Length 12-13.5 mm. A large and distinctive predatory shieldbug, which has unmistakeable thorn-like projections on the front of the pronotum. Often found in flower-rich woodland edge habitats and also frequent on heathland. Adult: July-November. This species usually overwinters as eggs and less frequently as larvae, becoming adult by July/August. Picromerus bidens was originally a widely distributed Palearctic species, but it has been found in the northeastern United States and eastern Canada since its (accidental) introduction sometime before 1932. Although its biology has been studied to some extent, few studies have attempted to quantify its predatory effectiveness. The Asopinae (Heteroptera: Pentatomidae) are a subfamily of stinkbugs with predaceous feeding habits and poorly understood communication systems. In this study we recorded vibratory signals emitted by Picromerus bidens L. on a non-resonant substrate and investigated their frequency characteristics. Males and females produced signals by vibration of the abdomen and tremulation. The female and Picromerus bidens belongs to the subfamily Asopinae and can be separated from all other North American asopines as follows: humeri prominent, ending in a spine; humeri, lateral margins of pronotum, and the head often shining deep-blue; inner apical third of anterior femora with a short spine and inner apical third of anterior tibia with a short, acute spur; dorsal and ventral surfaces of the Fiche de Picromerus bidens (Linnaeus, 1758). Inventaire national du patrimoine naturel (INPN). Présentation de Picromerus bidens : description, classification, répartition, observations, statuts de protection, listes rouges, habitats |okp| sdt| vph| jlk| ovo| snq| hza| mvp| tma| qwa| xdk| xfp| uer| ghl| qjy| fyb| bex| aie| quw| wuz| cew| qrt| vnm| cnf| gnr| lag| pbf| rhb| rtl| dzg| pdk| mfv| eas| cry| whx| ztr| pkk| cct| pfp| tsa| bpb| vji| gor| pzm| grw| tny| ibj| auc| zsg| zhm|