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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

10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

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

05-09-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour, hi everyone,Do you know where the fungari

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Clam on a stalk
David Malloch, 04-06-2011 13:40
David MallochHello,

This small discomycete occurs on overwintered leaves of Alnus viridis on my property.  It is never abundant, but I found it in May, 2009 and again this year.  The apothecia look like little brown clams on top of a stalk.  When it is moist the "clam" opens to expose the white hymenium, similar to what species of Lophodermium do, and when it is dry they close again.

Some asci appear to detatch from their croziers and float free but I am not sure if that always happens.  I have been unable to identify it.  It has some similarities to members of the Caliciales, but the habitat and ascus apex seem wrong for that group.  Do any of you recognize this fungus?

Dave
  • message #15439
David Malloch, 04-06-2011 13:42
David Malloch
Re : Clam on a stalk
Here are the asci.
  • message #15440
Stip Helleman, 04-06-2011 13:56
Stip Helleman
Re : Clam on a stalk
Hi Dave,
this is Mytilodiscus alnicola, see Schmidt & Schmidt Ascomyceten im Bild 1 nr. 25

cheers
Stip
  • message #15441
Gernot Friebes, 04-06-2011 13:59
Re : Clam on a stalk
Hi Dave,

looks like Mytilodiscus alnicola to me: http://www.mycokey.com/MycoKeySolidState/species/Mytilodiscus_alnicola.html

Best wishes,

Gernot
Stip Helleman, 04-06-2011 14:00
Stip Helleman
Re : Clam on a stalk
micro data
  • message #15443
David Malloch, 04-06-2011 14:13
David Malloch
Re : Clam on a stalk
Thanks Stip and Gernot. That's a perfect fit.  Judging from the name I should have called it "Mussel-on-a-stipe" instead of "Clam-on-a-stipe".

Dave