Porcellionidae
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Porcellionidae is a terrestrial family of the order Isopoda. The species classified here cannot roll into a ball, as opposed to the species of family Armadillidiidae, which can.
This family contains 530 species in 17 genera, found on every continent except Antarctica.
[edit] Identification
The ventral plate of the thoracic exoskeleton flare out slightly over the legs. This "flare" is called the epimeron. The uropods, antenna-like structures at the back of the specimen, are flattened out and spearlike, and extend beyond the last exoskeletal plate.
