Plagiotrochus amenti Kieffer, 1901
on Quercus, agamnous generation
Larvae solitary in 1 x 3 mm large elliptic cells in 2-3 years old branches; only during mass occurrences some swelling does occur, and the galls can be found only by looking for exit holes. Pupation within the gall; the galls may be vacated in the second or third year.
on Quercus, sexual generation
Quercus suber, catkin gall (from Houard, 1908a)
gall chamber of 0.7 x 2 mm under the bark of one year old twigs or in the swollen axis of catkins, rarely in a petiole or thick vein. Infested parts of the plants are slightly swollen or contorted. The adult wasps emerge early in the summer.
Plagiotrochus suberi Weld, 1926.
the species is a threat for the cork production.
Cerasa (2015a), Cerasa, lo Verde & Massa (2014a), Dauphin & Aniotsbehere (1997a), Garbin, Díaz & Pujade-Villar (2008a), Houard (1908a), Kwast (2014a), Nieves-Aldrey (2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pujade-Villar, Garbin, Paretas-Martínez & Díaz (2008a), Pujade-Villar, Grami & Ben Jamâa (2010a), Pujade, Villemant & Andreï-Ruiz (2000a).