Abrothallus chrysanthus Stein

van den Boom, Pieter P. G., Clerc, Philippe & Ertz, Damien, 2015, New records of lichens and lichenicolous fungi from La Gomera (Canary Islands, Spain), including the new species: Usnea boomiana P. Clerc, Candollea 70 (2), pp. 165-177 : 173

Abrothallus chrysanthus Stein

Notes. – In Macaronesia, this lichenicolous fungus was previously only known from the Azores ( VAN DEN BOOM & ERTZ, 2014). It is closely related to A. usneae Rabenh. , but A. chrysanthus has ascospores of 8-10 × 3-4 µm and those of A. usneae are 14-18 × 5-7 µm.

Material examined. – 11, Ju, Boom 46078 ; 27, Ci, Boom 46423 [all on Usnea ] .