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27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

25-03-2024 20:21

DAVID MARCOS DAVID MARCOS

Bonjour, je m'appelle David et je débute dans l'i

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Tympanis hypodontia ?
Michel RIMBAUD, 21-02-2017 23:03
Bonsoir ,
J'ai récolté ce petit asco sur écorce d'Abies.
Isolé, diam 0,28mm, noir +/- verdâtre. 
Asques 17-20x125µ remplies de petites granules.
J'ai pensé à Tympanis hypodontia, qu'en pensez-vous ?
Michel.
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Hans-Otto Baral, 22-02-2017 06:30
Hans-Otto Baral
Re : Tympanis hypodontia ?
I think without oil immersion or a largermagnification it is impossible. 
Tympanis species have 8 (primary) ascospores which germinate inside the living ascus to form ascoconidia. These primary spores differ between the species, being septate in some species, also the germ tubes differ. So you need to search for immature asci.
Michel RIMBAUD, 23-02-2017 12:24
Re : Tympanis hypodontia ?
Looking in detail through the little piece of bark I kept near me I finaly found 1 youngest specimen with un ascus containing a few primary spores.
They are ellipsoid 3,8 x 5,8µ with a garminal tube about 6µ long.
Trying the key from  R.K. Schumacher, I didn't succeed in a sure identification.
My preference would be T.truncatula because of the smaller size than the others (neopithya and piceae). T.hypopodia has clearly smaller ascus than my specimen.
Your opinion ?
Michel
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Hans-Otto Baral, 23-02-2017 12:55
Hans-Otto Baral
Re : Tympanis hypodontia ?
Which article is this Schumacher key?
 
I only know Ouellette  & Pirozynski, here attached.
Michel RIMBAUD, 23-02-2017 14:00
Re : Tympanis hypodontia ?
Thank you Zotto for the document you sent to me, I will try with it.
I didn't suceed sending you the key I used through the forum page, I send you by email.
Michel
Hans-Otto Baral, 23-02-2017 15:56
Hans-Otto Baral
Re : Tympanis hypodontia ?
Thanks for the key. The genus is difficult and I think you need several young asci with germinating spores to be sure. If there is never a septum then the key unmistakably leads to neopithya and piceae. I did not compare what Ouellette & Pir. say.
Michel RIMBAUD, 23-02-2017 18:05
Re : Tympanis hypodontia ?
I went one more time on the site to collect parts of bark on the same tree.
Finally I found other immature ascus with germinated spores inside.
I didn't see any septa, the mesures of the spores give Q = 1,25 and 1,36.
With the key I sent you it fits with T.neopithya (not T.picea --> Q=2).
But it does not fit with the key from Ouellette-amp-Pirozynsk wich gives T.neopithya in Fig.A1 with club shaped germ cells. Mine are clearmy cylindrical.
So I think it is T.alnea according to Ouelette key. 
It fits well too with Schumacher key, except for the host (see point 9(8) ..."anderen LGH").
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Lothar Krieglsteiner, 23-02-2017 18:21
Lothar Krieglsteiner
Re : Tympanis hypodontia ?

Thanks, Zotto, for the paper of Oulette & al.!


I would also be interested in the Schumacher key ...


Best regards, Lothar

Hans-Otto Baral, 23-02-2017 18:23
Hans-Otto Baral
Re : Tympanis hypodontia ?
Hmm, T. alnea is a frequent species on angiosperms, I never heard of gymnosperm hosts. T. alnea has abundant crystals on the apothecial exterior, causing a greyish-white pruina in the dry state, and I think I remember that such crystals were not stressed enough by authors. Also T. alnea always grows fasciculate.
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