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07-02-2023 22:28

Fracchiaea callista? on Carpinus
Ethan Crenson

Hello friends, On Sunday, in the southern part of

19-02-2026 17:49

Ayuda con Tarzetta sp
Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

19-02-2026 13:50

Hairy disc on wood
Margot en Geert Vullings

We found this collection on deciduous wood on 7-2-

19-02-2026 12:01

Ayuda con esta
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia (España), recole

17-02-2026 09:41

Diaporthe spiculosa?
Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

16-02-2026 21:25

Pyreno in the bark of Lonicera xylosteum
Andreas Millinger Andreas Millinger

Good evening,failed to find an idea for this fungu

08-12-2025 17:37

Cucurbidothis parmeliarum (pithyophila var. cembrae) - on Abies
Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

17-02-2026 17:26

Recherche biblio Lambertella WHETZEL 1943
Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous, Je recherche cette publication :

03-02-2013 19:50

Helotium schimperi
Nina Filippova

Good time), I've compared this specimen with the

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Tarzetta betulicola?
Stefan Jakobsson, 13-06-2020 21:22
Here a Tarzetta #1 growing with Betula and some Syringa, Spiraea, Ribes and 10 m away also some modest Picea, on soil at the verge of a garden. The width is maximum 21 mm and at the base with a stipe, thin and only one or two mm visible before being covered with soil. 8-spored, no croziers. The paraphyses are cylindrical, not enlarged at apex and rarely with some nobs or somewhat enlarged at septa, regularly branched but not close to the apex. The spores are

(18.3) 18.9 - 21.2 (21.9) × (10.1) 10.7 - 11.6 (12.0) µm
Q = (1.6) 1.7 - 1.9 (2.0) ; N = 32
Me = 20.1 × 11.1 µm ; Qe = 1.8.


Could this be T. betulicola ad int.? Southern Finland.


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A week ago this had only a few mature spores but then they were of a more fusoid shape than today.

  • message #63670
  • message #63670
Stefan Jakobsson, 13-06-2020 21:24
Re : Tarzetta betulicola?
This one #2 was growing alone some five meters away from the previous ones. It is very similar to #1 but somewhat bigger, 31 mm diam., a little bit lighter in colour and the spores are slightly bigger:

(19.4) 20.2 - 22.4 (22.7) × (11.3) 11.6 - 12.95 (13.0) µm
Q = (1.5) 1.7 - 1.86 (1.9) ; N = 34
Me = 21.4 × 12.2 µm ; Qe = 1.8


I did not observe any knobs on the paraphyses. Probably the same as #1?

  • message #63671
  • message #63671
Nicolas VAN VOOREN, 20-06-2020 19:42
Nicolas VAN VOOREN
Re : Tarzetta betulicola?
Dear Stefan,
T. betulicola is a provisional name, just a hypothesis within the T. catinus/pseudocatinus complex. Your data may correspond to this "species" based on the ecology, spore shape and size. A DNA analysis is required to confirm.