30-04-2024 16:22
François BartholomeeusenDear forum members,On April 25 2024, I found one f
01-05-2024 23:22
Ethan CrensonHi all, Found late last week in a New York City p
29-04-2024 21:32
Robin IsakssonHi! Found in Sweden. Ascomata with haris, se
01-05-2024 12:54
F. JAVIER BALDA JAUREGUIHello, everyone.An idea for this pyreno, I found u
30-04-2024 19:43
Gernot FriebesHi!We observed this hyphomycete growing between le
29-04-2024 21:51
Mathias HassHi everyone, Found on attached branches of top pa
28-04-2024 18:05
Bernard CLESSEBonsoir à toutes et tous,J'ai trouvé ce matin ce
the 'foam-cakes' which can develop in fast flowing streams are a very interesting habitat for the so-called 'Ingoldian Fungi'.
Examples of some of the often distinctive conidia found can be seen here:
http://www.ascofrance.com/search_recolte/3964
http://www.ascofrance.com/search_recolte/3943
http://www.ascofrance.com/search_recolte/3010
Amongst these "aquatic hyphomycetes" one often sees diatoms and other algae, lepidopteran wing scales, pollen etc.; and also chance fungal spores from unknown fungi (which may or may not be aquatic in origin). Normally one ignores these, but occasionally one finds something so striking there may be a hope of getting an identification, even from a single spore. Here is an example of this and I am hoping that such a distinctive spore (which is surely an ascospore - Pleosporales or similar?) will be recognised by someone here. Notable are the large size of the spore and the very distinctive hyaline tips at each end (which are not formed within a single cell - the terminal cells are part-coloured). It may not be evident from the photograph, but the spore is 8-septate.
As ever any suggestions would be very welcome.
Chris
could be an ascospore of Trematosphaeria hydrela.
Best wishes,
Gernot
Exactly !
It's more common to find conidias of the anamorphic stages, ingoldian fungi, but sometimes there are ascospores of the sexual stage. One can also find non-aquatical spores.
Alain
Hi Chris and Gernot,
I fully agree with Gernot: this should be the spore of Trematosphaeria hydrela! I quite often found these species on deciduous wood in rivulets.
Regards from Lothar