Plant Parasites of Europe

leafminers, galls and fungi

Tetramesa linearis

Tetramesa linearis (Walker, 1832)

on Elytrigia

Tetramesa linearis: galls on unidentified grass

unidentified grass; Denmark © Simon Haarder

Tetramesa linearis: female wasp

female wasp

Tetramesa linearis: male wasp

male wasp


Inside wall of the culm with one or more galls in shape and size similar to a grain of rice, each with a pupa or a white larva. Above the galled region the plant is stunted. The larva hibernates in the gall and pupates in the spring.

host plants

Poaceae, monophagous

Elytrigia intermedia & trichophora, juncea & boreoatlantica, pungens, repens.


Isosoma, Tetramesa agropyri von Schlechtendal, 1891.


Claridge (1961a), Dauphin & Aniotsbehere (1997a), Dawah (1987a), Henneicke, Dawah & Jervis (1992a), Houard (1908a), Koponen & Vikberg (2016a), Popescu (2001a, 2006a, 2009b), Redfern & Shirley (2011a), Roskam (2009a, 2019a).

Last modified 20.iii.2021