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14-08-2008 23:39

Miguel Ãngel Ribes Miguel Ángel Ribes

Sobre madera en bosque de laurisilva (Tenerife, Is

08-08-2008 04:07

NC NC

Bonjour à tous, Quelqu'un peut-il me fournir une

05-08-2008 16:06

Alain GARDIENNET Alain GARDIENNET

Bonjour, Une récolte qui devrait intéresser Chr

05-08-2008 07:54

VASILEIOS KAOUNAS

Found by giorgos konstantinidis 1-8-2008, [Ziakas]

31-07-2008 02:30

Raúl Tena Lahoz Raúl Tena Lahoz

Melastiza boudieri? Spores: 15-18 x 9´5-10´5 I

28-07-2008 22:30

Enrique Rubio Enrique Rubio

Quelqu'un pourrait-il obtenir la documentation sui

28-07-2008 22:15

Enrique Rubio Enrique Rubio

Cher amis: J'aimarais conaitre votre opinion sur

27-07-2008 16:17

Jean-Louis CHEYPE Jean-Louis CHEYPE

Bonjour à tous Je sèche sur une minuscule (diam

27-07-2008 15:07

Michel Delpont Michel Delpont

Bonjour, Je vous soumets ce Scutellinia, trouv

25-07-2008 22:39

Nicolas VAN VOOREN Nicolas VAN VOOREN

Dans le cadre de la préparation d'un numéro spé

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Stictis sp
Miguel Ángel Ribes, 14-08-2008 23:39
Miguel Ãngel RibesSobre madera en bosque de laurisilva (Tenerife, Islas Canarias). Ascas octospóricas, aparentemente no amiloides. Esporas filiformes, muy largas, multiseptadas, formando un trenzado entre ellas cuando están dentro del asca. Paráfisis muy largas, delgadas, filiformes, con la punta bifurcada y flexuosa, que en agua se confunden fácilmente con las esporas, pero más delgadas que las esporas. En la base de las ascas y las paráfisis en masa hay una sustancia ligeramente amiloide, que a veces también aparece en las puntas, y hace que algunas ascas parezca amiloides. Las medidas de las esporas son ligeramente mayores que las de las propias ascas, supongo que debido a que están trenzadas dentro del asca y ocupan menos de largo.

On wood at laurisilva forest (Tenerife, Canary Island). Asci 8 spores, seemingly not amiloides. Filiform and very long spores, multiseptated, coiled when they are inside the asci. Very long, thin, filiform paraphysis, with forked and flexuous top, in water get confused easily with the spores, but thinner than the spores. At the base of the ascas and the paraphysis there there is a substance lightly amiloide, that sometimes also appears in the tops, and does that some ascas seems amiloid. The measures of the spores are lightly major that the ascai, I suppose that due to the fact that they are coiled inside the asci and have a shorter length.

Sporal measures (400x, water and y congo red, fresh material)
207.3 [288.7 ; 334.2] 415.5 x 1.1 [2.2 ; 2.9] 4
Q = 63.6 [114.3 ; 143.6] 194.3 ; N = 21 ; C = 95%
Me = 311.43 x 2.57 ; Qe = 128.95

Asci measures (400x, water and y congo red, fresh material)
248.5 [291.8 ; 327] 370.4 x 4.3 [7.1 ; 9.3] 12
N = 12 ; C = 95%; Me = 309.44 x 8.17
  • message #5273
Miguel Ángel Ribes, 14-08-2008 23:53
Miguel Ãngel Ribes
Re:Stictis sp
Ascas y paráfisis con sustancia amiloide en la base.

Asci and paraphysis with amiloid substance at the base
  • message #5274
Miguel Ángel Ribes, 15-08-2008 00:07
Miguel Ãngel Ribes
Re:Stictis sp
Ascas con esporas trenzadas en el interior

Asci with coiled spores inside
  • message #5275
Miguel Ángel Ribes, 15-08-2008 00:08
Miguel Ãngel Ribes
Re:Stictis sp
Esporas filiformes

Filiform spores
  • message #5276
Miguel Ángel Ribes, 15-08-2008 00:09
Miguel Ãngel Ribes
Re:Stictis sp
Ascas con esporas trenzadas en el interior

Asci with coiled spores inside
  • message #5277
Miguel Ángel Ribes, 15-08-2008 00:11
Miguel Ãngel Ribes
Re:Stictis sp
Paráfisis con sustancia amiloide en la punta

Paraphysis with amiloid substance at the top
  • message #5278
Miguel Ángel Ribes, 15-08-2008 00:24
Miguel Ãngel Ribes
Re:Stictis sp
Siguiendo las claves de Martha A. Sherwood, en Mycotaxon 5(1): 1-277, "The Ostropalean fungi", llego a varias especies que no concuerdan:
* S. sarothamni: con ascas y esporas más pequeñas y sobre Sarothamnus.
* S. carpenteriana: con borde lacerado, ascas y esporas más pequeñas.
* S. viticola: con poro ancho, orbicular, margen muy delgado gris pruinoso, paráfisis no bifurcadas, ascas y esporas más grandes.
* S. bicolor: margen gris oscuro, paráfisis no ramificadas.
* S. oculiformis: margen oscuro, ascas y esporas más pequeñas.
* S. korfii: margen gris pálido, paráfisis no ramificadas, ascas y esporas más pequeñas.

