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Louis DENYBonsoir forumTrouvé à Belfort, 400 m altitude, s
Stalked Asco
Malcolm Greaves,
25-08-2016 16:12
This was found in an area of woodland damaged by tree felling.Pale orange, I thought it might have been a Scutellinia, about 5mm across with a stalk, mostly submerged, 8mm long.
The asci tips were blued with Lugol and the spores were 10.5 x 4.5µ.
Can anyone suggest a name or group?
Thanks
Mal
Enrique Rubio,
25-08-2016 16:55
Re : Stalked Asco
The pore (inoperculate asci) blued by IKI excludes a Scutellinia. This could be an Hymenosyphus species
Hans-Otto Baral,
25-08-2016 17:00
Re : Stalked Asco
Or more probably a Moellerodiscus.
Malcolm Greaves,
25-08-2016 18:20
Re : Stalked Asco
Is there anything I could look for to confirm this suggestion?
Mal
Mal
Hans-Otto Baral,
25-08-2016 21:12
Re : Stalked Asco
yes, different things:
For the genus I am sure, but for the species, which is almost impossible to determine, would be good to know
- the substrate (a leaf? which plant?)
- excipulum of globulosa?
- asci with croziers?
- living paraphyses with large yellowish refrctive vacuole?
- more measurements of spore size
There have been quite a few postings in Ascofrance about this genus. Currently one can identify M. lentus, but the situation ist much more coplicated.
Zotto
For the genus I am sure, but for the species, which is almost impossible to determine, would be good to know
- the substrate (a leaf? which plant?)
- excipulum of globulosa?
- asci with croziers?
- living paraphyses with large yellowish refrctive vacuole?
- more measurements of spore size
There have been quite a few postings in Ascofrance about this genus. Currently one can identify M. lentus, but the situation ist much more coplicated.
Zotto
Enrique Rubio,
25-08-2016 21:31
Re : Stalked Asco
Hi Zotto
What's the typical host for M. lentus?
Hans-Otto Baral,
25-08-2016 21:41
Re : Stalked Asco
The literature says it is plurivorous. This may be, but not everything is M. lentus.
Can't remember which is the type substrate.
Can't remember which is the type substrate.
Malcolm Greaves,
25-08-2016 21:52
Re : Stalked Asco
Thanks Zotto. I will see I can find the details you mentioned.
Mal
Mal
Enrique Rubio,
26-08-2016 00:32
Re : Stalked Asco
Thanks, Zotto
Michel Hairaud,
26-08-2016 09:21
Re : Stalked Asco
Bonjour Zotto, Malcolm & Enrique,
in Dumont 1976 Scleritiniaceae XI - On Moellerodiscus (= Ciboriopsis) we read :
Holotype. -Ceylon, Peradeniya, Thwaites 104, unidentified leaves, Nov 1887 (K).
In Berkeley & Broome 1873 (75) : on dead leaves, capsules, 1c. Nov. 1867
Amitiés
Michel
in Dumont 1976 Scleritiniaceae XI - On Moellerodiscus (= Ciboriopsis) we read :
Holotype. -Ceylon, Peradeniya, Thwaites 104, unidentified leaves, Nov 1887 (K).
In Berkeley & Broome 1873 (75) : on dead leaves, capsules, 1c. Nov. 1867
Amitiés
Michel
Malcolm Greaves,
26-08-2016 14:33
Re : Stalked Asco
Zotto
The substrate is difficult because although it was close to oak (with a leaf in the photo) there had been extensive tree felling of conifer and there looked to be needles in the soil that was collected with the specimen.
The excipulum was globular.
I could see no sign of croziers.
The paraphyses had a refactive vacuole but not sure it was yellow.
The spores were between 9 - 11 x 4 - 4.5
I hope this helps.
Mal
The substrate is difficult because although it was close to oak (with a leaf in the photo) there had been extensive tree felling of conifer and there looked to be needles in the soil that was collected with the specimen.
The excipulum was globular.
I could see no sign of croziers.
The paraphyses had a refactive vacuole but not sure it was yellow.
The spores were between 9 - 11 x 4 - 4.5
I hope this helps.
Mal
Hans-Otto Baral,
26-08-2016 21:13
Re : Stalked Asco
Clearly Moellerodiscus. I am quite sure it has croziers, the ascus base looks so.
Your last photo shows the vacuoles.
So I would file it as M. lentus. But I see the spores are too broad, M. lentus is more around 2.5-3.5 µm. Sorry, but it is a crazy genus.
Your last photo shows the vacuoles.
So I would file it as M. lentus. But I see the spores are too broad, M. lentus is more around 2.5-3.5 µm. Sorry, but it is a crazy genus.
Malcolm Greaves,
26-08-2016 23:54
Re : Stalked Asco
Thanks Zotto
I will record as Moellerodiscus lentus but make a note that the spores are too wide on current understanding.
Mal
I will record as Moellerodiscus lentus but make a note that the spores are too wide on current understanding.
Mal