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24-08-2020 13:00
![Yulia Lytvynenko](/uploads/user_vgn/Lytvynenko-0001.jpg)
Dear friends.Looking for a copy of the following w
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11-07-2024 14:29
![Viktorie Halasu](/uploads/user_vgn/Halasu-0001.jpg)
Hello, a thin-fleshed Mollisia on a monocot stem
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14-07-2024 18:23
Joaquin MartinHi,I found this Ascomycete on horse dung.The spora
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13-07-2024 19:50
![Zuzana Sochorová (Egertová)](/uploads/user_vgn/Egertova-0001.jpg)
Hello,I have identified this fungus as Hamatocanth
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11-01-2022 16:36
Hi does anyone have a digital copy of Raitviir A (
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08-07-2024 23:34
Villalonga PacoSmall Scutellinia growing in garden soil (calcareo
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12-07-2024 02:12
Stefan JakobssonOn a wet lake shore I found a single minute apothe
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11-07-2024 10:57
![Viktorie Halasu](/uploads/user_vgn/Halasu-0001.jpg)
Hello, I have here a Mollisia on a leaf (possibly
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07-07-2024 10:07
Thomas FlammerI am struggeling with some tiny yellowish apotheci
Spore measurements:
(13.5) 14.6 - 17.6 (18.1) × (2.8) 3.2 - 4 (4.2) µm
Q = (3.4) 3.9 - 5.3 (5.8) ; N = 20
Me = 15.9 × 3.6 µm ; Qe = 4.5
The old paper The genus Mitrula in North America (1977) doesn't seem to clearly key out this specimen. Either this is M. paludosa or M. borealis. The spore measurements would fit M. borealis slightly better, but the spores didn't appear to have a sheath (fresh spore deposit), which might favour M. paludosa.
Any opinions?
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)
Mitrula borealis seems to be very common in SW Finland, perhaps more so than M. paludosa. Some of my observations are recorded here, but I have many more:
https://laji.fi/observation/list?target=mitrula%20borealis
A few weeks ago I collected a Mitrula with spores even broader than borealis according to the Redhead paper. I don't know is it a borealis or still a new one.
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)
About macroscopic differences I am not sure but the working hypothesis is that borealis is more yellow and perhaps bigger. Paludosa might have more brownish tints in the hymenium and pehaps not so elongated hymenial head as borealis.
Likewise, about ecology I have only a working hypothesis: borealis might be more common in spring fed small streams or pools while paludosa is found in any pool or ditch. All acid, virtually no calacreous sites where I collect.
The sequenced one is this:
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)
![Zuzana Sochorová (Egertová)](/uploads/user_vgn/Egertova-0001.jpg)
interesting topic! I must admit I have automatically identified all my Czech collections as M. paludosa. In Czech literature, I haven´t found a mention about M. borealis, but I can see that Redhead mentions occurrence in the neighbouring Germany.
I wonder how often is M. borealis collected in this region...
Yesterday I found Mitrula in the Jeseníky Mts., so I made the first microscopy of it in my life, and it fits better M. paludosa, especially if Redhead worked with dead material. In any case, the are thinner than those in the collections from Finland presented here. Living ascospores measure (13)14.1-18.2(19.2) × (2.8)3-3.6 (3.8) µm, Q = (3.8)4.2-5.6(6.2), n = 40. Me = 15.8 × 3.3 µm; Qe = 4.8. Gelatinous sheath not observed.
Best regards, Zuzana
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)
![Zuzana Sochorová (Egertová)](/uploads/user_vgn/Egertova-0001.jpg)
Spores:
(17.3) 18.1 - 21.3 (22.9) × (2.8) 3 - 3.5 (3.8) µm
Q = (4.6) 5.4 - 6.7 (6.8) ; N = 20
Me = 19.6 × 3.3 µm ; Qe = 6
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)