Accès membres

Mot de passe perdu? S'inscrire

02-07-2025 18:45

Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

02-07-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

« < 1 2 3 4 5 > »
Pestalotiopsis microspora? growing indoors on an A/C cardboard filter in Miami, Florida, USA.
Wilhelm Guggisberg, 01-04-2023 04:22
Wilhelm GuggisbergThis is the first time I encounter a species of the Genus Pestalotiopsis (Ascomycota, most likely P. microspora) growing indoors in a residential setting. This swab sample was taken from a cardboard air handler filter. The species is very particular due to the fact that is capable of breaking down and digesting polyurethane! Quite a finding!
Swab sample specimen on the optical microscope at 400x stained with Lactophenol Cotton Blue.
Location: Indoor urban area in Miami Shores, Miami, Florida, USA.
  • message #75736
  • message #75736
  • message #75736
Bernard Declercq, 01-04-2023 08:28
Bernard Declercq
Re : Pestalotiopsis microspora? growing indoors on an A/C cardboard filter in Miami, Florida, USA.
Hello Wilhelm,

Can you supply us a description and a photo of the conidia 1000x so that we can see a.o. the appendages in detail?.  The length of the apical appendages is important to differentiate the species from other species. Staining is not useful here.

Regards,

Bernard
Wilhelm Guggisberg, 02-04-2023 05:20
Wilhelm Guggisberg
Re : Pestalotiopsis microspora? growing indoors on an A/C cardboard filter in Miami, Florida, USA.
Immersion oil at 1000x. Characteristics: three-euseptate and pigmented median cells with two to four apical appendages arising as tubular extensions from the apical cell and a centric basal appendage. In the new pic: the reticule bar space is 10u, the approx. spore lenght is 6-7u., the terminal appendages are visible a bit. Hope that helps. -Regards.
Bernard Declercq, 02-04-2023 20:24
Bernard Declercq
Re : Pestalotiopsis microspora? growing indoors on an A/C cardboard filter in Miami, Florida, USA.
Hello Wilhelm, 

I guess the genus name is OK. As I said, the length of the appendages is needed for further identification.

The conidium length is (including both hyaline end cells!) certainly longer than what you mention. We do not have Pestalotiopsis species with such small conidium size here in Western Europe. I am afraid there is something wrong with your scale bar.

According Saccardo's Syll. fung. III, Pestalotiopsis microspora, syn.Pestalotia microspora Speg., has conidia 18-20x5-6 µm and should, as far as your info is correct, be excluded. 

Regards,
Bernard
.