Tetramesa hyalipennis (Walker, 1832)

on Elymus, Elytrigia

Tetramesa hyalipennis galls

galls on Elytrigia juncea subsp. boreoatlantica (left) and E. repens (right); from Claridge (1961a)

Tetramesa hyalipennis: gall on Elytrigia repens

Elytrigia repens, Balkbrug, Oud Avereest, 16.vii.2020 © Arnold Grosscurt

Tetramesa hyalipennis: galls on Elytrigia repens

variability

Tetramesa hyalipennis: opened gall

opened gall

Tetramesa hyalipennis: larva

larva

Tetramesa hyalipennis: gall on Elytrigia repens

Elytrigia repens, France, dép. Pas-de-Calais, Oye-Plage, RN Platier d’Oye, 23.x.2015 © Sébastien Carbonelle; wasps reared, det. Gérard Delvare

gall

The top 3-4 internodes are very strongly shortened, their lateral walls are thickened, and the transverse walls in the nodes have disappeared. Th leaf sheaths form an elliptic mass, the leaf blades are practically lost. in the cavity of the internodes a single larva.

host plants

Poaceae, monophagous

Elymus caninus; Elytrigia intermedia, repens.

synonyms

Harmolita hyalipennis; Isosoma hyalipenne; Isosoma, Tetramesa, graminicola auct. nec Giraud, 1863.

Illustrating this gall, Houard (1908a) mentions as the host plant “Ammophila arundinacea“, currently Ammophila arenaria subsp. arundinacea. The only Tetramesa mentioned from Ammophila in the more recent literature is T. eximia; however, that species makes different galls.

references

Bailey (1967a), Buhr (1964a), Claridge (1961a), Dauphin & Aniotsbehere (1997a), Dawah (1987a), Henneicke, Dawah & Jervis (1992a), Houard (1908a), Lambinon, Schneider & Chevin (2003a), Lehmann & Hannover (2016a), Redfern & Shirley (2011a), Roskam (2009a, 2019a), Tomasi (2012a, 2014a).