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Telogalla olivieri (Vouaux) Nik. Hoffm. & Haffelner

Description

Unlichenized lichenicolous fungus.

 

     Parasitic fungus forming wrinkled, tortuous galls concolorous to the host's thallus, sometimes with tiny blackish spots. Parasite of Xanthoria and in particular of Xanthoria parietina s.l and of Xanthoria calcicola, more rarely of Xanthoria aureola.

 

Anamorph: pycnidia submerged in areas with galls, visible only as small black dots 75-100 µm in diameter. Cylindrical conidia of 3.5-5 x 1.5-2 µm. (This anamorph can come mixed with the teleomorph).

 

Teleomorph: subglobular perithecia of 150-250 µm, submerged in the thallus, colorless but sometimes blackish towards the ostiole. No paraphyses but filamentous periphyses 2-2.5 µm wide. Asci 8 spores, with a small apical "beak", 45-65 x 12-20 µm. Colorless, elliptical, non-septate spores but sometimes with 2 guttules, 15-20 x 4-7 µm according to the literature, 15-20 (22) x (4) 5-7 µm according to our own measurements.

 

N.B. The anamorph seems very common but needs to be systematically searched for, the teleomorph is less rare and more visible, even if this parasite causes little damage to its host.

 

 

 

 

Telogalla olivieri sur Xanthoria aureola Crozon 1
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria aureola Crozon 2
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria calcicola Le Fret 1
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria calcicola Pointe de Pen-Hir 1
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria parietina Belgique Cerfontaine 1
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Belgique Cerfontaine 2
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Belgique Cerfontaine 3
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Belgique Cerfontaine 4
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Belgique Cerfontaine 5
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Coupe KOH Belgique Cerfontaine 6
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Coupe KOH Belgique Cerfontaine 7
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Coupe KOH Belgique Cerfontaine 8
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina General KOH Belgique Cerfontaine 9
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Asque Bleu Coton Belgique Cerfontaine 10
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Spores KOH Belgique Cerfontaine 11
Jacques HAINE

Telogalla olivieri sur Xanthoria parietina Spores Bleu Coton Belgique Cerfontaine 12
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria calcicola Argol 1
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria calcicola Argol 2
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria parietina Lesteven 1
Bernard BOUFFINIER

Telogalla olivieri sur Xanthoria parietina Lesteven 2
Bernard BOUFFINIER