Phyllobrostis eremitella is a moth in the family Lyonetiidae. It is found in Portugal, France (Alpes-Maritimes, Bouches-du-Rhone, Pyrenees-Orientales, Var) and Italy. The wingspan is 9-9.5 mm. The larvae feed on Daphne gnidium. They live in long twig-galls. Several larvae have been found in a single gall. Pupation occurs in the lumen of the gall.