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Ciboria on litter of Ceratonia siliqua
Stephen Martin, 13-10-2020 00:17
Stephen MartinI was digging through decaying litter of Ceratonia siliqua to find small greyish-beige ascocarps attached to stick, leaves and what looks like the base of a legume. Specimen collected and examined microscopically. They are about 4-5 mm long and diameter anout 1.2 mm. 

Asci 55x65 um long, weakly IKI +ve, opening sometimes with a consticted rim (like a vase) but not sure about this (see images). Base tapering and sinusoidal (croziers?)

Paraphyses 65-85 um long, with slightly swollen and bent apices, numerous.

Spores narrowly ellipsoid  7-8 x 1.5-2.0 um some taking the stain and have two oil bodies at the poles. 

Medullary excipulum subglobular hyphae 12-18um diameter.

I was thiking this is Ciboria, perhaps americana, although this species is reported on decaying fruit and seeds rather on twigs and leaves. Thanks in advance for your suggestions.

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Raúl Tena Lahoz, 13-10-2020 00:45
Raúl Tena Lahoz
Re : Ciboria on litter of Ceratonia siliqua
Hi Stephen
It's a Moellerodiscus... Do you remember this discusión? http://www.ascofrance.fr/forum/34675/ciboria-on-ceratonia-leaves
Well, now I think you have found the one without croziers... This species is probably Ciboria aestivalis, but this still has to be prooved studying the type and then transfer it (or not!) into Moellerodiscus... It is present in many different substrates...
Best regards,
Raúl
Stephen Martin, 13-10-2020 06:53
Stephen Martin
Re : Ciboria on litter of Ceratonia siliqua
Hi Raul,

Thanks for your reply. I feel a bit 'embarassed' for not comparing it well with Moellerodiscus at first place, but my previous collections of Moellorodiscus lenta had an ochre colour (not grey as this) shorter stipes and fruiting in from mid-November (this was relatively early and yes, summerish) that I mistook it as a different Ciboria. Regards the croziers you are right, the base is slightly curved or wavy but no typical croziers. Overall it looked a >bit< different from M. lentus, but then the spores, excipulum, paraphyses, etc. match.


With regards the taxonomy, I assume that it is still referred to as C. aestivalis until further studies. I have dried specimens of this collection which I can send you some, but not many 8 or so. Maybe I dry it and send you few more collection since this complex is quite common under Ceratonia leaf litter.

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