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The adult is unicolourus or one-colored. It is a dark brown that appears to be almost black. It is covered with fine hairs which may be brown, black, white or gold in color. These hairs form a pale pattern on the elytra. It can be distinguished from other Trogoderma species by the paler patterns on its elytra. It is oval and has clubbed antennae. It is 2 - 4.2 mm long. It is short-lived. The adult can fly. The adult feeds on nectar and pollen from flowers.
The glabrous cabinet beetle is found in North America, Europe and North and Central Asia. The larva feeds on stored wheat, shelled corn, barley, soybean meal, wheat bran and brome grass seed. It is found in granaries, flour mills, feed mills and dried milk factories. The glabrous cabinet beetle looks very similar to other Trogoderma species.