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    22 days ago

    Pill bugs in the family Armadillidiidae are able to form their bodies into a ball shape, in a process known as conglobation.  Conglobation has evolved independently in several families; this behaviour is shared with pill millipedes (which are often confused with pill bugs),[8] armadillos, cuckoo wasps, and some extinct trilobites.

    Look similar, but sounds like it developed separately.