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23-04-2024 13:17

Ascobolus foliicola
Edouard Evangelisti Edouard Evangelisti

Bonjour à tous, Je viens de récolter ce que je

11-01-2022 16:36

Literature request: Raitviir (2004) Revised synopsis of Hyaloscyphaceae?
Jason Karakehian Jason Karakehian

Hi does anyone have a digital copy of Raitviir A (

22-04-2024 08:54

Spores inconnues
Rafael Cabral

Bonjour à toutes et tous, Quelqu'un pourrait-il

22-04-2024 20:38

Anamorph on Erica arborea 170424 670 from Madeira
Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon.Does anyone know this anamorph?It g

22-04-2024 11:52

Microstoma from South Korea
Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I made a loan of a collection of Microstoma

21-04-2024 14:29

Brunnipila brunneola
B Shelbourne B Shelbourne

• Genus Brunnipila: Distinct macro and habitat,

19-04-2024 14:28

Cudoniella tenuispora
B Shelbourne B Shelbourne

Cudoniella tenuispora: Distinctive macro and habit

20-04-2024 16:02

Livres d'occasion
Michel Hairaud Michel Hairaud

Bonjour,On me fait part, pour diffusion d une list

20-04-2024 09:56

Help with a black discomycete
Josep Torres Josep Torres

Hello.A few apothecia collected on Sunday, April 7

19-04-2024 18:32

Ascobolus denudatus?
Anna Klos

Good evening,I found this Ascobolus on wet soil an

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Hymenoscyphus on petiole
Stefan Jakobsson, 19-08-2022 19:05
On a petiole of a leaf of what seems to be Populus tremula (even though I can't fully exclude Alnus) I found an long-stipitate Hymenoscyphus. The spores are slender (20.9)24.1-29.0(31.0) × (3.6)3.7-4.2(4.4) µm and the asci short 87-95 × 8.2-9.7 µm, without croziers. The excipulum seems to have some hairs with yellowish content.

If looking at the spores alone it could fit H. fastidiosus, but the full picture is more complicated.


What should I call this one?


Stefan

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Bernard Declercq, 19-08-2022 20:26
Bernard Declercq
Re : Hymenoscyphus on petiole
Hi Stefan,

This is what I am used to call H. scutula var. pteridis, the non-ciliate form of H. scutula ss. str.
I don't know if these taxa have been sequenced in order to know if the second one is in need of an upgrade to species level.

Bernard

Stefan Jakobsson, 19-08-2022 21:13
Re : Hymenoscyphus on petiole
Thank you!

That one is said to have oil content 5 (about 80 percent) and I took this one to have lower oil content.
Hans-Otto Baral, 20-08-2022 06:52
Hans-Otto Baral
Re : Hymenoscyphus on petiole
Difficult to comment. Spore length is a bit over H. scutula.

In my scutula folder is a sample by T. Hülsewig

"Hymenoscyphus scutula, 2.XI.2018"

on dead stems of Eupatorium sp.

This seems to me the long-spored form of H. scutula, "H. fucatoides nom. prov.", which is in my folder "fucatus aff. H-". But it could also be H. scutula. It has short setulae at the spore base.

The problem with H. scutula is, that several genetically different sequences exist in GenBank but without known morphology, so it is not even possible to say which H. scutula sequence is the typical one.

Bernard, you do not mean Feltgen's Helotium scutula f. pteridis? It is not in Index Fungorum and has spores 18-20 x 3.5-5 µm. Or you mean Hymenoscyphus pteridicola (Crouan) Kuntze which is a small-spored Cyathicula? Surely not Hymenoscyphus pteridicola Thind & Sharma which is H. macroguttatus.
Stefan Jakobsson, 20-08-2022 12:37
Re : Hymenoscyphus on petiole
I rechecked but did not find a single setula.

Bernard's key says Hymenoscyphus scutula (Pers.: Fr. )Phill. var. pteridis (Feltgen) Declercq stat. nov. ined.