Must be Tatraea dumbirensis. See earlier posts.

Merci Zotto !

Je suis surpris par les spores peu arquées par rapport aux récoltes de cette espèce sur Ascofrance.

Des photos en complément.

Qu'est-ce qui différencie les Tatraea des Hymenoscyphus/Phaeohelotium ? La réaction à l'iode ou l'excipulum ectal peut-être ?

Andgelo

Not easy to say, but at least the apical ring reaction is different, showing almost the entire wall thickening in blue.

OK merci.

Peux-tu s'il te plait me confirmer que les deux dernières photos de spores correspondent bien à Tatraea dumbirensis ?

You are fully right when asking. I actually miss the curvature of the spores although exceptionally  straight spores may occur in Tatraea dumbirensis.

But I have no other idea. The apical ring looks o.k. The paraphyses do not seem to contain strikingly refractive vacuoles.

Maybe you do not know the article about that genus? I send in to your mail address.

Zotto

Merci pour le document.

Une vue de l'appareil apical des asques.
En effet, pas de guttules très réfringentes dans les paraphyses.

C'est bon! typical Tatraea apical ring.

Merci.

Je suis tombé sur une autre récolte de cette espèce, à 30 km de la première.
Ce sont toujours des spores exceptionnellement droites...

Do you have a docu of this two? We need to make a detailed comparison I fear.

Plus de matériel de la seconde, mais à première vue elle est identique à la première.

J'ai gardé un exciccata de la récolte initiale.

I overlooked that Luis Quijada has possibly the same Tatrea with straight spores, from Tenerife. He is preparing a paper on this which includes also a molecular analysis. Now I put both in a separate folder.

Bonsoir les amis,

I have just found the very same on dead Quercus ilex on Ile de Ré (decorticated and still quite hard wood) . Typical IKI reaction for Tatraea , straight spores never reniform and the same size as Andgelo's collection. A striking globulosa ectal

Did Luis give any further information on this collection ?

I saw T dumbirensis several times and I think this is different , though probably close.

Pictures to come, I hope

Amitiés

Michel

I have Luis' photos in my folder together with a description of a sample from Tenerife (2014), the collection data and substrate I do not know:


L. Quijada: - Apo up to 2 mm diam., 0,5 mm high. Excipulum with two layers. Outer layer of globose to angular texture, inner layer parallel to more or less intricate, cells non-guttulate, except for protuding cells at margin with one pale-yellowish VB, walls not thickened.- Asci *137-164 x 12-14 um, +108-124 x 9.3-12 um. Apical ring +1.8-3.7 um wide. - Ascospores *15.5-19 x 4.8-5.7 um, +13-16 x 4.3-5.3 um, multiguttulate (LBs, 75-90%), in dead state usually with one big guttule.- Paraphyses in apical cell multiguttulate (VBs, pale-yellowish to hyaline), apical cell 46-55 x 2.8-3.3 um, cells bellow 16.5-31 x 2.5-3.3 um.

Hi
I made a collection in november 2016 at Villiers-Couture (limit of dept. 17-79) that I nammed T. dumbirensis. Apos were hidden in a caivity of a trunk fallen on the ground.
spores (17,53)17,61-17,78-21,46(22,20) x (6,75)6,79-7,65-7,72(7,75). I have to look for the date of collection.
François

Once more great!

Francois, would be good to look also for the wood anatomy, could be Quercus? It looks like broad radial rays, so when the wood is ring-pored it is sure.

Merci Patrice!

Is it possible that this species does not form a distinct stipe? In T. dumbirensis a stip is usually present and photos are not rarely taken from the side.

Yes indeed . Even in the most flattened apos, a stipe can be detected (sometimes not more than 0,3 mm) and it can be really noticeable in a few cases. .

Amitiés

Michel

 

Oh yes - I would be happy if there is a second character of that fungus.

You mean a second character which would separate it from dumbirensis ?

I think that spore size and figures are.

Here are a few notes on my collection MH 11218 :2 12 2018

France Charente Maritime Ile de Ré St Martin de Ré, Les Maraises . In wood of Q. ilex dead branch decirticated and still veru hard wood. Apos white becoming greyish , diameter  mostly 1-2,5 . 4mm) about 1,3 mm thick.  stipe short . Chair soft, not gelatinous.

EE T. globulosa , cells -7-14 evoluting to T? angularis on the flanks surfaces . (7-15 x 10-20)

EM T intricata of long hyphae rather subparallel : 2-5,5 x 20-50 µm

Spores mostly 16-19 (20) x 5,5-6 , OCI 4,5 , fusoid to slightly clavate or shlthly ''bryosyphusoid'' but never reniform. One-septate when overmature

Ascus H+, IKI + typical for Tatraea with Hymenoscyphus canal and diffused reaction nearly filing the ascus chamber. PS 55 - 60 . Biseriate spires 135-145 (150) x 10,5-11 (living state)

Paraohyses x 2-3,5 , filled with VBs obviously visible in CRB. Marginal cells larger (4-55, with no VBs .

AMitiés

Michel

Indeed, spores and asci smaller, also in Luis' sample from Tenerife.

Spores 14-20 x 5,5-6 µm sur ma récolte.