Members of this group of arthropods have 2 body regions: for…

Members of this group of arthropods have 2 body regions: forebody & hind body, 4 pairs of legs (= 8 total), and other specialized appendages near the mouth (e.g., pedipalps). In addition, they do not have antennae and have 1- 6 pairs of simple eyes that do not normally form images. Which group could that be?