Accès membres

Mot de passe perdu? S'inscrire

22-02-2024 11:05

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me confirm

21-02-2024 16:22

Laurent Bonneau Laurent Bonneau

petites apothécies blanchâtre Spores verruqueus

20-02-2024 22:58

ruiz Jose antonio

Hola en resto de herbáceas sin determinar, ¿de t

19-02-2024 08:01

Stoykov Dimitar Stoykov Dimitar

Hallo,Attached are photos of ascomycete finding, f

17-02-2024 11:59

Francisco  SÃNCHEZ Francisco SÁNCHEZ

Os presento esta colección sobre ramas muertas de

20-02-2024 17:23

Luc Bailly Luc Bailly

Bonjour,Voici une récolte d'une Calloriaceae pour

20-02-2024 15:53

Laurent Bonneau Laurent Bonneau

EN observant mes Saccobolus issus de laissées de

20-02-2024 15:21

Sylvie BIANCARDINI

Bonjour,Trouvé cet Ascobolus sur une laissée de

20-02-2024 12:10

Luc Bailly Luc Bailly

Bonjour à vous, J'ai une récolte d'un Mollisia

« < 1 2 3 4 5 > »
small yellow Peziza from Germany
Lothar Krieglsteiner, 30-01-2019 20:55
Lothar Krieglsteiner

... only 1 ascoma, found at 2.6.2014 in Thuringia, National Park "Hainich", on bark of a lying log of Quercus. The very small apothecium was about 8 mm large (or so). First I did not think of a Peziza but the asci are clearly iodine-positive. The spores I measured are about 16,5-18,5/8,5-10 µm, but there are (almost) only spores inside the ascus. The ascoma is perhaps not fully ripe, but the spores show a well-developed ornamentation.


Today I re-examined it and made new fotos - but I do not come to a conclusion again.


Can somebody give me a hint?


Best regards from Lothar


P.S. The last foto was taken at the day of collection (there was few time then) - and as far as I remember (right?) it was examined in water - so the spore could be living still.

  • message #56059
  • message #56059
  • message #56059
  • message #56059
  • message #56059
  • message #56059
  • message #56059
  • message #56059
  • message #56059
Hans-Otto Baral, 30-01-2019 21:01
Hans-Otto Baral
Re : small yellow Peziza from Germany
Hallo Lothar!

Yes, the last photo shows living spores. The asci react blue only at the apex or entirely?

With very small you actually mean 8 mm or 0.8 mm (for me 8 mm is very large :-).

Zotto
Lothar Krieglsteiner, 30-01-2019 21:08
Lothar Krieglsteiner
Re : small yellow Peziza from Germany

Hello Zotto,


thank you very much for the confirmation of the living spore.


8 mm is very large for a Calycellina or a Hamatocanthoscypha (or better: much too large), but for a ripe Peziza 8 mm is quite small.


The asci react blue as a whole, but the most at the top - as is quite typical for a Peziza. Or do you have another idea?


Best regards, Lothar

Hans-Otto Baral, 30-01-2019 21:41
Hans-Otto Baral
Re : small yellow Peziza from Germany
I am not very familiar in Peziza, but I think a photo in IKI would be helpful. I thought that most larger species of Peziza (you are right with the size) react only at the top but I may be wrong.
Viktorie Halasu, 31-01-2019 08:03
Viktorie Halasu
Re : small yellow Peziza from Germany
Dear Lothar,

I've seen similar collection and called it P. polaripapulata, those small LBs and ornamentation with flat polar caps looked the same. Young apothecia were plainly yellow, only later they gradually changed to olive with coarsely furfuraceous receptacle. But in Hansen et al 1998 (New and rare species of Pezizales from calcareous woodlands in Denmark) they say this species should have aporhynchous base (the collection I studied had croziers too).

Viktorie


Lothar Krieglsteiner, 31-01-2019 09:34
Lothar Krieglsteiner
Re : small yellow Peziza from Germany

Hello Victorie,


thanks a lot for your hint - I did not think of an apiculate form, because the ornament is not very conspicuously stronger at the spore ends for me. But perhaps this judgment is not right.


Best regards, Lothar

Lothar Krieglsteiner, 31-01-2019 15:05
Lothar Krieglsteiner
Re : small yellow Peziza from Germany

Hello Zotto,


I did not take a foto of the IKI-reaction of the ascus-apices. Those reacted strong, and a small way down the reaction stopped or got weaker, as is typical for Peziza. But the region of the basal asci (above the subhymenium) stained bluish as a whole, so I considered the whole asci as positive (see picture). But - I do not think this character is of high value in Peziza, at least not as far as I know.


Best regards, Lothar

  • message #56074
Till Lohmeyer, 31-01-2019 16:24
Re : small yellow Peziza from Germany
Hi, Viktorie & Lothar - 


it's funny - when I first saw the picture of the fungus I spontaneously thought of a collection of what we determined later on as Peziza obtusapiculata, i.e. an apiculate species like P. polaripapulata. The ecology would fit, too. The lack of the typical apiculi could be due to the fact that Lothar's specimen was not yet fully mature. But if that were the case, we would have to assume that the apiculi develop only very late, as in some Gyromitra/Discina species. I do not know whether this process has already been scientifically studied with special regard to the apiculate Pezizas.

Regards, Till 


Hans-Otto Baral, 31-01-2019 16:51
Hans-Otto Baral
Re : small yellow Peziza from Germany
I remember it is important in Peziza to illustrate exactly where a reaction takes place. In P. subisabellina the entire ascus reacts pale blue, but I see this is now a Pachyella. Also Peziza isabellina is depicted so by Boudier. And Peziza gerardii/ionella reacts this way. A diffusely blue reaction in the upper region only I saw in P. bubaci.

I cannot find an indication for a Peziza that reacts strongly blue at the apex and weakly so down to the base. Maybe someone knows.

Zotto
Lothar Krieglsteiner, 31-01-2019 22:54
Lothar Krieglsteiner
Re : small yellow Peziza from Germany

Hallo Till und Zotto,


vielen Dank für die weiteren interessanten Informationen! Mal sehen, ob sich noch etwas ergibt ...


Herzliche Grüße von Lothar

Andreas Gminder, 01-02-2019 13:48
Andreas Gminder
Re : small yellow Peziza from Germany

Hallo Lothar,


ich wäre auch recht sicher, dass dies P. polaripapulata ist.


Jung feucht olivschwarzgrün, dann mehr und mehr ockergelb.


Das Ornament ist nur eine polare Verdickung, kein echtes abstehendes Ornament wie bei den anderen apiculatsporigen, und soweit ich weiß ist polaripapulata auch gar nicht direkt mit apicualta und den anderen verwandt.


Ich habe die Art(en) in einem Artikel im Boletus jüngst gegenübergestellt. Ich maile dir den mal zu.


beste Grüße,
Andreas

Lothar Krieglsteiner, 01-02-2019 13:52
Lothar Krieglsteiner
Re : small yellow Peziza from Germany

Hallo Andreas,


vielen Dank für die Bestätigung von Victories Vermutung!


Der Fund stammt ja aus dem Hainich-Projekt - vielleicht kann er noch zugeordnet werden. Eine Stammnummer habe ich nicht mehr, aber mit dem Datum und der Notiz auf dem Zettel müsste es noch gehen (?).


Ja - den Artikel von Dir nehme ich gerne :-)


Lieben Gruß von Lothar