The giant isopod (related to the common pill bug) exemplifies this. A insectile Dream Creature similar in shape to a pill bug. Gnorimosphaeroma oregonense, the Oregon pill bug, is a small intertidal isopod crustacean. The best known species in the family is "Armadillidium vulgare", the common pill bug. "Armadillidium depressum" is a large pill bug, up to long.