Accès membres

Mot de passe perdu? S'inscrire

26-01-2026 11:49

Anamorph on Cytisus
Margot en Geert Vullings

We found this possible anamorph on a dead Cytisus

25-01-2026 23:23

Delitschia/Lojkania? on wood
Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

18-01-2026 12:24

Anamorph on an olive tree
Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

25-01-2026 16:08

Geoglossum
Malcolm Greaves Malcolm Greaves

This Geoglossum had spores mostly 70-80 (87) with

23-01-2026 21:50

Looking for a paper please
Cameron DK

I am looking for this please publication. is anyon

10-01-2026 20:00

Lichenicolous fungus on Protoparmeliopsis muralis
Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

21-01-2026 19:55

Nemania aureolutea?
Bohan Jia

Hi,  Could this be Nemania aureolutea? Or did I

21-01-2026 16:32

Lichenicolous coelomycete
Gernot Friebes

Hi,I need your help with some black dots on a lich

21-01-2026 16:48

Hyphomycete on Rubus fruticosus agg.
Gernot Friebes

Hi,after my last unknown hyphomycete on this subst

20-01-2026 17:49

Mollisina acerina ?? Turbinate and hemiamyloid
Hardware Tony Hardware Tony

I offer this collection as a possibility only as e

« < 1 2 3 4 5 > »
Rythismataceae
Garcia Susana, 25-03-2015 23:19
Hi all:

I found this ascomycete growing on stem of Equisetum arvense.
0.5 to 1 mm are the measured to ascomata.
The spores have numerous septa (I counted to 11). They have one rounded apex and the other pointed. They are straight or slightly curved.
The paraphyses are multiseptadas, x 2.3-3um wide, and with the apex slightly swollen (to 4um).
Asci and paraphyses present a species of gel that keeps together by the apex.

I do not have a key to the genera of Rhytismataceae, but looking at the literature that I have, I think it could be Naemacyclus. At first I thought of N. caulium but both the spore size as the asci is significantly higher. I've seen that those sizes would fit better with N. lamberti, but I haven't a clear description of the species.


Can anyone help?


a greeting
Susana

  • message #34724
  • message #34724
  • message #34724
  • message #34724
Hans-Otto Baral, 26-03-2015 08:43
Hans-Otto Baral
Re : Rythismataceae
I am quite sure this is Karstenia idaei. The genus belongs in Ostropales.

The asci are not inamyloid: I see a faint red reaction on the ascus wall. If you view when the Lugol comes in contact with the hymenium then you should see a faint blue front before all turns red.

More instructiv is to pretreat with KOH. Afterwards you will get a blue hymenium.

Equisetum seems a very exceptional substate for the species, but it is actually plurivorous, including ligneous hosts.

Zotto
Garcia Susana, 26-03-2015 22:32
Re : Rythismataceae
Hola Zotto,

Es cierto, se trata de un Ostropal.
Pero, el tamaño esporal encaja con Karstenia idaei? La descripción que yo tengo dice que las esporas son de 40-60 x 3-4um. Las que yo he medido no llegan a 3um de ancho.

Gracias, un saludo
Susana
  • message #34756
Hans-Otto Baral, 26-03-2015 22:46
Hans-Otto Baral
Re : Rythismataceae
You are right. I have measurements from *41-64 x 3-3.2(-3.6) µm to *59-73 x 4-4.5 µm. But your spores did not look to mee so narrow. Another possibility would be K. macer.

These Karstenia species are not at all easy, and I feel there are more species hidden behind my images. My drawing Karstenia macer, HB 6113.JPG looks microscopically like yours. The apothecia have black lobes but your fungus is also somewhat dark, isn't it?

So maybe K. macer would be a better choice.

Zotto
Garcia Susana, 26-03-2015 23:46
Re : Rythismataceae
Hola,

Con Karstenia macer encaja perfectamente.
Si, mis ascomas también tienen el margen ennegrecido.

Gracias de nuevo.

Susana