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01-03-2024 18:06

Marc Detollenaere Marc Detollenaere

Dear Forum,On unidentified moss I found some small

01-03-2024 23:06

éric ROMERO éric ROMERO

Bonjour, Sur laissée de mustélidé indeterminé

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Bernard Declercq Bernard Declercq

Hello,I am looking for a pdf of following paper:Ud

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Charles Grapinet Charles Grapinet

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Yannick Mourgues Yannick Mourgues

On Fagus decorticated wood near a stream. Diametr

29-02-2024 16:43

Malcolm  Greaves Malcolm Greaves

Can someone suggest what this might be. It is deve

25-02-2024 19:50

Robin Isaksson Robin Isaksson

Found this one 3-4 times on resin in SwedenAsci IK

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me mandan el material seco de Galicia España reco

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Trichophaea-like
Stefan Jakobsson, 08-12-2023 01:32
Now is the time of the year to have a look at old specimens. Here a 25 years old Trichophaea-like fungus, which is causing problems. It was growing among forest debris on calcareous soil in west central Finland. All photos of dead material.

The apothecia were whitish grey when fresh, now they are 1-2 mm wide. The hairs have a simple to furcate base, bringing Scutellinia to mind, the length is up to 700 µm. The ectal exipulum brings Trichophaeopsis to mind. The spores are 17.1-19.4 × 8.4-10.3 µm, Q on avg. 1.88, probably faintly ornamented. The paraph. tips are 4.5-6 µm wide.


Any help much appreciated!

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Nicolas VAN VOOREN, 08-12-2023 08:02
Nicolas VAN VOOREN
Re : Trichophaea-like
Hello.
You should read this paper: https://doi.org/10.25664/ART-0315
There are several keys that could help you.
Stefan Jakobsson, 08-12-2023 13:44
Re : Trichophaea-like
Are you thinking of Lasiobolidium boudieri? I had already compared to that one but rejected the hypothesis for several reasons. My spores seem to have a large guttule, so I thought there has been one or more guttules also in the livig state while mature spores of boudieri should have no guttules. Also the spore width is smaller than in your description. The hair bases are not either very clear. And the norternmost known boudieri is so far from Denmark. It is a very long way from Denmark to central Finland.

Or do you have something else in mind?

Stefan Jakobsson, 14-12-2023 01:44
Re : Trichophaea-like
Here one more similar fungus, collected in southern Finland 27 years ago. On elk dung. This should definitely be a Lasiobolidium. Let us call this one specimen B and the one above specimen A, if commenting.

Dry apos are up to 2 mm wide. The marginal hairs are up to 1000 µm, with a bulbous or tapering base, no furcation observed. The margin has "pseudopoils" to 125 × 31 µm. The spores are 15.0-17.2 × 8.1-9.4 µm, eguttulate, Q on avg. 1,84. 8-spored asci.


L. macrocystis should have hairs with a furcate base and slightly larger spores. The spores are somewhat small, but I suppose this one must belong to the L. coprophilum complex. Right?

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Nicolas VAN VOOREN, 19-12-2023 11:35
Nicolas VAN VOOREN
Re : Trichophaea-like
Undoubtfully this second collection belongs to L. coprophilum complex.
For the first one, it is a bit more difficult because we cannot see the content of spores in living state, but probably also a Lasiobolidium species
Stefan Jakobsson, 20-12-2023 01:24
Re : Trichophaea-like
Excellent, thank you for your opinion!

Oddly enough, in the same box with specimens of Pezizles from the nineties I found tonight still a third one related to the other two, specimen C.


This one was growing inside a hollow trunk of Populus laurifolia very recently logged, in a park in western Finland. The two apos are now 3,5 and 5 mm in diameter. My notes say the hymenium was somewhat yellowish when collected. They are growing on a thick white hyphal mat. I don't know does the mat belong to this species or perhaps to Rigidoporus populinus growing close by; at least there are no clamps.


The marginal hairs are up to 1400 µm, almost all hairs with a bulbous base and in addition a few hairs of the Trichophaeopsis type with the base "in the middle". There were also some ±clavate thick-walled "pseudohairs" with light brownish walls, up to 190 × 56 µm. The spores are smooth, eguttulate, 17.7-22.1 × 10.0-12.7 µm, Qm = 1.75. Asci 8-spored.


I presume this one does not have a name.

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Nicolas VAN VOOREN, 20-12-2023 07:50
Nicolas VAN VOOREN
Re : Trichophaea-like
This third species seems to be Lasiobolidium boudieri
Stefan Jakobsson, 20-12-2023 15:44
Re : Trichophaea-like
Thank you again! The reason I excluded L. boudieri was "L. boudieri [...] can be distinguished by the absence of large marginal macrocells". But other than that it is a fairly good match, even though the spores are somewhat large.