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03-02-2026 20:44

Zetti Mario

When I first saw this white mould on an Agaricus s

18-08-2025 15:07

Lothar Krieglsteiner Lothar Krieglsteiner

.. 20.7.25, in subarctic habital. The liverwort i

02-02-2026 21:46

Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

02-02-2026 14:55

Andgelo Mombert Andgelo Mombert

Bonjour,Sur thalle de Lobaria pulmonaria.Conidiome

02-02-2026 14:33

Andgelo Mombert Andgelo Mombert

Bonjour,Sur le thalle de Peltigera praetextata, ne

31-01-2026 10:22

Michel Hairaud Michel Hairaud

Bonjour, Cette hypocreale parasite en nombre les

02-02-2026 09:29

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pour cette récolte de 2

01-02-2026 19:29

Nicolas Suberbielle Nicolas Suberbielle

Bonjour, Marie-Rose D'Angelo (Société Mycologiq

30-01-2026 22:49

éric ROMERO éric ROMERO

Bonjour tous, Récolté dans les Vosges le 22/10/

31-01-2026 09:17

Marc Detollenaere Marc Detollenaere

Dear Forum,On decorticated wood of Castanea,I foun

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Aspergillus sect. fumigati
Stephen Martin Mifsud, 26-12-2019 16:05
Stephen Martin MifsudI was trying to recultivate a species of Talaromyces growing on Washingtonia seeds fallen on the soil. The seeds and specimen was dried at room temp. Months later, I tried to recultivate the Talaromyces from the seed husks, kernels, etc and I got instead a range of interesting microfungi including three Aspergillus sp.

One of them formed white colonies, fast growing at 24C but on a closer look they had few grey-green conidiophores with shortly columnar conidial heads. The Vesicles were subglobular, 10-18um wide, with one series phialides about 6um long, emerging from about 2/3 of the vesicle (not fully radiating). Conidia in dense inticated chains forming 50-80um columnar or subglobose  heads, each conidiospore 2.5um, sphereical, greyish-green. Conidiophores smooth, 60-120um long, 5-7um wide, somewhat expanding below the vesicle (but not always),

Also present where clesitotheca producing hundreds of globulae asci holding 8 ascospores. There where about 5-6um wide with their characteristical two radial wings and what I think to have seen under x1000 oil immersion, spines or warts on the dorsal/ventral side.

With the data available, I have thought the species is Aspergillus sect. fumigati, and despite not having an electron microcope to see the ornamentation of the ascospores, I think the warted surfaces and other characters collectively lead to the species pseudofisheri.

The colonies on OAT, PDA, CZ and MEA where overall white (much more green in A. fischeri) 

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