Périthèce orangé, clairement hirsute lorsque sec.

Asques jusqu'à 75µm de long par 8µ de large, octosporé, généralement unisérié ou partiellement bisérié amyloides au melzer et avec un crochet(?) à la base. les spores sont presque fusiforme, en général asymétrique, contient 0-1 septa au centre et mesure 12-16*(2.5)3-4.5µ (en moyenne 13.5-3.5 (K = 3.9). spores hyalines. Poils orange-brun, en touffe, ornamenté. Paraphyse simple, remplis de granule orangé et sont occasionnellement bifide. Textura du type prismatica.

En général la collection est relativement immature, ce qui pourrait indiqué l'absence des spores avec 2-3 septae

Selon Barral A. cornuta et A. trabinelloides sont synonymes avec le nom A. cornuta en priorité.

Quelqu'un pourrait confirmé l'identification s.v.p

photo:

https://c1.staticflickr.com/1/789/25997466207_5195faab59_b.jpg

Jonathan M.

Kosonen Timo, 25-03-2018 21:08

Re : Arachnopeziza cornuta

Bonjour!

Any fresh material anywhere? If no, you could soak one apothecio in water for awhile and then try to capture spores/asci/hairs with a camera.

Maybe the combination of dead state and immaturity makes it look odd, but there's something non-trabinelloides about the spores. A. cornuta I only know through descriptions and can't comment Zottos view. He's often right of course :-).

Was it literally _harvested_ or are there any chanches of seeing it in a more mature condition later?

Always a delight to pick an Arachnopeziza!
Timo

Hans-Otto Baral, 25-03-2018 21:52

Re : Arachnopeziza cornuta

The crozier is clear, and I would not hesitate to say A. trabinelloides here. Two of the free spores are septate (not well in focus). The younger name I can say for sure based on the type, for the older cornuta I have no personal study.
Zotto

Michel Hairaud, 27-03-2018 21:49

Re : Arachnopeziza cornuta

Bonsoir M, Timo et Zotto,

I would have thought trabinelloides and cornuta different at least by macro colour, spore septation and also the spore appendages once seen by Korf as in the attached paper.
But I do not know of any drawing or picture showing this character. Neither do I know any macro picture  of a fungus lately identified as A. cornuta.
Do you ?

Amitiés
Michel

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Kosonen Timo, 27-03-2018 22:24

Re : Arachnopeziza cornuta

Salut Michel,

That was an interesting comment - from both you and Korf! -Hadn't seen that before. --Actually, very very recently I noticed there is one fresh (2009 if I recall right) A. cornuta collection in Stockholm herbarium. I should have an opportunity to study it soon. Otherwise I don't know of any "A cornuta" observations within last ten years.

My comprehension today is that in addition to A. aurelia there are atleast two other "yellow Arachnopezizas", mainly on hardwood logs. How trabinelloides, candidofulva/leonina and cornuta should be correctly aplied - that I am not yet 100% sure :-). My studies are in an "one more sample" phase.

timo