Eriophyes arianus (Canestrini, 1890)
on Sorbus

Sorbus aria, France, Rhône-Alpes, Haute-Savoie, Bionnassay, 1700 m © Arnold Grosscurt

Sorbus mougeotii, France, Rhône-Alpes, Haute-Savoie, Alpage du Charmant Som, 1640 m; © Arnold Grosscurt

same leaf, underside
hostplants
Rosaceae, monophagous
Sorbus aria, aucuparia, domestica, ? torminalis.
synonyms
Phytoptus pyri var. arianus.
note
Because of the shape of the leaf, Sorbus mougeotii belongs to the subgenus aria. Therefore the galls on S. mougeotii have been identified as E. arianus, which is known from S. aria. It should be added that that taxonomy of the gall mites that cause this type of galls on the genus Sorbus is not yet fully stabilised.
references
Béguinot (2002h), Coulianos & Holmåsen (1991a), Hellrigl (2003a), Lambinon Schneider & Feitz (2012a), Redfern & Shirley (2011a), Ripka (2007a), Roskam (2009a).