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Hymenoscyphus sur terre argileuse humide et acide

Bernard CLESSE, 11-10-2015 11:43

Bonjour à tous,

Voici ce qui me semble être un Hymenoscyphus, trouvé sur la terre humide, argileuse et acide d'un talus forestier.

a) spores fusiformes, avec microguttules (parfois uniseptées, à maturité ?) : 15,5-17x4-4,5
b) asques octosporés, à spores bisériées, IKI+, à crochet à la base : 127x9
c) paraphyses filiformes, septées, à contenu réfringent

Une idée ?

Bernard

Hans-Otto Baral, 11-10-2015 11:53

Re : Hymenoscyphus sur terre argileuse humide et acide

Hi Bernard

I don't know. Perhaps a section of the excipulum could give more hints.
But when I look at my images of H. epigaeus I think it fits quite well.

I am not sure with which species this one could be related. With H. lutescens perhaps?
H. epigaeus is maybe a Phaeohelotium rather than a typical Hymenoscyphus.

Zotto

Bernard CLESSE, 11-10-2015 12:10

Re : Hymenoscyphus sur terre argileuse humide et acide

Hi Zotto,

Thank you for your answer!

As soon as possible I will make a section of the excipulum. For my information, is that there are many Hymenoscyphus that grow on moist soil?

Bernard

Hans-Otto Baral, 11-10-2015 12:57

Re : Hymenoscyphus sur terre argileuse humide et acide

This is a very unusual habitat for inopercs indeed. Sometimes there is some remnants of wood etc. in the soil, but in the case of H. epigaeus I am not sure.

Zotto

Bernard CLESSE, 11-10-2015 12:59

Re : Hymenoscyphus sur terre argileuse humide et acide

Thank you for your opinion Zotto !

Bernard

Gernot Friebes, 12-10-2015 15:28

Re : Hymenoscyphus sur terre argileuse humide et acide

Hi all,

just recently I was given a collection of a yellow discomycete which I identified as Hymenoscyphus epigaeus. I didn't notice any connection to pieces of wood, just bare soil and moss where the apothecia are growing. A few pics are attached!

Best wishes,
Gernot

Hans-Otto Baral, 12-10-2015 15:44

Re : Hymenoscyphus sur terre argileuse humide et acide

Thanks, Gernot, interesting! Obviously a good species, this epigaeus, but where to combine it? I think that genetic data could give us a hint. Maybe H. repandus would be related which is not a good Hymenoscyphus.

Your excipulum photos fit my notes and drawing. Rather broad prismatic cells.

Did you measure the spores?

Zotto

Gernot Friebes, 12-10-2015 17:12

Re : Hymenoscyphus sur terre argileuse humide et acide

I did but I don't have my notes at home so I will tell you my measurements tomorrow. I have plenty of material left, do you think someone would be interested in sequencing it?

Best wishes,
Gernot

Hans-Otto Baral, 12-10-2015 17:33

Re : Hymenoscyphus sur terre argileuse humide et acide

Wenn du so viel hast, dann sollte das versucht werden! Diese menthae/repandus-Gruppe braucht noch ein paar Arten, um eine bessere Schlussfolgerung ziehen zu können.

Ich schlage einfach vor, es Guy zu schicken, mit schönem Gruß von mir. Er hat auch den repandus sequenziert.

Danke!
Zotto

Gernot Friebes, 13-10-2015 18:58

Re : Hymenoscyphus sur terre argileuse humide et acide

Wird morgen weggeschickt! Bin schon gespannt, was dabei rauskommt.

Die Sporen hab ich übrigens mit 14,0-17,5 x 4,8-5,5 µm gemessen. Manche Sporen hatten eine Hülle (ist auch auf den Fotos zu erahnen).

Schöne Grüße
Gernot

Hans-Otto Baral, 13-10-2015 21:52

Re : Hymenoscyphus sur terre argileuse humide et acide

sehr gut, danke!!

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