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10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

07-09-2025 08:19

Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

03-09-2025 21:59

Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

06-09-2025 21:40

David Chapados David Chapados

Hi, Does somebody know the genus that has those b

07-09-2025 11:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I have identified this fungus as Hymenoscyph

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Ionomidotis irregularis ?
Ethan Crenson, 26-09-2019 05:23
Hello all,

I was on a walk last Sunday in the Bronx, NYC where a friend of mine found a very interesting asco.  It has a black fertile surface.  The outer surface is scurfy and dark brown.  It is rather thin and papery, especially after drying. It was growing on deciduous wood.  Asci that I measured were 70-73 x 6.5-7.5µm.  Spores are hyaline, biguttulate, ellipsoid and 7-10.5 x 3-4µm.  Paraphyses are lanceolate, septate, they enlarge to about 4µm at the widest point.  Many of the heads of the paraphyses became detached.  I applied KOH and noticed that there was an exudate of dark red pigment.  It also appears to be bitunicate.  (Unfortunately I am having problems with my image capture equipment, so I don't have the best documentation of all of these features).  Is this Ionomidotis irregularis? 

Many thanks in advance for your help.

Ethan
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Hans-Otto Baral, 26-09-2019 09:19
Hans-Otto Baral
Re : Ionomidotis irregularis ?
Hi Ethan

this is undoubtedly I. irregularis. Did you try to find out which wood it is? I know it only from Fagus, but for China is also Betula indicated.

What is the diameter of the apos? The asci are not bitunicate, they only have an inamyloid apical wall thickening.

I would appreciate the collection data to be cited in my planned paper on this species and the similar Diplocarpa bloxamii.

Zotto
Ethan Crenson, 26-09-2019 15:29
Re : Ionomidotis irregularis ?
Thank you Zotto! The collection was on a large cut stump in the Hunter Island section of Pelham Bay Park in the Bronx. Although Betula exists in the park, there are very few and they certainly do not grow as large as the stump in question.  Fagus and Quercus are dominant in the park along with Liquidambar, Robinia and Liriodendron. 

The smaller cluster of apothecia are 1.5 cm wide x 1.5 cm high.  The larger spreads to 4cm at the widest point and is 1.5 cm tall.  It was collected by Leah Krauss on September 22, 2019 at approximately 40.872817, -73.790911

Please let me know if there is any other data I can provide about the collection for your paper.  I'm happy to help.

Ethan
Gernot Friebes, 26-09-2019 17:43
Re : Ionomidotis irregularis ?
Hi, Ethan & Zotto,

this species was found on Populus by A. Gallé a few years ago, the collection data can be seen in austria.mykodata.net.

T. Glaser also recently published an article on I. irregularis in Mycologia Bavarica 19.

Best wishes,
Gernot
Hans-Otto Baral, 26-09-2019 20:20
Hans-Otto Baral
Re : Ionomidotis irregularis ?
Thanks, this is a big size for an inoperculate!

Quercus and Fagus are easily distinguished with a handlens (ring-pored in Quercus).

Hi Gernot, thanks for the hint on the paper (I do not have access) and the sample on Populus. This was certainly  Populus already in the field?
Gernot Friebes, 26-09-2019 20:26
Re : Ionomidotis irregularis ?
Populus was certain according to Anna. I don't have Thomas' article digitally either but I am sure he would send it to you if you ask him.

Best wishes,
Gernot
Patrice TANCHAUD, 26-09-2019 22:20
Re : Ionomidotis irregularis ?
Please, how to separate I. fulvotingens ?
Many thanks.

Patrice
Hans-Otto Baral, 26-09-2019 23:16
Hans-Otto Baral
Re : Ionomidotis irregularis ?
That species has neither lanceolate paraphyses nor hairs, and the spores are much smaller.
Patrice TANCHAUD, 27-09-2019 00:40
Re : Ionomidotis irregularis ?
Merci Zotto.
Ethan Crenson, 02-10-2019 17:00
Re : Ionomidotis irregularis ?
Zotto,

I guess I should clarify, the 4cm is the length of the cluster after it dried quite irregularly.  See my photo with a ruler for scale.

Thank you again for your help.

Ethan
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Hans-Otto Baral, 02-10-2019 17:04
Hans-Otto Baral
Re : Ionomidotis irregularis ?
o.k, thanks.
Hans-Otto Baral, 02-10-2019 17:04
Hans-Otto Baral
Re : Ionomidotis irregularis ?
o.k, thanks.