The Canthophorus dubius shieldbug, which has an oval, black or dark blue, sometimes metallic green or bright violet appearance, and can reach a length of 6–8 millimeters (0.24–0.31 inch) and a width of 3.5–4.5 millimeters (0.14–0.18 inch), inhabits grasslands and open dry-warm areas, in particular lime or sand-marshes.
The Canthophorus dubius shieldbug, which has an oval, black or dark blue, sometimes metallic green or bright violet appearance, and can reach a length of 6–8 millimeters (0.24–0.31 inch) and a width of 3.5–4.5 millimeters (0.14–0.18 inch), inhabits grasslands and open dry-warm areas, in particular lime or sand-marshes.