Troposporella fumosum => Troposporella monilipes

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Troposporella fumosum => Troposporella monilipes

Riet van Oosten, 16-01-2023 21:31

Hello,

Nearby the find of Calycina claroflava on Populus x canescens (by Rene Hoogenboom) I found this nice hyphomycete.

Could this be Troposporella fumosum?

Greetings, Riet

Chris Yeates, 17-01-2023 23:12

Re : Troposporella fumosum? on Populus x canescens

Hi Riet

It looks close. Have you eliminated Troposporella (Helicoma) monilipes?

Do you have access to:

Goos RD (1986) A review of the anamorph genera Helicoma. Mycologia 78:744–761

Helicosporous hyphomycetes from China (2007) Fungal Diversity

Regards

Chris

Riet van Oosten, 18-01-2023 08:12

Re : Troposporella fumosum? on Populus x canescens

Hi Chris,
I used the key on page 147 and I think I see conidiophores constricted at septa
https://www.researchgate.net/publication/227251734_Transfer_of_two_Helicoma_species_to_Troposporella_based_on_molecular_and_morphological_data
and this figure
https://www.researchgate.net/figure/Cultures-and-specimens-of-Troposporella-species-included-in-this-study-Ellis-1971-Goos_tbl1_227251734
In this topic I found a link
http://www.ascofrance.com/search_forum/14326
But difficult to tell.

Hardware Tony, 18-01-2023 19:43

Re : Troposporella fumosum? on Populus x canescens

Hi Riet,
Looking at the colour and size of the conidia spirals they seem to match T. monilipes more - dark brown and 12-19µm, whereas T. fumosa are Golden Brown and 12-16. Your images here against the scale provided suggest 19-20 plus at the high end. Also not constricted and although difficult to judge without seeing T. fumosa I would expect more constriction. Probably added to the confusion!

Best wishes Tony

Riet van Oosten, 18-01-2023 19:54

Re : Troposporella fumosum? on Populus x canescens

Hi Tony,

Thank you so much for your help/explanation! I had no idea how or what to measure.

Best wishes, Riet