Observation 29311: Trametes pubescens (Schumach.) Pilát

When: 2009-11-20

Collection location: Bovec basin, East Julian Alps, Posočje, Slovenia [Click for map]

Who: amadej trnkoczy (amadej)

No specimen available

I can’t come up with a satisfactory determination. Seems too thick to be Trametes pubescens and in cross section not like Bjerkandera fumosa (as the closest two options I found)?

Lat.: 46.34076 Long.: 13.58089
Code: Bot_402/2009-1088

Habitat: North oriented, cut down mixed forest slope of a foothill, cretaceous clastic rock (flysh), partly sunny, exposed to direct rain, average precipitations ~3.000 mm/year, average temperature 8-10 deg, elevation 560 m (1.840 feet), alpine phytogeographical region.

Substratum: a rotten trunk of a down Betula pendula.

Place: Bovec basin, foothills of Mt. Svinjak 1.965 m (6.447 feet), north of village Kal-Koritnica, East Julian Alps, Posočje, Slovenia EC

Nikon D700 / Nikkor Micro 105mm/f2.8



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Those nematodes
By: Irene Andersson (irenea)
2009-12-01 17:04:35 CST (-0500)

could be fungi specific, but can also be parasiting particular insects.
Very interesting observation – nematodes are commercially used against slugs and flies to protect plants, and these might even act as an army protecting the fungus, who knows..?

context thickness
By: amadej trnkoczy (amadej)
2009-12-01 15:00:16 CST (-0500)

Thank you Irenea.

The same is in my book (A.Bernicchia, Polyporaceae s.l., Fungi Europaei 10, Edizioni Candusso (2005), Italy) – 5mm max flesh and 5mm max pore layer. However, on page 774 Bernicchia has a picture which shows fairly similar fungi to my photos. They are almost surely thicker than what is written in the text of the book. I measured one larger (not the largest I’ve seen!) sample of my observation I keep at home. Context is 15 mm thick and pore layer 8 mm. That was a too big discrepancy for me a fungi newbie to accept T. pubescens – this is my first one :-).

You are right with respect to insects. There were many. I tried to get spore print to measure spores, but there was no good one. I found only a few spores of uncertain origin in the ‘dirt’ I put under the scope, but there was zillion of tiny ‘snakes’ a few hundred microns long (pictures added). What are these? Nematodes, or insects’ larvae, or something fungi specific?

I’d like
By: Irene Andersson (irenea)
2009-12-01 13:22:43 CST (-0500)

to call it Trametes pubescens, with unusually well developed fruitbodies.
My books say flesh up to 5 mm thick and pores up to 4 mm, but I have seen them thicker than that (they shrink considerably on drying). The most common host for it, is Betula, and I can see a typical character – it’s quickly invaded by insects. I think that’s why larger fruitbodies are so rarely seen.

Created: 2009-12-01 12:51:15 CST (-0500)
Last modified: 2009-12-01 12:51:15 CST (-0500)
Viewed: 293 times, last viewed: 2018-08-14 15:45:08 CDT (-0400)
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