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anamorph-spores in corticioid fungus
Lothar Krieglsteiner, 19-05-2018 17:51
Lothar Krieglsteiner

.. in the Bavarian Forest. The corticioid fungus was totally destroyed and old, but there were a lot of anamorphic spores like those in the pictures. Does somebody have an idea which fungus has such conidia (they measure about 55-65/8-9 µm(?


Best regards, Lothar

  • message #53506
  • message #53506
Hans-Otto Baral, 19-05-2018 17:55
Hans-Otto Baral
Re : anamorph-spores in corticioid fungus
Erinnert mich an Helminthosporium.
Peter Thompson, 19-05-2018 17:58
Re : anamorph-spores in corticioid fungus
Hello Lothar,

It might be worth looking at Sporidesmium coronatum. The colour and size of conidia seem right.

With Best Wishes,
Peter.
Lothar Krieglsteiner, 19-05-2018 18:11
Lothar Krieglsteiner
Re : anamorph-spores in corticioid fungus

Thanks to you both for your suggestions :-)


Best regards from Lothar

Hans-Otto Baral, 19-05-2018 20:42
Hans-Otto Baral
Re : anamorph-spores in corticioid fungus
Sporidesmium seems indeed another option. In Genera of Hyphomycetes, however, that genus has euseptate conidia while Helminthosporium is distoseptate. I am not really familiar with these fungi, but for me Lothar's conidia look distoseptate. If I am wrong, I would like to know the arguments.
Zotto
Peter Thompson, 19-05-2018 22:02
Re : anamorph-spores in corticioid fungus
Hello Lothar and Zotto,

The conidia of Sporidesmium species can vary considerably in appearance.

When I considered the options, I was able to key out in Sporidesmium to S. coronatum and the photographed conidia strongly resemble those drawn by Ellis & Ellis for this species. Wood and bark would be the usual host type.

For Helminthosporium, the closest species for keying out seems to be H. solani. The conidia do look very similar, but the host Solanum tuberosum is strongly linked to this taxon. 

I assume that there were no conidiophores found?

With Best Wishes,
Peter.
Lothar Krieglsteiner, 20-05-2018 09:01
Lothar Krieglsteiner
Re : anamorph-spores in corticioid fungus

Hello Peter,


no - I only found the conidia. And I think your suggestion is very good. So, I name the specimen with "cf." with this name.


Thanks again very much and best regards from Germany


Lothar