Dear Aleksandra Wójcik

I mean probably  a representative of  family Dematiaceae  (an imperfect microfungi having dark-colored hyphae or conidia).

Hi: I think is a specis  of Chalara  spp

I do agree with Vladimir Ostry - for sure this is a fungus out of the Dematiaceae. But it is difficult to identify it on a smashed preparation. Please offer a prepared conidiophore with young developping conidia. And what is the background - from which source did you isolate this species.  For me - but sorry this is only a suggestion - not scienfically sound - it looks like a species fo Stachybotris .... send in a further picture and then we can further discuss this. Best wishes - Heinz-W.

It could be arthroconidia chains of Aureobasidium pullulans (Scytalidium). This is just a guess, but definitely something with melanized hyphae and conidia...

Thanks for answer. I do inoculation selective, because certainly there are two genus of molds. I'm more interested in the chain. 

I watched chains in Ulocladium, but this chain seems different.

Hi!

it looks like Cladosporium. The best way to recognize the genus is by the prominent scars on the spores. spore are one or two celled. However, find the conidiophores and conidiogenus cells to confirm the identity

I agree with Miloš Stupar.

Yes, probably the secand genus is Cladosporium, Thanks Franci and Milos for suggest.

I agree with H. W. Dehne. It looks like Stachybotris.

Dear colleagues, on the attached microscopic pictures you can see a big difference between genera Aureobasidium and Stachybotris.

I agree with Franci Aco Celar, This is not Stachybotrys. Stachybotrys is a pictures. 

I agree with Senthilarasu. It looks like Cladosporium or some Cladosporium-like genera. I think that scars can be observed on melanized conidia in the second picture.

The first picture is probably Cladosporium cladosporiodes, certainly not Thielaviopsis. If you look closer on the seemingly open distal end of the conidiophor you will discover 2 subapical tiny scars, that correspond to the scars of the conidia, which are one-celled in this species as a rule. The second picture is typical Aureobasidium pullulans with conidia formed directly as lateral buds from chlamydospore-like cells.

Yes, I agree the first picture is Cladosporium spp. or Cladosporium like spp.!

Hi,

Attempts were taken from the air in greenhouses and orangeries.

Thanks for a answers.

Hi. I agree that this dematiaceus fungi look like Cladosporium spp.

First think, you must be sure that doon´t have any contamination ... the hypha looks as some pictures of Scytaliudium´s colonies in agar, but you have a lot of conidia of Cladosporium s.l., which is quite common in aerial samples....for Cladosporium see the Studies in Mycology # 67 and #72, from CBS-KNAWL Fungal Biodiversity Center