Sin embargo, mirando las descripciones una por una, con la que más coincide es con S. prominens: margen prominente, blanco, entero y pruinoso, paráfisis filiformes, ramificadas y circinadas apicalmente??, I+ ó I-, dependiendo de la edad, ascas de 220-300 x 6(-8), esporas de 220-300 x 2-2,25, septadas.

Muchas gracias por vuestra ayuda

According to Martha A. Sherwood's keys, in Mycotaxon 5 (1): 1-277, " The Ostropalean fungi ", I arrive to several species, but no one is completley Ok:
* S. sarothamni: with smaller asci and spores and growing on Sarothamnus.
* S. carpenteriana: with spoilt edge, smaller asci and spores.
* S. viticola:: with broad pore, orbicular, margin very thin and gray pruinose, paraphysis not bifurcated, bigger asci and spores.
* S.bicolor: dark gray margin, paraphysis not branched.
* S. oculiformis: dark margin, smaller asci and spores.
* S. korfii: pale gray margin, paraphysis not branched, smaller asci and spores.

Nevertheless, looking at the descriptions one by one, it fits better with S. prominens: prominent margin, white, entire and pruinose, paraphysis filiform, branched and circinal at the apex??, I + ó I-, depending on the age, asci 220-300 x 6 (-8), spores 220-300 x 2-2,25, septated.

Thank you very much
  • message #5279
Hans-Otto Baral, 15-08-2008 00:30
Hans-Otto Baral
Re:Stictis sp
Dear Miguel

identifying Stictis is very difficult. Despite the work of Sherwood I am quite unable to name most of my collections of Ostropales. I think it is necessary to make vital taxonomy in this group as in any other. The spores are not only filiform but the size of the individual cells is important and also the guttulation of the living spore cells (multigutulate or almost egutulate depending on the species).

The spores are usually straight inside the living asci but get coiled due to ascus shrinkage.

Besides it is important to use Lugol, a fact that Sherwood was unaware of. I attach here an example how Melzer gives no reaction but when pretreated with KOH gives intensely blue. Sherwood did not know that. Your Stictis will probably not react such intense after KOH, but I suppose it will. In IKI without KOH one gets a distinctly red reaction.

Zotto
  • message #5280
Miguel Ángel Ribes, 15-08-2008 01:01
Miguel Ãngel Ribes
Re:Stictis sp
Hi Zotto, your answer have been really quick.

The first bibliography I checked with this fungi was your DVD and I saw you have no name in several Stictis. If you are unable to name someones, so I considered myself a completly useless to give it an aproximately name.

Next time than I collect a Stictis I will try to do my job better than now. It is really dificult this small fungi.

Thank you.
Hans-Otto Baral, 15-08-2008 15:15
Hans-Otto Baral
Re:Stictis sp
yes, Stictis is difficult and I hate the genus. But I learnd that they are interesting, and that they really have characters. But the methods may strongly influence the result and make comparison incompatible. For example, I know a species of ?Odontotrema from the semideserts which seems to have almost straight spores about 25 x 3 µm. If you put the mount in KOH, the spores become strongly helicoid! First I thought I have two different species, because I could not imagine such severe influence of KOH.

Good luck!
Zotto
Miguel Ángel Ribes, 16-08-2008 12:42
Miguel Ãngel Ribes
Re:Stictis sp
Really amazing. At hollidays I am going to read slowly your vital taxonomy, I have only take a glance now. But in my document titled "Vital vs. herbarium taxonomy, 1992, Mycotaxon.DOC" I can not see the photos. The PowerPoint presentation titled "Vital vs. herbarium taxonomy, 2005.ppt" is Ok.

Thaks again.
Hans-Otto Baral, 24-08-2008 23:06
Hans-Otto Baral
Re:Stictis sp
There are no photos in that doc file, actually. Or perhaps only some of them. I have a file in which about half of the images are missing. Otherwise I would send it, sorry.

Zotto
Miguel Ángel Ribes, 25-08-2008 10:57
Miguel Ãngel Ribes
Re:Stictis sp
Thanks Zotto, don't worry.