Granulated isopods (Armadillidium granulatum) are your standard, gray, roly-poly type of isopod - with some yellow speckling for flare. They're native to Spain. They do well in lower humidity ranges than most other isopods, making them great candidates for bio-active desert set-ups.
They're not the most prolific isopod you can culture, but they'll do quite well as long as you provide appropriate care. They're hardy, forgiving, and can tolerate normal room temperature with high humidity (like all other isopods).
The infamous magic potion isopod is closely related to granulated isopods.