Claim: Canthophorus dubius is a species of burrowing bugs belonging to the family Cydnidae, subfamily Sehirinae, 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).
Evidence: Canthophorus dubius is a species of burrowing bugs or negro bugs belonging to the family Cydnidae, subfamily Sehirinae. The body of these shieldbugs is oval, black or dark blue, sometimes metallic green or bright violet. Canthophorus dubius can reach a length of 6–8 millimetres (0.24–0.31 in) and a width of 3.5–4.5 millimetres (0.14–0.18 in).