They are among the primitive weevils, because of their straight antennae, which are inserted near the base of the rostrum. The prothorax is much narrower than the base of the elytra on the abdomen.
They belong to the earliest type of weevils, due to their straight antennae, which are inserted close to the base of the snout. The thorax is much narrower than the base of the wing covers on the abdomen.