Chaetosphaeria ovoidea - Forum ASCOFrance

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Help with some conidia.

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Chaetosphaeria ovoidea

Thomas Flammer, 28-05-2025 15:19

Substrate: pretty much soaked Fagus wood under newly grown Petasites
Spores : 18.1 - 23.9 x 4.7 - 6.3 ?m - Q: 3.05 - 4.84 (Ø LxB: 21.2 x 5.6 ØQ:3.8 N: 16) (only 3septated spores measured)
Spores : hyalin
Ascus : more or less biseriate, in some case nearly uniserate - overlapping
Congored positiv
Apical apparatus 5 x 3 ym
Perithecia: black, globose, with short neck
Ascus length apprx. 100 - 110 ym
Remarks: some spores are only single-septate, most however 3 septate

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