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These 0.2-0,4 mm diam. flat to slightly convex, gr

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50239 - Hymensocyphus sp. ?
Roland Labbé, 07-04-2010 02:47
Bonjour à vous tous !

Voici un disco qui nous est inconnu, peut être un Hymenoscyphus ?
Merci de bien vouloir nous aider.

Amitiés !
Roland

Détails :

Date de récolte : 22 / 08 / 2009
Habitat : forêt mixte
Substrat : débris ligneux d'érable très décomposé
Sporée non disponible
Marge d'aspect enroulé
Pied large, un peu plus étroit à la base

Spores cylindriques-fusoïdes, lisses, à 1 septum médian, rarement à 2-3 septa, guttulées, hyalines en NaCl iso., bourgeonnant assez souvent aux extrémités et / ou sur les côtés, 10-17 x 3,5-4,5 µm, 14,2 x 3,5 µm en moyenne (10 spores), Q = 3,46
Asques à 8 spores unisériées, avec appareil apical faiblement amyloïde et crochet à la base, 88-105 x 7-8 µm
Paraphyses cylindriques, rarement ramifiées à la base, parfois un peu élargies ou recourbées à l'apex, septées, à contenu huileux à 70-100%, de longueur très inégale, dépassant ou non les asques de 5-15 µm, mesurant 70-105 x 1,5-2,5 µm
Poils marginaux intérieurs cylindriques, en palissade, 2-3 µm de diam.
Partie recourbée de la marge formée de cellules globuleuses, ellipsoïdes, cylindriques, parfois en chaîne, avec terminaison clavée à fusoïde obtuse, où les spores semblent s'agglutiner en abondance
Poils de l'excipulum dispersés, cylindriques, un peu élargis à base
Excipulum ectal en textura globulosa à globulosa-angularis
Excipulum ental en textura prismatica
  • message #11011
Roland Labbé, 07-04-2010 15:25
Re:50239 - Hymensocyphus sp. ?
Voici une autre photo nature de la même espèce.

Roland
  • message #11012
MORA JOSE, 07-04-2010 15:48
Re:50239 - Hymensocyphus sp. ?
¿Il peut être Hymenoscyphus.calyculus (Sowerby) W. Phillips?
Hans-Otto Baral, 07-04-2010 16:37
Hans-Otto Baral
Re:50239 - Hymensocyphus sp. ?
I also considered calyculus, but the short stalk and the partly homopolar spores, also the globose cells on the lower flanks indicate for H. epiphyllus or H. monticola. In the dead state I feel unable to distinguish the two, although the bright yellow colour would be more typical for H. monticola (= Phaeohelotium monticola).

Zotto
Roland Labbé, 07-04-2010 17:02
Re:50239 - Hymensocyphus sp. ?
Zotto, according to you, what is the good genus now, Hymenoscyphus or Phaeohelotium for monticola ?

Roland
Hans-Otto Baral, 07-04-2010 18:32
Hans-Otto Baral
Re:50239 - Hymensocyphus sp. ?
I have no clear opinion. Genetics tell for two groups, but not enough species are sequenced so far. And position of Cudoniella is still not clear. Genus concepts are tro some degree a matter of taste. I tend to a less splitting which results in some cases in rather big genera.

So you can use both, as you wish.

Zotto
Bernard Declercq, 07-04-2010 20:46
Bernard Declercq
Re:50239 - Hymensocyphus sp. ?
Could this be "Hymenoscyphus" lutescens? I never have seen such species before. Anyhow, this is species belongs to my Phaeohelotium concept, so that, as already said, H. calyculus should be excluded.

Bernard
Hans-Otto Baral, 07-04-2010 21:24
Hans-Otto Baral
Re:50239 - Hymensocyphus sp. ?
Hi Bernard

H. lutescens is actually close to H. epiphyllus, but it is a species confined to rather unrotten conifer debris, especially cones. I have here a photo of the paraphyses with strongly refractive multiguttulate contents (VBs), which are also typical of H. epiphyllus, but never seen in H. monticola. So it would depend on seeing living paraphyses of Roland's collection (to be re-collected).

Zotto
  • message #11018
Roland Labbé, 08-04-2010 01:24
Re:50239 - Hymensocyphus sp. ?
Zotto, since P. monticola is a rather recent species, do you have a key
or a document to study it more ?
I would like to compare the data of our species with those close.

Roland
Roland Labbé, 08-04-2010 01:24
Re:50239 - Hymensocyphus sp. ?
Zotto, since P. monticola is a rather recent species, do you have a key
or a document to study it more ?
I would like to compare the data of our species with those close.

Roland
Roland Labbé, 08-04-2010 01:24
Re:50239 - Hymensocyphus sp. ?
Zotto, since I think P. monticola is a rather recent species, do you have a key
or a document to study it more ?
I would like to compare the data of our species with its relatives.

Roland
Hans-Otto Baral, 08-04-2010 20:07
Hans-Otto Baral
Re:50239 - Hymensocyphus sp. ?
You don't have the DVD? You will find images there, I am sure. The species is not recent, it was described by Kanouse around 1940, and is the type of Phaeohelotium.

Zotto