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Leptoshaeria? on Quercus
Martin Bemmann,
02-09-2010 00:32
Hi,this one is from a dead branch of oak, still attached to the trunk in approx. 2 m height above ground. The branch is completely decorticated and covered by algues, lichen etc. I found Orbilia aprilis and some pyrenos on it amongst them this one:
It has obpyriforme perithecia, with a leathery to "carbonized" peridium. Size is c. 185µm width by 40 µm height. Most of those ascocarps are superficial but some are also partly immersed in the decorticated rotten wood. The spores are fusiforme and multiseptated (41,8-46,2 x 5-6,4 µm).
My guess is a Leptosphaeria, but....
Maybe some of you will recognize this one.
>
Best regards,
Martin
Martin Bemmann,
02-09-2010 00:33
Re:Leptoshaeria? on Quercus
a single one...
Martin Bemmann,
02-09-2010 00:41
Re:Leptoshaeria? on Quercus
and spores:
Bernard Declercq,
02-09-2010 11:22
Re:Leptoshaeria? on Quercus
Hi Martin,
Spores are rather assymmetrical, uncommon for a Leptosphaeria.
Did you observe bitunicate asci?
Bernard
Spores are rather assymmetrical, uncommon for a Leptosphaeria.
Did you observe bitunicate asci?
Bernard
Hans-Otto Baral,
02-09-2010 18:36
Re:Leptoshaeria? on Quercus
Maybe it is this one? I regret I have only dead photos, but I noted this to have multiguttulate spores when alive. Asci unitunicate. I compared my fungus with Chaetosphaeria.
HB 6170c. Tübingen-Pfrondorf, 400m, on very rotten branch of Quercus (wood), 28.VI.1998, H.-O. Baral & G. Marson (HB 6170c)Assoc.: "Fuscolachnum mollisioides, Durella connivens Waldrand, Hang zur Schlucht, Qu-Carp-Acer camp-Frax-Fag-Wald, ca. 3m above ground, ca. 1m long. branch, near tip, 15-20mm thick, decort., strongly algae-covered. Asci unitunicate, Spores *38 x 5,3 µm, hyaline, strongly fusoid, ca. 14 celled, many minute LBs.
HB 6170c. Tübingen-Pfrondorf, 400m, on very rotten branch of Quercus (wood), 28.VI.1998, H.-O. Baral & G. Marson (HB 6170c)Assoc.: "Fuscolachnum mollisioides, Durella connivens Waldrand, Hang zur Schlucht, Qu-Carp-Acer camp-Frax-Fag-Wald, ca. 3m above ground, ca. 1m long. branch, near tip, 15-20mm thick, decort., strongly algae-covered. Asci unitunicate, Spores *38 x 5,3 µm, hyaline, strongly fusoid, ca. 14 celled, many minute LBs.
Martin Bemmann,
03-09-2010 13:08
Re:Leptoshaeria? on Quercus
Hi Bernard and Zotto,
thank you for yuor comments. Here are some pictures of the asci in IKI, that maybe help.
Best regards
Martin
thank you for yuor comments. Here are some pictures of the asci in IKI, that maybe help.
Best regards
Martin
Martin Bemmann,
03-09-2010 13:08
Re:Leptoshaeria? on Quercus
another:
Martin Bemmann,
03-09-2010 13:09
Re:Leptoshaeria? on Quercus
still more:
Martin Bemmann,
04-09-2010 23:27
Re:Leptoshaeria? on Quercus
Hi,
I made a new preparation with CB to find out if there is a visible apical aparatus. I think there are parts staining different and one can imagin an annulus... ;-)
Cheers
Martin
I made a new preparation with CB to find out if there is a visible apical aparatus. I think there are parts staining different and one can imagin an annulus... ;-)
Cheers
Martin
