Heterosphaeria patella 230614

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Heterosphaeria patella 230614

Miguel Ángel Ribes, 05-08-2014 10:24

Goog morning friends

This small black soft 800-1.200 µm diam. was growing probably on Urtica dioica, at semi-alpine place in a snowfield (nevero). It is young and more or less dead, but I think enough live to identify it.

Hemiamyloid asci, with croziers, elipsoid-cylindrical spores of (9.8) 11.1 - 14.1 (17.1) x (2.8) 3.4 - 4.0 (4.6) µm; Q = (2.8) 2.9 - 3.9 (5.1) ; N = 37; Me = 12.6 x 3.7 µm ; Qe = 3.4

Ectal excipulum brown with textura angularis and hard. Medular excipulum gelatinized and very soft.

Conidial presence.

Thank you in advance for your opinion.

Miguel Á. Ribes

Hans-Otto Baral, 05-08-2014 11:11

Re : Heterosphaeria patella 230614

Hi Miguel

did you test the Leuchtmann key?

Zotto

Miguel Ángel Ribes, 05-08-2014 11:58

Re : Heterosphaeria patella 230614

Hi Zotto

Yes, I have check it and I think is the nearest species, but it is the first time I study an Heterosphaeria.

Thank you.

Miguel Á. Ribes

Hans-Otto Baral, 06-08-2014 10:47

Re : Heterosphaeria patella 230614

You could try a closeup of the margin in section. The key of Leuchtmann starts with the presence vs. absence of periphysoids (below H. patella which has them).

Miguel Ángel Ribes, 06-08-2014 13:32

Re : Heterosphaeria patella 230614

Ummmm, I didn't make close-up pictures of the margin, but this is the result of crops from my pictures at 200x and 400x. I think is it enough to see the presence of this periphysoids cells, or not?

If so, following Leuchtmann key I arrive H. lojkae, because H. patella has not that bristle-like hyphae, or am I making a bad translation?

Thanks

Hans-Otto Baral, 06-08-2014 16:34

Re : Heterosphaeria patella 230614

You are right, I overlooked this. Only that H. lojkae has too narrow spores (2-3 µm). I suppose that your apothecia get nicely opened and toothed if you rehydrated them for some minutes. These teeth are absent in H. lojkae after his key. The photo below concerns a find with distinct periphysoids, however!

Miguel Ángel Ribes, 06-08-2014 18:41

Re : Heterosphaeria patella 230614

No, all my apos were completly close and without any reaction to the water, I supose all of them were semi-died. I could try it again (now they are completly dried), but I do not hope the opening.

Attached more macro photos. All of them were closed and depressed on the top, none opened.

Any posibility about H. patella has that bristle-like hyphae? Otherwise, I am at a dead end.

Thanks again.

P.D. Have you see the ladder-like perforations of the "Alnus" wood in "Another Mollisia ¿perelegans?" post

Hans-Otto Baral, 06-08-2014 21:31

Re : Heterosphaeria patella 230614

this is strabnge because I thought the opening mechanism works also in dead material. But I might be wrong.

Miguel Ángel Ribes, 11-08-2014 19:43

Re : Heterosphaeria patella 230614

Hi again

5 days later "incubating" the sample in a wet location, only small changes are observed, perhaps a little more star-shaped open apothecia, but nothing similar to Zotto's pictures.

Thank you.

Hans-Otto Baral, 11-08-2014 21:28

Re : Heterosphaeria patella 230614

I consider this period of time as sufficient :-)

Miguel Ángel Ribes, 11-08-2014 23:11

Re : Heterosphaeria patella 230614

Ok, we must wait next time to find and study it again.

Thanks.

Blasco Rafael, 11-06-2015 00:24

Re : Heterosphaeria patella 230614

Hola Miguel Angel y Zotto.
recogi el dia 30-05-15 esta muestra que es la misma que la tuya, Heterosphaeria patella.
despues de quince dias en la nevera y en camara humeda han abierto todos.
Los recogi en tallos de Angelica sylvestris, completamente secos, y al sol, habia cientos,
los tallos que estaban en sombra o algo humedos, no tenian ninguno,
supongo que quiere insolacion para poder fructificar,
Un saludo
Rafael

Miguel Ángel Ribes, 11-06-2015 00:34

Re : Heterosphaeria patella 230614

Yo los tuve muchísimo tiempo en cámara húmeda y no conseguí que ninguno se abriera, así que se quedó de momento como H. aff patella o lojkae. La macro se parece mucho a lo que yo estudié, la micro no tanto, sobre todo las paráfisis.

Suerte.

Hans-Otto Baral, 11-06-2015 08:26

Re : Heterosphaeria patella 230614

very good observation, Rafael! Yes, I suspect that Heterosphaeria is drought.tolerant. Did you make also any micros? - Sorry, overlooked your other posting.

Miguel-Angel: Your pics from last year show dead elements. It was obviously in bad state, for whatever reason. Although i expect that dead apothecia do open similar as living ones, this might be the reason why you were unable to ripen them more properly.

Zotto

Miguel Ángel Ribes, 11-06-2015 09:50

Re : Heterosphaeria patella 230614

Thank you Zotto

I hope this species will be found again in the living status this year.

Best wishes

Bernard Declercq, 18-02-2018 19:26

Re : Heterosphaeria patella 230614

Hi Miguel,

The conidia with the whip-like appendages belong to the sclerotia-like anamorph of Ceriospora polygonaceanum.

Best regards

Bernard Declercq

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