on old, rotting, fallen

15-12-2025 15:54

Johan Boonefaes Johan Boonefaes

Unknown anamorph found on the ground in coastal sa

15-12-2025 21:11

Hardware Tony Hardware Tony

Small clavate hairs, negative croziers and IKI bb

15-12-2025 07:09

Danny Newman Danny Newman

indet. Rutstroemiaceae sp. on unk. fallen leavesMc

15-12-2025 21:47

Pol Debaenst

Good evening, On 12/11/2025 I found ascomycetes w

15-12-2025 07:05

Danny Newman Danny Newman

Pseudosclerococcum golindoi (det: Zotto)near Cosb

15-12-2025 11:49

Danny Newman Danny Newman

ITS sequences from the following two collections B

15-12-2025 12:34

Danny Newman Danny Newman

indet. Rhytismataceae on oak leafnear Purchase Roa

09-12-2025 12:06

Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche l'article concernant Hypobryo

13-12-2025 17:26

Buckwheat Pete

Hello everyone,I have a rather interesting ascomyc

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Hydropisphaeria sp.
Garcia Susana, 25-03-2015 08:14
Hi all:

I found this ascomycete growing on stems of Equisetum arvense.
Perithecia size diameter is 200-230um. They are superficial, on a subiculum of hyphae; very easily removable. Color orange. When drying takes on a darker color and takes shape apotecioide.

The reaction is negative both KOH and the lactic acid.
Spores I see them smooth (I made stains with CB and RC and I have not seen any trace of ornamentation).
With the documentation that I have, I understand that this is Hydropisphaeria, and the key I have come to H.arenula, but the spore size would be too large.
That think?


regards
Susana

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Hans-Otto Baral, 25-03-2015 08:36
Hans-Otto Baral
Re : Hydropisphaeria sp.
Yes I also think it is H. arenula. When I wrote with Christian the paper on Ijuhya equiseti-hyemalis, we treated also this species.

Spore size fits well. In H.B. 8622b, e.g., I measured 13.5-)16.5-#18-21#(-22.5) x 4.3-5.2(-5.8) µm

I also revised the type of Nectria equiseti-hiemalis showing spores in KOH (12-15-)16-22 x (3.2-)3.5-3.7(-4.2) µm. We confirmed its synonymy with H. arenula.

Do you have my paper? It is in Österr. Z. Pilzk. 17 (2008). I can send you a pdf.

Zotto
Gernot Friebes, 25-03-2015 09:02
Re : Hydropisphaeria sp.
Hi,

the paper Zotto mentioned is also available online:

http://www.landesmuseum.at/pdf_frei_remote/OestZPilz_17_0015-0024.pdf

Best wishes,
Gernot
Garcia Susana, 25-03-2015 09:06
Re : Hydropisphaeria sp.
Hi Zotto,

Thanks for the confirmation.
No, did not have the paper you mention, but I've seen that is available on the red and I've downloaded. Now I'll have a look.

Un saludo
Susana