27/Sep/2025, 2:42 PM
Laiaküla raba, Tallinn, Harju, Eesti
Deciduous boggy forest, on dry birch branch under bark
59°28'03.2"N 24°53'26.9"E
🌡️ 14°C 🌤️ Passing clouds 💨 Wind 30° NNE->SSW, 11 km/h
Original Instagram postDiatrype undulata
- Scientific identification
- Diatrype undulata (Pers.) Fr.
- Family
- Diatrypaceae
- Class
- Sordariomycetes
- Genus
- Diatrype
Names across languages
- German: Flaches Birkeneckenscheibchen
- Russian: Диатрипе волнистая
The scientific profile
From the latest record: 2025-09-27.
Fruit body
Thin, flat to slightly raised carbonaceous stromata forming crust-like patches on bark of dead branches, stromata are blackish, with a whitish entostromal layer underneath
Perithecia
Perithecia immersed to erumpent, arranged singly, often with black sulcate ostioles visible on surface of stromata
Hymenium Attachment
N/A
Stipe
N/A
Description
Spores dispersed from perithecia
Ecology
Parasite, pathogen, saprobe on birch (monophagous on Betula spp.) branches, especially dead or dying bark
Edibility
Inedible, microscopic
Fruit body
Dimensions: Stromatal patches can cover branch surfaces; perithecia ostioles about 5–7 µm wide by 75–95 µm long in stalk length
Dimensions
Crust width: Extent variable depending on branch area
Microscopy
Microscopic features:
Description
Asci: Long-stalked, 8-spored.
Description
Ascospores: Allantoid, pale olivaceous, ~ 5–8 × ~1 µm
Overview
Appears as thin, blackish crusts on dead birch branches. The fruiting bodies (perithecia) are embedded in stromata, with visible, often sulcate, black ostioles.
1849). Summa Veg. Scand., Sectio Post. (Stockholm): 385.
Field encounters
Source hashtags
#hongos #diatrypeundulata #diatrype #diatrypaceae #xylariales #sordariomycetes #ascomycete #flachesbirkeneckenscheibchen #birkeneckenscheibchen #mushroomphoto #fungiphoto #fungimacro #naturephotography #seenefotod #pilzefotografieren #фотогрибов #sieniäkuvia #houby #mycology #fungistudy #mushroom #fungi #woodfungi #sacfungi #seened #pilze
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