Mayetiola festucae Ertel, 1975
the yellowish-white larva, about 3 mm long, lives within a leaf sheath, just above the ground. At the outsie a dense mass of white tangled accessory roots, comparable with the gall of M. radicifica. Pupation internal.
the larva is described by Ertel.
Ertel (1975a), Gagné & Jaschhof (2014a), Haarder, Bruun, Harris & Skuhravá (2016a), Roskam & Carbonnelle (2015a).