24-11-2025 15:23
Arnold BüschlenHallo, auf einer offenen Kiesfläche am Rande ein
23-11-2025 11:16
Bohan JiaHi, I found small discs growing on dead stem of
21-11-2025 10:56
Christopher Engelhardt
Very small (~0,5 mm) white ascos, found yesterday
21-11-2025 11:52
Jean-Luc RangerBonjour à tous, on voit toujours 2 espèces areni
Black perithecia with long necks: 270-340um diameter + 390-500 x 95-120um neck.
They grow in groups of 2-15 individuals, around the presence of another ascomycete (Tympanis alnea). They grow without anastomosing or at the most 2-3 perithecia together. The necks are long and obliquely develop. They are errumpent beneath the bark.
The substrate is Pyrus sp.
I think it might be Calosphaeria. Perhaps C.pulchella, but the spores seem somewhat greater.
Can someone help me identify it correctly?
Thanks in advance.
Susana
this is Calosphaeria princeps, which has a bit longer ascospores than C. pulchella. More collections have to be examined to find out if both species should be separated in future.
regards,
björn
a greeting
Susana