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01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

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me mandan el material seco de Galicia (España) 

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Castillo Joseba Castillo Joseba

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Xylariaceous fungus on Salix branch
Enrique Rubio, 25-07-2013 18:49
Enrique RubioDear friends

Under a melanized thin, blackish, clypeoid pseudostroma they are these very small, roundish, glabrous, ostiolate perithecia up to 175 microns  in diameter. Single or in groups up to 18-20 confluent perithecia with ostioles that allways are not collectivelly erumpent. I have not seen a true stroma and the peritecia are not in valsoid configuration.

The fungus grew on a corticated branch of Salix lying on the wet ground periodically covered by the fresh water of a lake, together with Lophiostoma appendiculatum. 

The asci are shortly stipitate, up to 90 x 7 (pars sporifera up to 70), 8-spored, with an apical apparatus deeply blue in IKI and Melzer. The brownish fresh ascospores have a conspicuous sigmoid and oblique germ slit; appendages or slimy sheath are absent.

With the keys on Xylariaceous fungi I arrive to the genus Anthostomella but I don't know a good species that fits with my collection


What do you think?

Thanks again
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Alain GARDIENNET, 29-07-2013 09:59
Alain GARDIENNET
Re : Xylariaceous fungus on Salix branch
A Lopadostoma species ?
Enrique Rubio, 29-07-2013 12:47
Enrique Rubio
Re : Xylariaceous fungus on Salix branch
It is another possibility but the perithecia are not in valsoid disposition and the stroma is very much rudimentary.

Thanks Alain