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28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

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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.