
05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12
Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33
Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00
Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43
me mandan el material seco de Galicia (España)

03-07-2025 18:40
me mandas el material seco de Galicia (España) re

03-07-2025 20:08

I found this interesting yellowish asco growing on

01-07-2025 23:37
Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo

Ascospores in this collection measure (15.6) 16.2 - 19.9 (20.5) × (5.8) 6 - 7.2 (7.4) µm, Q = (2.3) 2.33 - 3.1 (3.4). Me = 17.9 × 6.7 µm; Qe = 2.7. They are first hyaline, then brownish, one-septate, very finely punctate. I have measured the width in the thickest part, not in the constriction.
I am not sure whether to determine it as M. leptosphaeriae or M. sphaeriae. Fungi of temperate Europe state these two taxa are perhaps identical, but Grafenhan et al. 2011 distinguish them as two species. They write: "The distinction between Macroconia leptosphaeriae and
M. sphaeriae is based on the size of ascospores and conidia in the
type collections. According to Wollenweber (1926), the ascospores
of the type material of M. leptosphaeriae are smaller (14–18 ×
5–5.5 µm) than those of M. sphaeriae (19–25 × 5.8–6.5 µm)."
Unfortunatelly I haven´t encountered any conidia, so I have to rely on ascospores. However, my values are between the values for the two species given by Wollenweber. Maybe this author measured dead ascospores (therefore smaller than my vital ones - then my collection would better fit M. leptosphaeriae)?
Thanks, Zuzana


Thank you very much for your reply. No existence of M. sphaeriae would make it much easier.
Zuzana