Accès membres

Mot de passe perdu? S'inscrire

27-04-2026 12:54

Spiral conidial crust
Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Microdiplodia henningsii
Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

Ramularia sp ?
William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

lachnum pudicellum
Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

24-04-2026 03:16

Trinacrium robustum?
David Chapados David Chapados

Found while looking at something else from wood in

22-04-2026 01:06

Neonectria ou thelonectria ?
Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

22-04-2026 20:17

Pseudaegerita spec.
Marian Jagers Marian Jagers

Is anyone familiar with the Hyphomycetes genus Pse

23-04-2026 06:46

Fungus sp
François Freléchoux François Freléchoux

Bonjour, Voici la description d'un minuscule asco

21-04-2026 22:14

Peziza -> Phylloscypha labessiana
Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

« < 1 2 3 4 5 > »
Helicosporium?
Marc Detollenaere, 27-02-2020 18:11
Marc Detollenaere

Dear Forum,


On rotten wood of Salix sp. in a moist place I found a helicosporous hyphomycete with branched well-developed conidiophores,  brown and septate.The hyaline hollow conidia were coiled in two dimensions and measured 15-18µm.


Using the work of Zhao(2007), the keys brought me to the genus Helicosporium.


Could someone confirm this and eventually give me the right taxon?


Marc

  • message #61791
  • message #61791
  • message #61791
  • message #61791
  • message #61791
Josep Torres, 28-02-2020 14:28
Josep Torres
Re : Helicosporium?
Veo la colonia de color gris rosado, quizás ¿Helicosporium griseum?.
Saludos cordiales

Chris Yeates, 28-02-2020 14:47
Chris Yeates
Re : Helicosporium?
This paper may help -

Amitiés

Chris
Marc Detollenaere, 28-02-2020 19:14
Marc Detollenaere
Re : Helicosporium?

Dear Josep and Chris,


 


Thank you for your comments and the magnificent article of Goos.


 I combined the keys and descriptions of Goos and Zhao. The branched and anastomosing conidiophores, the large denticles (3.5-4.1µ), the large conidial filaments (2.5-2.9µ) and the larger conidia (18-23µ) brought me to Helicosporium lumbricopsis.


Could you agree?


 


Marc

  • message #61807
  • message #61807
  • message #61807
Chris Yeates, 28-02-2020 19:32
Chris Yeates
Re : Helicosporium?
I don't know the genus well to comment usefully. The protologue : https://www.biodiversitylibrary.org/page/15997229#page/289/mode/1up seems to suggest it is tropical or subtropical, but we all know our knowledge of the distribution of many fungi is far from settled.
Josep Torres, 28-02-2020 21:29
Josep Torres
Re : Helicosporium?
Hola Marc, para el Helicosporium lumbricopsis (color gris) se citan unas medidas de los conidios de 21-28 µ, no así para el Helicosporium griseum (color gris rosado), según las claves de 18-25µ, el resto de valores de ambos es muy parecido.
Sigo pensando en el Helicosporium griseum = Helicosporium lumbricoides

Saludos cordiales.

Josep

Marc Detollenaere, 29-02-2020 09:30
Marc Detollenaere
Re : Helicosporium?

Using Goos and Zhao we have to choose between H griseum and H lumbricopsis.H griseum is a commonly found species, reported worldwide. In general it has smaller conidia and smaller filaments compared to H lumbricopsis, which is known as a tropical and subtropical species.


Following Linder(1929) and Moore(1955) the differences between the two species were more environmental than morfological.


H griseum with larger than normal dimensions does not seem unlikely.


Marc

Alain GARDIENNET, 29-02-2020 14:07
Alain GARDIENNET
Re : Helicosporium?

Bonjour Marc,


J'ai déjà été confronté à ce type de récolte. Les études citées sont de bonnes études, sérieuses, mais ne peuvent être suffisantes. En particulier je pense que la connaissance de ces champignons en Europe est insuffisante, et que par conséquent il peut être hasardeux de se baser sur une comparaison seulement morphologique avec les espèces citées par ces études originaires d'Asie pour donner absolument un nom. Avec des données moléculaires, ce serait déjà moins aléatoire.


Alain