Pyreno on Sambucus - Forum ASCOFrance

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Pyreno on Sambucus

Gernot Friebes, 21-07-2012 23:04

Hi,

we are looking for help with this quite conspicuous pyrenomycete collected on Sambucus.
Ascospores: 23-30 x 8,5-10 µm, brown when mature, smooth-walled but sometimes with a gel coating, with 3 to 5 pseudo-septa. Asci: 200-240 x 11-12 µm, 8-spored, uniseriate, long cylindrical, unitunicate, with a somewhat thickened apical apparatus which reacts blue in Lugol. Hamathecium: consists of numerous hyaline, septate paraphyses.

Thanks for any help!

Best wishes,
Gernot

Björn Wergen, 22-07-2012 00:46

Re : Pyreno on Sambucus

Servus Gernot,

I think this is a member of Annulatascaceae, it has similarities with Annulusmagnus triseptatus, but this species should have a "real" apical apparatus which gets a red colour in Lugol.

regards,
bjrön

Bernard Declercq, 22-07-2012 11:41

Re : Pyreno on Sambucus

Hi Gernot,

I think this is Lepteutypa hederae (Fuckel) Rappaz, a taxon originally described on Viburnum but mostly (in my region) collected on Sambucus nigra.

Best regards,

Bernard

Gernot Friebes, 22-07-2012 12:43

Re : Pyreno on Sambucus

Hi Björn and Bernard,

thank you for your suggestions! I think Lepteutypa fits very well for what I have seen here: http://www.bcrc.firdi.org.tw/fungi/fungal_detail.jsp?id=FU200802060062 (different species though). Could someone please provide me a description of L. hederae? I found no literature on this species...

Best wishes,
Gernot

Martin Bemmann, 22-07-2012 12:55

Re : Pyreno on Sambucus

Hi Gernot,

check this link:
http://doc.rero.ch/lm.php?url=1000,43,2,20120711163638-QJ/rap_ant.pdf?

Regards,

Martin

Gernot Friebes, 22-07-2012 13:08

Re : Pyreno on Sambucus

Thank you very much Martin, great to see this work available online!

Best wishes,
Gernot

Martin Bemmann, 22-07-2012 13:14

Re : Pyreno on Sambucus

On the same server I found also his work on Diatrypacées à asques octosporés:

http://doc.rero.ch/lm.php?url=1000,43,2,20120511100432-HA/rap_tnd.pdf?

Gernot Friebes, 22-07-2012 13:19

Re : Pyreno on Sambucus

one more question: Rappaz gives "transversal septa 3 rarely 1 or 2" for the ascospores and "apical ring I-" which disagrees with our collection. It would be great if someone who already examined this species could bring in some personal experience concerning these characteristics.

Best wishes,
Gernot

PS.: @Martin: I already have the part on the Diatrypaceae but it's always nice to find these works as PDFs (fewer books when traveling :-)).

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