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Melastiza or Aleuria??
Jac Gelderblom,
05-11-2020 11:16
Dear friends
in a heatherfield (Calluna) on soil I found orange discos (diameter 2-5 mm).
The spore-dimensions are 21-23x9,5-10 micron (with oranamentation) and 15-17x6,5-8 micron without ornamentation. Ascus ca 230x12 micron. Further info: see foto's.
Melastiza flavorubens and Aleuria congrex came into my mind but I am not at all sure.
I hope you can help me.
Friendly greetings
Jac Gelderblom
Foto 1: Ascomata
Foto 2: spores in water
Foto3: spores in cotton blue
foto 4 parafyses in Meltzer reagens
fotot 5: hairs excipulum
Gilbert MOYNE,
05-11-2020 11:51
Re : Melastiza or Aleuria??
Il devait y avoir des petites mousses sur le sol. La forme très spéciale des spores semblant ornées de petites épines me fait penser à Octospora bridei à spores mesurant normalement : 22-26 x 11,5-13 µm.
Gilbert
Hans-Otto Baral,
05-11-2020 11:52
Re : Melastiza or Aleuria??
I know Aleuria with biguttulate (living) spores abd Melastiza with multiguttulate spores, but I am not sure if this applies to all species of each genus.
Jac Gelderblom,
05-11-2020 13:20
Re : Melastiza or Aleuria??
Il y avait beaucoup de petites mousses sur le sol (je ne sais pas quelle espèce).
Les spores sont peut être pas parfaitement mures; il ný avait pas de spores libres dans la préparation. Seulemant après "toucher" j'ai vu quelques spores libres.
Quant à moi ca va assez bien avec Octospora bridei.
Amitiés
Jac
François Bartholomeeusen,
05-11-2020 16:12
Re : Melastiza or Aleuria??
Hi Jac,
Is Aleuria exigua not possible?
Greetings,
François
Is Aleuria exigua not possible?
Greetings,
François
Hans-Otto Baral,
05-11-2020 16:36
Re : Melastiza or Aleuria??
I consider these spores mature. O. bridei is a minute species and has no such terminal caps.
I do not know A. exigua, and I opnly know Aleuria with a complete or incomplete net, but none with such small dense warts.
Jac Gelderblom,
05-11-2020 17:18
Re : Melastiza or Aleuria??
Thanks everyone.
I also considered the possibility of A. exigua,
The terminal caps fits better in that species but what bothers me is the lack of any trace of af a reticulum
Greetings
Jac
Jac Gelderblom,
05-11-2020 19:06
Re : Melastiza or Aleuria??
Zooming in on the fourth spore seen from the rightbottom corner you can see there is a reticulum ont the spore.
So for me it is now defenitively Aleuria exigua
Everybody thanks for your input!!!
Greetings
Jac
Patrice TANCHAUD,
06-11-2020 19:56
Re : Melastiza or Aleuria??
Bonsoir Jac,
c'est le nom que je proposerais également, comme ici :
Bien amicalement.
Patrice
Patrice