Tarzetta betulicola? - Forum ASCOFrance

19-01-2026 12:01

Ayuda con esta 1121

Castillo Joseba

Me mandan el material seco de Galicia (España)

17-01-2026 19:35

Cosmospora aurantiicola: Gibt es dazu Literatur ?

Arnold Büschlen

Hallo, ich suche zu Cosmospora aurantiicola Lite

15-01-2026 15:55

pyrenomycete on Quercus

Lothar Krieglsteiner

this one is especially interesting for me because

16-01-2026 00:45

Hyphodiscus (?) on hardwood, hemiamyloid, staining reddish-orange

Ethan Crenson

Hi all, On decorticated hardwood from a New York

18-01-2026 12:24

Anamorph on an olive tree

Josep Torres

Hello.An anamorph located on the surface of a thin

17-01-2026 10:41

Pulvinula

Blasco Rafael

Hola, he descubierto que he creado una Pulvinula t

08-12-2025 17:37

Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

16-01-2026 11:20

Una para ID

Castillo Joseba

Me mandan el material seco de Galicia (España)

10-01-2026 20:00

Lichenicolous fungus on Protoparmeliopsis muralis

Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

13-01-2026 07:28

Chlorociboria glauca on indet. decorticate hardwood log - 303627368

Danny Newman

Chlorociboria glauca on indet. decorticate logThe

« < 1 2 3 4 5 > »

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.

-----

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

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?

Nicolas VAN VOOREN, 20-06-2020 19:42

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.

Accès membres

Forum AscoFrance