Accès membres

Mot de passe perdu? S'inscrire

22-05-2020 12:15

Joop van der Lee Joop van der Lee

Pseudothecia are deeply emmersed with only the nec

21-05-2020 18:37

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branche morte aérienne de Viburnum

21-05-2020 17:22

Bernard CLESSE Bernard CLESSE

Trouvé récemment dans une petite clairière d'un

18-05-2020 20:32

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branches mortes de Lonicera nigra (4

21-05-2020 09:26

Castillo Joseba Castillo Joseba

Me envian muestra seca de esta especie, parece una

06-09-2017 19:13

Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningGrowing on Equisetum arvense, in Bygdi

17-05-2020 12:03

Paz conde ita

Hi There This is a Scutellinia cf subhirtella, lo

20-05-2020 10:57

Mirek Gryc

Hello all.I found two collections of this genre ye

20-05-2020 05:34

Joop van der Lee Joop van der Lee

Since my findings of two Trichodelitschia species

19-05-2020 11:33

Maria Plekkenpol Maria Plekkenpol

Hello, I just read the post from 18-05-2020 and I

« < 443 444 445 446 447 > »
Trichodelitschia bisporula - Pseudothecium and it's ostiolar neck
Joop van der Lee, 22-05-2020 12:15
Joop van der LeePseudothecia are deeply emmersed with only the neck and top of the pseudothecia visible, for a total view one has to carefully dig them out of the dung.
At fist the body is conical (190-259x146-190 um) with a stunted neck and a top covered with long dark brown upwards growing setae (photo-1 & 2). The upper part of the body is mostly covered with small, dark brown, buckled setae.
Eventhough we cannot see them because the body of the pseudothecia is emmersed, setae also occur on the body itself. (photo-3).
When the body becomes bulbous it measures (305-385x250-305 um) the mature neck transforms into a diabolo like structure forcing the setea to grow sideways (photo-4).
In 2D the top of the cone looks like an isosceles trapezium with the long basis on top measuring 88-102 um forming, the short basis measures (82-86 um), the bottom will have the opposite shape with the same measurements. Total length of the neck is 60-63 um (photo-5), the neck in between measures 20-23x82-86 um.
On the plateau uniseptated hyphae will arise (27-28.5x3.5-3.75 um) and short setae (30-40x2.5-3.5 um) will form a collar just below the top accompanied by remaining long setae. (photo-6)

When observing (photo-7) we are looking at a visual illusion because of the angle of view. The plateau is not spherical but flat surrounded by a ridge. (photo-8 & 9). The diameter for the plateau of photo-9 = 88.6 um.
Also bald pseudothecium have been seen with a few setae left on the body. (photo 10 & 11)


Note:
von Niessl already observed the collar of short setae in 1875 (D. moravica)


Joop

  • message #63341
  • message #63341
  • message #63341
  • message #63341
  • message #63341
  • message #63341
  • message #63341
  • message #63341
  • message #63341
  • message #63341
  • message #63341