What feature is used to identify the sawtooth grain beetle?

The distinguishing feature used to identify the sawtooth grain beetle is the fine teeth that are present on either side of the thorax. These serrated projections give the beetle its characteristic appearance, which sets it apart from other similar beetles. The fine teeth can be seen clearly when observing the beetle, making them an important identification marker for pest control professionals.

While color, size, and wing shape may vary among different beetles and can help in identification, they are not as definitive for the sawtooth grain beetle as the fine teeth feature. This specific characteristic is a key reason why pest control practitioners focus on examining the thorax when identifying this particular beetle species.