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François Bartholomeeusen

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éric ROMERO éric ROMERO

Bonjour, Une question à propos de la réaction a

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Ethan Crenson

Hi all, Found late last week in a New York City p

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Robin Isaksson Robin Isaksson

Hi! Found in Sweden. Ascomata with haris, se

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F. JAVIER BALDA JAUREGUI

Hello, everyone.An idea for this pyreno, I found u

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Sylvie Le Goff

Bonjour. Petite pézize récoltée au sol en bordu

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Gernot Friebes

Hi!We observed this hyphomycete growing between le

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maurice pelissier maurice pelissier

BonjourTrouvé dans un torrent de montagne au Chir

29-04-2024 21:51

Mathias Hass Mathias Hass

Hi everyone, Found on attached branches of top pa

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Hamatocanthoscypha ocellata
Nina Filippova, 01-02-2013 09:36
This cups from pine bark fitted about with description of Hamatocanthoscypha ocellata described in Huhtinen (1990). It differs from H. laricionis in broad, biguttulate spores (elliptic), shape of hairs and some other characters. The species reported as being specialised to coniferous bark.

Collected from bark of Pinus sylvestris, 09.09.2012, N60,893086° E68,677082°.

Apothecia cupulate, short-stipitate, whitish, disc smooth, outer surface and edge appear powdery from short hairs, near 200 x 150 mk.

Excipulum textura prismatica, cells about 10 x 7 mk in mid-length of excipulum, becoming near cylindrical in stipe; hairs uncinate, with attenuated slightly curved tips, about 20 x 2,5 mk; asci cylindrical,  clamped, about 30 x 5 mk, with amyloid pore; spores elliptical to obovate, with two round guttules, 5,8 (4,9-7,3) x 2,4 (2-2,7); paraphyses the same length as asci, cylindrical, with 1-2 septa at base, 2 mk broad, occasionally encrusted.

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Hans-Otto Baral, 02-02-2013 16:00
Hans-Otto Baral
Re : Hamatocanthoscypha ocellata
I do not know this species, but your pcs and data resemble indeed very much those on Stip's drawing:

Hamatocanthoscypha ocellata, SH 192-1.JPG

Are you sure you had the spores in KOH? They look as if alive!

Zotto
Nina Filippova, 02-02-2013 19:36
Re : Hamatocanthoscypha ocellata
Yes, it look similar i think. Only I had not seen brown pigments in hairs and excipulum, otherwise coinsides. I thought of H. obsoleta since my spores some smaller than in H. ocellata described, but mine not alive.

No, nothing alive under 1 m deep snow). So, used KOH to rewet them, but guttules still saved, inspite Stip writes "KOH scatters the guttules" (probably since solution is weak).
Hans-Otto Baral, 02-02-2013 21:44
Hans-Otto Baral
Re : Hamatocanthoscypha ocellata
Why shouldn't the spores remain alive under snow? probably they even survive drying for several weeks. How diluted is your KOH? I still think your spore photo shows living spores.
Nina Filippova, 02-02-2013 22:04
Re : Hamatocanthoscypha ocellata
Zotto,

probably i misunderstand, what do you mean by living? They will grow, if there are suitable conditions, e.g. they are dormant (I did not kill them with some chemicals or at flame). But apothecia were collected in september, and were dried. Now i rehydrated them. I am trying to use water for mounts at first, but when tissues are still cohered i add KOH. The solution was prepared in 10% concentration, but later i added more water, so it is some weaker.?

Hans-Otto Baral, 02-02-2013 22:14
Hans-Otto Baral
Re : Hamatocanthoscypha ocellata
Ah o.k., 10% is a rather high concentration. Concentrations of 1% are already toxic within a few seconds. 0.1% I did not test so far, but even there I fear KOH is toxic to fungal cells within perhaps 10-20 seconds.

To examine collections from summer and autumn during the winter months is convenient, I understand very well. But it is very disadvantageous. I regret I still do not have my powerpoint about this online. In any case you will meet living spores in your herbarium specimens. Usually asci etc. do not survive drying for so long, but in all those species that grow on exposed substrate such as attached branches etc. you can study fully alive apothecia even after 1/2 year or more. Only such species are dormant as a whole. The others have only dormant spores but these survive very different periods of time in the dormant state, between a few days up to several years, irrespective of whether they are hyaline or brown, thin- or thick-walled.

When you rehydrate dry living spores they gain their original shape within a few seconds. Of course, germination would take longer, some hours or so.

Zotto
Hans-Otto Baral, 02-02-2013 22:14
Hans-Otto Baral
Re : Hamatocanthoscypha ocellata
Ah o.k., 10% is a rather high concentration. Concentrations of 1% are already toxic within a few seconds. 0.1% I did not test so far, but even there I fear KOH is toxic to fungal cells within perhaps 10-20 seconds.

To examine collections from summer and autumn during the winter months is convenient, I understand very well. But it is very disadvantageous. I regret I still do not have my powerpoint about this online. In any case you will meet living spores in your herbarium specimens. Usually asci etc. do not survive drying for so long, but in all those species that grow on exposed substrate such as attached branches etc. you can study fully alive apothecia even after 1/2 year or more. Only such species are dormant as a whole. The others have only dormant spores but these survive very different periods of time in the dormant state, between a few days up to several years, irrespective of whether they are hyaline or brown, thin- or thick-walled.

When you rehydrate dry living spores they gain their original shape within a few seconds. Of course, germination would take longer, some hours or so.

Zotto
Nina Filippova, 02-02-2013 22:29
Re : Hamatocanthoscypha ocellata
Ok,
so as these specimens were stored only 3 months they could be alive the whole, and spores as well. Alive microscopy - i am willing to follow this rule in next season).