Par Lechat C., Fournier J., Priou J.P.
Vol. 10 (4) – 09 septembre 2018
Seulement pour les abonnés
Résumé (anglais) : Chrysonectria finisterrensis gen. and sp. nov. is described and illustrated, based on a collection from France on bark of Quercus robur. The acremonium-like asexual morph of this species was obtained in culture and sequenced. The genus is placed in the Nectriaceae based on ascomata changing colour in 3% KOH or lactic acid as defined by Rossman et al. (1999), acremonium-like asexual morph and phylogenetic analysis of its LSU sequence. Morphologically, Chrysonectria is primarily characterized by gregarious, corticolous, globose to subglobose, pale orange, non-stromatic ascomata with ascomatal surface covered by bright yellow hyphal elements arising from the subiculum, releasing orange yellow pigments in 3% KOH or yellow pigments in lactic acid
In the continuation of our survey of hypocrealean fungi in Europe, a collection on bark of Quercus robur was intriguing because of the golden yellow colour of its unusual type of vestiture. It was assigned to the Nectriaceae Tul. & C. Tul. based on its pale orange ascomata changing colour in 3% KOH or lactic acid, which was confirmed by our phylogenetic analysis […]