MorphologyRead full entry
These animals are somewhat flattened, and several times longer than wide. The top and sides of animals in this group are covered by a row of tough plates. Underneath they have 7 pairs of legs. On the head is a pair of antennae. Some species can curl up into a ball for protection, this is where they get the name "pillbug."
Other Physical Features: ectothermic ; bilateral symmetry
Sexual Dimorphism: sexes alike