Pseudorchestes pratensis (Germar, 1821)

Pseudorchestes pratensis: mine on Centaurea jacea

Centaurea jacea, Belgium, prov. Namur, Viroinval, Nismes, Tienne Breumont, 14.vi.2018 © Stéphane Claerebout

Pseudorchestes pratensis: mine on Centaurea jacea

same leaf, underside

Pseudorchestes pratensis: larva

larva, dorsal

Pseudorchestes pratensis: young mines

Centaurea scabiosa, Belgium, prov. Namur, Nismes: younh mines © Chris Snyers

Pseudorchestes pratensis: mines

a few days later

Pseudorchestes pratensis: mines

lighted from behind

Pseudorchestes pratensis: occupied mine on Centaurea jacea

Centaurea jacea, Belgium, prov. Namur, Matagne-la-Grande, Camp du tir © Stéphane Claerebout: the initial part of the gallery is probably run over by the later blotch.

Pseudorchestes pratensis: mine on Centaurea jacea

Centaurea jacea, Belgium, prov. Namur, Couvin, lieu-dit “Roche Albéric” © Stéphane Claerebout

Pseudorchestes pratensis: mine on Centaurea jacea

Centaurea jacea, Belgium, prov. Namur, Nismes, Tienne Breumont Stéphane Claerebout; the arrows point to the oviposition scars

mine

Oviposition at the very leaf margin, not in the midrib, as in most other (Pseud-)Orchestes species. The larva makes a shallow upper surface blotch. Frass concentrated in the centre of the mine. The apodous larva, when full grown, pupates in a globular cocoon in the centre.

hostplants

Asteraceae, monophagous

Centaurea jacea, scabiosa.

phenology

Larvae in July (Hering, 1957a), May-June and July-August (Scherf, 1964a).

BENELUX

BE recorded (Curculionidae.be).

NE recorded (Heijerman, 1993a).

LUX not recorded (Fauna Europaea, 2007).

distribution within Europe

From Ireland to the Ukraine and from Germany to Italy and Greece (Fauna Europaea, 2007).

pupa

see Scherf (1964a).

synonyms

Orchestes, Rhynchaenus pratensis

notes

Heeger (1858a) gives many details about the biology; see also Scherf (1964a). Can survive situations with an extremely heavy grazing pressure (Morris, 1993a).

references

Buhr (1933a), Caillol (1954a), Heeger (1858a), Heijerman (1993a), Hering (1923a, 1930a, 1957a), Kleine (1924/25a), le Monnier (2003a), Morris (1993a), Rheinheimer & Hassler (2010a), Robbins (1991a), Scherf (1964a), Vorst (2010a).

mod 21.viii.2018