Trachys quercicola Marseul, 1871

Trachys quercicola: mines on Stachys recta

Stachys recta, France, dépt. Ardèche, Soyons, lieu-dit “Tour penchée” © Stéphane Claerebout

Trachys quercicola: mine on Stachys recta

mine, upper side

Trachys quercicola: frass pattern

frass pattern

Trachys quercicola: larva in its mine

larva in is mine; ventral view

mine

Full depth, transparant blotch. Oviposition site covered by a shining black drop of hardened secretion. Frass in granules or thread fragments. Pupation in the mine, pupa not in a cocoon.

host plants

Lamiaceae, oligophagous

Salvia pratensis; Stachys annua, recta.

Stachys recta is the most mentioned host plant.

phenology

Larvae in June-July (Hering, 1957a).

distribution within Europe

France, Iberian Peninsula, Italy (Fauna Europaea, 2007).

larva

Schaefer (1949a).

notes

Also on Stachys mines Trachys problematicus, and Hering (1957a) suggests that the two might have a subspecific relationship. The distribution patterns certainly supports Hering’s idea, but the Fauna Europaea (2007) treats them as two independent species.

references

Bilý (2002a), Cobos (1986a), Hering (1957a), Schaefer (1949a), Théry (1942a).

mod 24.viii.2018