Pseudorchestes pratensis (Germar, 1821)
Centaurea jacea, Belgium, prov. Namur, Viroinval, Nismes, Tienne Breumont, 14.vi.2018 © Stéphane Claerebout
same leaf, underside
Centaurea scabiosa, Belgium, prov. Namur, Nismes: younh mines © Chris Snyers
a few days later
lighted from behind
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.
Centaurea jacea, Belgium, prov. Namur, Couvin, lieu-dit “Roche Albéric” © Stéphane Claerebout
Centaurea jacea, Belgium, prov. Namur, Nismes, Tienne Breumont Stéphane Claerebout; the arrows point to the oviposition scars
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.
Centaurea jacea, scabiosa.
Larvae in July (Hering, 1957a), May-June and July-August (Scherf, 1964a).
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).
see Scherf (1964a).
Orchestes, Rhynchaenus pratensis
Heeger (1858a) gives many details about the biology; see also Scherf (1964a). Can survive situations with an extremely heavy grazing pressure (Morris, 1993a).
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).