Lasiobolus - Forum ASCOFrance

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Lasiobolus

Malcolm Greaves, 11-12-2015 01:45

This "Lasiobolus" was on rabbit dung. Pale cream 0.15mm across with thick walled septate pointed hairs 110µ long. The spores were 17.5 x 10.5 and smooth.
From what I can see Lasiobolus have non-septate hairs so could someone tell me where I should be looking.
Thanks
Mal

Peter Püwert, 11-12-2015 02:11

Re : Lasiobolus

Hi Malcolm,
these are too few data to determine the species. The shape and size of the Asci are necessary here at all costs. Nevertheless the L. intermedius could be.
Greetings Peter.

Malcolm Greaves, 11-12-2015 09:51

Re : Lasiobolus

Thanks Peter. There is another spcimen growing I will try and get better information from that.
Mal

Michel Delpont, 11-12-2015 10:46

Re : Lasiobolus

Hello Malcolm.

I think your fungus is not mature enough; I seem to discern in the pictures a reddish tint. Also, the hairs Lasiobolus species are normally non-septate.

Michel.

Norbert Heine, 11-12-2015 17:20

Re : Lasiobolus

Nice find, Malcolm!

As Michel said, with septate hairs, this is not a Lasiobolus.
In my opinion this should be Trichobolus dextrinoideosetosus Doveri.
One of the 8-spored species of the genus.

You'll find it here (page 511ff)
http://mycosphere.org/pdfs/MC3_4_No13.pdf

I found this species 11 times in Germany. All on dung of rabbit and hare.
You can compare with my documentation at Pilzforum.eu. There are also some great pictures by Björn Wergen.
http://www.pilzforum.eu/board/thema-trichobolus-dextrinoideosetosus-pilzraetsel-nach-12-jahren-geloest

Regards
Norbert

Michel Delpont, 11-12-2015 18:16

Re : Lasiobolus

Hi Norbert.

I had actually thought about Trichobolus, but not to this species that I have never met; yet I have the paper F.Doveri ..... !! Beautiful pictures of Björn !! Thank you .

Regards.

Michel.

Malcolm Greaves, 12-12-2015 01:03

Re : Lasiobolus

Thanks for the information and link Norbert. With more photos and details Trichobolus dextrinoideosetosus is a very good match. The septate thick walled hairs are certainly dextrinoid and some have a root like base. The asci are clavate 100-120 x 30-34. The paraphyses simple slightly bent towards the apex. Is there anything else that I should check before claiming this species?
Thanks
Mal

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