What is a distinguishing feature of the confused flour beetle?

The distinguishing feature of the confused flour beetle is its antennae, which have a clubbed appearance. Specifically, these beetles possess a unique structure to their antennae, where the last few segments are noticeably enlarged and form a club shape. This morphological trait is key for identification and differentiates them from other beetles that may have similar body shapes or sizes.

Although the confused flour beetle does have a cylindrical body shape, it is primarily the structure of the antennae that sets it apart. The capability of flying is not a distinct characteristic of this species; while some beetle species can fly, not all individuals of the confused flour beetle have this ability. Thus, the clubbed antennae serve as the critical identifying feature of this pest species.