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07-12-2019 18:45

Laurens van der Linde Laurens van der Linde

Hallo i found the P atrovinosa with a slime specie

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

06-12-2019 19:49

Edvin Johannesen Edvin Johannesen

Hi! Tiny, black, oblong stromata with pure white

27-11-2019 16:54

Rasmus Riis-Hansen Rasmus Riis-Hansen

Hi,I hope you can help med with this disc found a

05-12-2019 09:06

Valencia Lopez Francisco Javier

Hola amigosEstoy buscando este trabajo de la Errot

05-12-2019 19:35

Ibai Olariaga Ibarguren

Dear colleagues, I was wondering if anyone could

19-11-2019 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... under a twig of deciduous tree (likely Quercus

29-06-2011 22:52

Luc Bailly Luc Bailly

Encore trois ascos de la réserve naturelle domani

04-12-2019 13:01

Mirek Gryc

Hello everyoneI inform you in advance that this is

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Strossmayeria on Rubus canes
Enrique Rubio, 06-04-2015 17:25
Enrique RubioHi to all

Few days ago I have found these small fruitbodys growing on old wet stems of Rubus grex fruticosus at the sea level. Here is my description of this fungus.


Apothecia superficial, gregarious, scattered among the blackish brown setae of the conidiophores of a dematiaceous mould (Pseudospiropes?), narrowly turbinate, more or less gelified, whitish to amber color, up to 0.30 x 0.25 mm, substipitate on a short and stout pseudostipe 0.12 high and 0.15 broad. Hymenium flattened, smooth or only slightly pruinose. Margin involute, glabrous, that exceeds the hymenium level. Excipulum glabrous and whitish.


Asci narrowly clavate, inoperculate, unitunicate, 137-182 x 19-20 µm, 8-spored, IKI negative, arising from croziers. Ascospores biseriate, hyaline, smooth, with many small LBs, very polymorphic, ellipsoidal, cylindrical, subfusoid, obovoid, clavate, (19-)30(-38) x (5.2-)6.9(-9.8) µm; Q = (1.9-)4.6(-6.9), with 3(-5-6) cross septa only well visible in Melzer's reactive or congo red. A more or less smooth and complete gel sheath surrounds the fresh ejected ascospores. Paraphyses filiform, septate, not enlarged at their tips or only up to 2-2.5 µm, with cylindrical Vbs. Ectal excipulum textura oblita with cylindrical, elongate, septate, hyaline cells 2-2.5 µm, with a thin gel layer between them, wider at the apothecial base. Medullary excipulum is indistinguishable


The basal region of the ascomata stained blue in IKI. All the apothecial tissues extrude in fresh condition a bright yellow fluid in KOH 10%.


After reading Iturriaga & Korf's paper I don't know a species that fits well with this fungus.


Could you help me?


Thanks again

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Hans-Otto Baral, 06-04-2015 19:53
Hans-Otto Baral
Re : Strossmayeria on Rubus canes
Hi Enrique

I have also my problems with Iturriaga's paper, I never came clear with it. But I have also problems to recognize more than one species in this genus. Maybe ther exist tropical species, but in our region I think it is always S. basitricha. Perhaps until someone finds genetical differences.

Did you see anything that is unusual in your fungus compared to S. basitricha on wood?

I remember an amyloidity of the spores in Iturriaga's paper, am I right? Perhaps to obtain only with overmature dead spores, similar as in D. connivens.
Enrique Rubio, 06-04-2015 20:15
Enrique Rubio
Re : Strossmayeria on Rubus canes

Hi Zotto


Yes. I see some differences with the 'common' basitricha on wood with more septate cylindrical ascospores with a narrower verrucose gel sheath and broader paraphyses tips. I have not seen the amyloid reaction on my fresh spores but I pressume that Iturriaga & Korf's observations were made allways on dried material. 


This picture was take from an old collection from Robinia pseudoacacia


Thanks again


 

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Enrique Rubio, 06-04-2015 20:44
Enrique Rubio
Re : Strossmayeria on Rubus canes
More detail
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Hans-Otto Baral, 06-04-2015 21:57
Hans-Otto Baral
Re : Strossmayeria on Rubus canes
Yes, you are right! Spores and asci distinctly wider, spores 3-6-septate (basitricha 7-septate), warted gel in basitricha....
Enrique Rubio, 07-04-2015 16:51
Enrique Rubio
Re : Strossmayeria on Rubus canes
Thanks again, Zotto