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15-12-2025 15:48

Danny Newman Danny Newman

Melanospora cf. lagenaria on old, rotting, fallen

15-12-2025 15:54

Johan Boonefaes Johan Boonefaes

Unknown anamorph found on the ground in coastal sa

15-12-2025 21:11

Hardware Tony Hardware Tony

Small clavate hairs, negative croziers and IKI bb

15-12-2025 07:09

Danny Newman Danny Newman

indet. Rutstroemiaceae sp. on unk. fallen leavesMc

15-12-2025 21:47

Pol Debaenst

Good evening, On 12/11/2025 I found ascomycetes w

15-12-2025 07:05

Danny Newman Danny Newman

Pseudosclerococcum golindoi (det: Zotto)near Cosb

15-12-2025 11:49

Danny Newman Danny Newman

ITS sequences from the following two collections B

15-12-2025 12:34

Danny Newman Danny Newman

indet. Rhytismataceae on oak leafnear Purchase Roa

09-12-2025 12:06

Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche l'article concernant Hypobryo

13-12-2025 17:26

Buckwheat Pete

Hello everyone,I have a rather interesting ascomyc

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Ciboria americana?
Raúl Tena Lahoz, 16-09-2010 11:15
Raúl Tena LahozHi again!
Yesterday I found this Ciboria on a Quercus pyrenaica stromatized fruit. A stromatized area can be found at the base of the apothecia. Because Ciboria batschiana has always two nucleus?, it cannot be my species. I see that there is other species on the same host: Ciboria americana. So my question is if mine can be Ciboria americana.
Spores with one nucleus: 9-12 x 4-5 µm, nearly no oil drops, with spore sheath.
Paraphyses with one large refractive VB in the upper segment, width up to 4-5,5 µm.
Subhymenium slightly brown-pigmented, reactng light blue in IKI and enhanced in IKI after KOH.
Medulla: more or less hyaline textura intricata parallel to hymenium, also a bit reacting light blue in IKI but only noticed after KOH.
Asci: up to 95 x 9,5 µm, arising from croziers, euamyloid, Sclerotinia-type.
Ectal excipulum composed by pigmented (brown-reddish) rounded cells which protrude at margin and in outermost cells. Some bear VBs. No reaction in IKI, even after KOH.
I think there is enough data in the PDF file, but I have more photos if you need.
Thanks in advance,
Raúl.
Hans-Otto Baral, 16-09-2010 12:56
Hans-Otto Baral
Re:Ciboria americana?
Yes, C. americana has binucleate spores in my experience, also usually rather long apo-stipes. I think it is C. americana.

The VBs coagulate when the cells die, yes, later they might get brownish by oxidation.

Your "dead" paraphyses are eprhaps only young ones without VBs. Look vacuolated.
Zotto
Nicolas VAN VOOREN, 16-09-2010 13:13
Nicolas VAN VOOREN
Re:Ciboria americana?
Here is a picture of Ciboria americana, collected on chesnut (Castanea sativa), in Corsica, october 2009.
  • message #12882
Raúl Tena Lahoz, 16-09-2010 14:54
Raúl Tena Lahoz
Re:Ciboria americana?
Thanks Zotto
I guess that where you say: "Yes, C. americana has binucleate spores in my experience, also usually rather long apo-stipes.", you wanted to say: "Yes, C. batschiana has binucleate spores in my experience, also usually rather long apo-stipes."
Mine are not binucleate.
Also, Ciboria americana has long stipe?

Merci Nicolas
Spores where binucleate in your collection?

Raúl
Hans-Otto Baral, 16-09-2010 21:10
Hans-Otto Baral
Re:Ciboria americana?
you are right, Raul, and I will not change that, otherwise your answer becomes weird. :-)

Obviously there are also long stipes possible. Have you a microphoto or drawing, Nicolas?

Zotto